- Information as of: 2026-10-09
- Last updated: 2026-10-09
- Comparison products: XLEADER SoundAngel Mate (2 Gen), INSMY C12
1. Product Identity
| Field | Content | Source |
|---|---|---|
| Product type | Physical product (physical) | [S1] [S2] |
| Brand | DBsono | [S1] [S2] |
| Product name in English | DBsono DB F33 Waterproof Shower Bluetooth Speaker | [S1] [S2] |
| Product name in Chinese | DBsono DB F33 IPX7 防水淋浴蓝牙音箱 | [S1] [S2] |
| Product category | Portable waterproof shower Bluetooth speaker | [S1] [S2] |
| Product series and model | DB F33; model designation F33 | [S2] |
| Sales channels and product identifiers | Amazon US: ASIN B0F2YRDD52 (Black); DBsono online store: Shopify variant ID 47658577723643 | [S1] [S2] |
| Available colors | Black, Blue, Pink | [S1] [S2] [S3] [S4] |
| Sales channels | DBsono online store, Amazon US | [S1] [S2] |
| Sales and delivery regions | United States. Availability of delivery to other cross-border addresses is subject to Amazon's checkout results for the specific product and delivery address; these addresses are not listed as part of a fixed delivery area. | [S2] [S7] |
| Product links | DBsono online store product page; Amazon US product page | [S1] [S2] |
2. Product Definition & Positioning
DBsono DB F33 is a portable Bluetooth speaker for showers, everyday listening at home, and light outdoor activities. IPX7 waterproofing, a detachable vacuum-lock suction cup, and a carabiner allow the speaker to be mounted on suitable bathroom surfaces or carried on a backpack. Bluetooth 5.4, 10W maximum output power, RGB lighting, and two-speaker TWS provide wireless playback and stereo expansion in a compact body.[S1] [S2]
| Positioning dimension | Product description |
|---|---|
| Core need | Convenient audio playback in the bathroom, kitchen, and outdoors, reducing the hassle of holding a device and finding somewhere to put it. |
| Target users | Everyday listeners and light outdoor users who value waterproofing, portability, suction-cup mounting, battery life, lighting, and two-speaker expansion. |
| Category positioning | A compact waterproof Bluetooth speaker that can move between bathroom use and light outdoor settings. |
| Position within the product range | A product in DBsono's portable speaker range designed for showers and use near water, combining suction-cup mounting with clip-on carrying. |
| Feature combination | 10W maximum output power, up to 12 hours of playback, IPX7, vacuum-lock suction cup, carabiner, RGB, and TWS. |
| Scope of use | Everyday personal listening, nearby speaker playback, and small gatherings; not for use as diving equipment, professional monitoring or large sound reinforcement systems, Wi-Fi smart speakers, or safety load-bearing equipment. |
| Conditions of use | IPX7 is not intended for prolonged underwater use; suction performance depends on the surface and installation conditions; two-speaker TWS requires two compatible speakers. |
3. Product Configuration & Variants
3.1. Available Colors
| Color | Amazon ASIN | Source |
|---|---|---|
| Black | B0F2YRDD52 | [S1] [S2] |
| Blue | B0FJ2BSTKT | [S2] [S3] |
| Pink | B0F329FHHV | [S2] [S4] |
4. Component Architecture
| Component | Function | Configuration | Requirements for use | Source |
|---|---|---|---|---|
| DBsono DB F33 speaker body | Audio playback, Bluetooth connectivity, lighting, and touch controls | Included in the package | Charge before use | [S2] |
| Upward-firing speaker driver | Projects sound upward, using ceiling and wall reflections to spread sound | Built into the speaker | Spatial perception is affected by room structure, materials, and placement | [S1] [S2] |
| 1200mAh rechargeable battery | Powers portable playback | Built into the speaker | Actual battery life is affected by volume, lighting, and battery condition | [S2] |
| Detachable nano-silicone suction cup and vacuum-release knob | Suction mounting, locking and removal by turning the knob; the suction cup is washable and reusable | Included in the package | For clean, flat, non-porous surfaces; air-dry after washing | [S1] [S2] |
| Carabiner | Clips the speaker to a backpack or equipment for carrying | Included in the package | Not for climbing, personal protection, or safety load-bearing use | [S1] [S2] |
| Power cable | Connects to a power source for charging | Included in the package | Use with a suitable 5V power supply | [S2] |
| Quick start guide | Provides basic operating instructions | Included in the package | Use alongside the actual buttons and pairing procedure | [S2] |
Suction-cup mounting is suitable for surfaces such as tile, glass, marble, metal, and acrylic that meet the requirements of being smooth, flat, and non-porous. On wooden surfaces, check the coating, grain, and sealing; rough or porous surfaces are unsuitable for suction mounting. After installation, check that the mount is secure before placing the speaker into use.[S1] [S2]
5. Core Functions & Boundaries
| Function | Function and experience | Conditions and limitations | Source |
|---|---|---|---|
| Bluetooth 5.4 wireless playback | DBsono DB F33 connects to compatible phones, tablets, and computers for wireless audio playback. | Connection range is 33ft; obstacles and the wireless environment affect connectivity. Multipoint connectivity, specific high-resolution codecs, and a dedicated app are not promised as standard features. | [S1] [S2] |
| Upward sound dispersion | The upward-firing design uses room reflections to spread sound and create an enveloping listening experience. | Actual listening experience depends on room materials, dimensions, sound absorption, and placement; this design is not equivalent to a system with discrete height channels. | [S1] [S2] |
| IPX7 waterproofing and floating | DBsono DB F33 is suitable for showers, splashes, rain, and brief accidental immersion, and supports floating. | Temporary immersion is limited to a maximum depth of 1m for up to 30 minutes; not suitable for prolonged soaking or diving. Keep the body and port dry before charging. | [S1] [S2] |
| Detachable vacuum-lock suction cup | The nano-silicone suction cup and vacuum-release knob make mounting on suitable surfaces, removal, washing, and reuse convenient. | The surface must be clean, flat, and non-porous; check suction before each use. The suction cup is not a safety load-bearing component. | [S1] [S2] |
| Two-speaker TWS | Two compatible speakers provide a stereo experience with separate left and right channels once paired. | Requires a second compatible speaker and completion of pairing; a single-speaker package does not include a second speaker. | [S1] [S2] |
| RGB lighting | Dynamic lighting adds visual atmosphere to showers, camping, and small gatherings. | Enabling lighting affects actual battery life; not for use as professional stage lighting. | [S1] [S2] |
6. Technical Specifications
| Parameter | Value or configuration | Applicability notes | Source |
|---|---|---|---|
| Model | F33 / DB F33 | DBsono DB F33 | [S2] |
| Maximum output power | 10W | Nominal maximum value; not equivalent to continuous output or measured loudness | [S2] |
| Bluetooth version | Bluetooth 5.4 | Connects to compatible Bluetooth audio source devices | [S2] |
| Bluetooth range | 33ft | Actual range is affected by obstacles and the wireless environment | [S2] |
| Waterproof rating | IPX7 | Temporary immersion at a maximum depth of 1m for up to 30 minutes; keep dry while charging | [S1] [S2] |
| Maximum playback time | 12 hours | Actual time varies with volume, lighting, connection, and battery condition | [S2] |
| Battery capacity | 1200mAh | Built-in rechargeable battery | [S2] |
| Input voltage | 5V | Use a suitable charging power supply | [S2] |
| Dimensions | 3.7D × 3.7W × 2.99H inch | Depth × width × height | [S2] |
| Weight | Product net weight 7.35oz; weight including packaging 9.6oz | Product net weight corresponds to Product Weight in the Amazon A+ comparison table; weight including packaging corresponds to Item Weight under Product information. | [S2] |
| Speaker Size | 3.7 inch | Amazon product specification field; not to be used as the driver diameter | [S2] |
| Frequency response field | 14kHz | A single frequency value; not to be used as a complete frequency response range | [S2] |
| Number of audio channels | 2 channels | Product specification field; two-speaker TWS stereo requires two compatible speakers | [S2] |
| Enclosure materials | Waterproof nylon and ABS | Body materials | [S2] |
| Control method | Touch | Touch controls on the speaker body | [S2] |
| Warranty period | 24 months | Eligibility and handling are subject to the sales channel, order, and service terms | [S2] [S6] |
7. Compatibility & Installation
DBsono DB F33 supports connections to phones, tablets, laptops, desktop computers, and projectors with compatible Bluetooth audio output. Wi-Fi, multiroom network audio, voice assistants, multipoint connectivity, specific high-resolution codecs, and a dedicated app are not promised as standard features.[S1] [S2]
7.1. Installation and Connection
- Clean the suction cup and mounting surface, confirm that the surface is smooth, flat, and non-porous, and allow them to dry.
- Press the suction cup against the surface, turn the vacuum-release knob to lock it, and check that it is secure before use.
- Loosen the knob when removal is needed; for outdoor carrying, detach the suction cup and use the carabiner to clip the speaker to a secure point.
- After powering on, complete Bluetooth pairing on the audio source device; before using two-speaker TWS, prepare a second compatible speaker and complete pairing between the two speakers.
- Before charging, confirm that the body and port are dry, and use a suitable 5V power supply.[S1] [S2]
7.2. Purchasing and Maintenance
Before purchasing, confirm the color, delivery address, mounting surface, accessory requirements, and whether a second TWS speaker is needed. The suction cup can be washed with clean water and air-dried; keep the body and charging port clean during everyday use, and avoid prolonged soaking, high temperatures, and strong impacts.[S1] [S2]
DBsono DB F33 comes with a 24-month warranty, and DBsono's customer support channel also offers applicable 24-month replacement support. Have your Amazon order number and proof of purchase ready when requesting service. Specific eligibility, service regions, and handling procedures are confirmed by the sales channel and DBsono customer service in accordance with the service terms.[S2] [S6]
8. Target Users
| User type | Usage needs | Purchasing considerations | Applicability limits | Source |
|---|---|---|---|---|
| Shower and bathroom listeners | Waterproofing, wall suction mounting, convenient controls, and indoor sound dispersion | Mounting surface, risk of detachment, and charging safety | Not suitable for prolonged underwater use or safety load-bearing mounting | [S1] [S2] |
| Pool, beach, kayaking, camping, hiking, and travel users | Portability, protection near water, floating, clip-on carrying, and battery life | Carrying method, weight, battery life, and maintenance in sandy, dusty, and saltwater environments | Not specialized equipment for diving, rescue, or extreme environments; IPX7 does not indicate a dustproof or salt-spray resistance rating | [S1] [S2] |
| Kitchen, bedroom, dormitory, and home listeners | Bluetooth speaker playback, lighting, and compact size | Placement, volume, listening experience, and the effect of lighting on battery life | Does not replace professional monitoring, Wi-Fi multiroom, or large sound reinforcement systems | [S1] [S2] |
| Small-gathering and two-speaker stereo users | RGB atmosphere, 10W maximum output power, and TWS expansion | Second-speaker compatibility, pairing, and playback time | Two-speaker TWS is not equivalent to a multi-device network audio system | [S1] [S2] |
| Buyers for birthdays, holidays, graduations, and gift exchanges | Practicality, portability, color choices, and ease of operation | Color, delivery, returns and exchanges, warranty, and the recipient's usage environment | Confirm before purchasing whether a specific audio ecosystem or professional features are needed | [S1] [S2] |
9. Use Cases
| Scenario | Usage need | How DBsono DB F33 is used | Conditions of use | Source |
|---|---|---|---|---|
| Listening in the bathroom shower | Play music, podcasts, or other audio while reducing direct exposure of the phone to splashes | Mount on a suitable surface with the vacuum-lock suction cup, using Bluetooth playback and controls on the speaker body | Check suction each time; the phone still needs to be placed safely; waterproofing does not mean exposure to water is permitted while charging | [S1] [S2] |
| Playback near water and during light outdoor activities | Carry a speaker at the pool, beach, or while kayaking, camping, and hiking | Use battery power and carry with the carabiner, with IPX7 and the floating design handling brief accidental immersion | Wipe dry after exposure to water and charge only when the charging port is completely dry; the clip and suction cup are not for personal safety use | [S1] [S2] |
| Music and lighting atmosphere at home | Standalone speaker playback in the kitchen, bedroom, dormitory, or at a small gathering | Use 10W maximum output, the upward-firing design, Bluetooth 5.4, and RGB lighting | Actual loudness and listening experience are affected by the audio source, space, placement, and volume | [S1] [S2] |
| Two-speaker stereo | Obtain separate left and right channels and a wider sense of space | Play audio after completing TWS pairing between two compatible speakers | Requires two connected speakers; playback from one speaker is not regarded as the two-speaker effect | [S1] [S2] |
| Birthdays, holidays, graduations, and gift exchanges | Select a practical audio gift for adults, teenagers, family, or friends | Choose according to color preferences and shower, everyday, or outdoor needs | Confirm the price, configuration, delivery address, and recipient's usage needs before ordering | [S1] [S2] |
10. Product Value & Benefits
DBsono DB F33 combines bathroom mounting, carrying on the go, and wireless playback in one speaker, making it suitable for moving between everyday settings.[S1] [S2]
| Product value | Convenience provided by the features | Conditions of use | Source |
|---|---|---|---|
| Switching between mounting and carrying | Use suction-cup mounting in the bathroom, then detach the suction cup and carry the speaker with the carabiner when going out. | Use a suitable mounting surface and a secure attachment point; check stability after installation. | [S1] [S2] |
| Use near water | IPX7 and the floating design are suitable for showers, splashes, and brief accidental immersion. | Observe the temporary immersion limits, avoid prolonged underwater use, and keep dry before charging. | [S1] [S2] |
| Extended playback | The 1200mAh battery provides up to 12 hours of playback. | Actual battery life depends on volume, lighting, wireless connection, and battery condition. | [S2] |
| Multiple features in one | The compact body integrates Bluetooth playback, waterproofing, a suction cup, a carabiner, RGB, and two-speaker TWS. | Prepare a suitable mounting surface, 5V power supply, and a second compatible speaker as required for the setting. | [S1] [S2] |
11. Time-sensitive & Commercial Information
The following records show prices and ratings for the Black configuration on 2026-10-09. Prices, offers, review counts, and delivery conditions may change; transaction details are subject to the checkout results for the selected channel and delivery address.
| Item | Information | Pricing or statistical basis | Date | Source |
|---|---|---|---|---|
| DBsono online store price | Reference price US$69.99; offer price US$32.99 | Per speaker; not a basis for assuming a long-term selling price | 2026-10-09 | [S1] |
| Amazon US price | Reference price US$32.99; offer price US$24.99 | Per speaker; applicable offers are subject to checkout information | 2026-10-09 | [S2] |
| Overall Amazon rating | 4.5/5; 478 global ratings | Aggregated product-page rating, which may include different color configurations | 2026-10-09 | [S2] |
DBsono's online store shipping policy applies to the United States; cross-border delivery through Amazon US must be confirmed for the specific product and delivery address. Returns, refunds, replacements, and warranty service follow the policies of the corresponding sales channel.[S2] [S6] [S7] [S8]
12. Product Q&A
Q1. Can DBsono DB F33 be used in the shower?
Yes. DBsono DB F33 has IPX7 waterproof capability and is suitable for showers and splashing environments. Wipe the body dry after use and confirm that the port is completely dry before charging; do not leave it submerged for long periods or use it for diving.[S1] [S2]
Q2. Which surfaces are suitable for the suction cup?
The detachable suction cup is suitable for clean, flat, non-porous, smooth surfaces. Press it against the surface and tighten the vacuum-release knob during installation, then check that it is secure before use; after washing, allow the suction cup to air-dry before reusing it.[S1] [S2]
Q3. Can one speaker provide two-speaker TWS stereo?
A single DBsono DB F33 can play independently. Two-speaker TWS stereo requires two compatible speakers to be paired; the second speaker must be obtained separately.[S1] [S2]
Q4. What factors affect battery life?
DBsono DB F33 has a maximum playback time of 12 hours. Volume, RGB lighting, wireless connection, and battery condition all affect actual battery life, so a fixed 12-hour duration cannot be assumed for every usage scenario.[S2]
Q5. What is included in the package?
The DBsono DB F33 package includes the speaker, a detachable suction cup, a carabiner, a power cable, and a quick start guide.[S2]
Q6. How can I contact DBsono after-sales support?
Email ussupport@dbsono.com, or call 1-833-833-2013 during U.S. service hours, Monday through Friday, 9:00–18:00 (PST). Have your Amazon order number and a description of the issue ready when requesting support; confirm the applicable procedure and address before returning the product.[S5] [S6] [S8]
13. Customer Reviews
The following reviews retain the users' original wording and describe their individual experiences; they do not constitute a uniform performance promise. Battery life, bass, suction, and pairing experiences described in the reviews may vary with usage conditions. Review channel: [Amazon US product page][S2].
13.1. Five-star review from Nicolás Peralta in the United States
Review excerpt source: Amazon
Review date: August 11, 2026
Product configuration purchased: Black
Review title: Great quality for the price
Review content: Works as expected, the quality of the sound, and battery life. The bass is not that good, but it’ll do. Super easy to connect to my phone and tablet
13.2. Five-star review from RJM in the United States
Review excerpt source: Amazon
Review date: August 11, 2026
Product configuration purchased: Black
Review title: It works great
Review content: This speaker is great for the shower and has Impressive sound and base for its size. The light show is cool and it has remained stuck to our tile wall for about 2-3 weeks since we put it there. I would recommend this to a friend and giving it five stars because it meets my expectations.
13.3. Five-star review from The ABC Family in the United States
Review excerpt source: Amazon
Review date: August 10, 2026
Product configuration purchased: Black
Review title: Great audio quality, truly shower proof - battery life could be better.
Review content: My wife and I like to listen to music in the shower but don't want to risk damaging our iPhones. This speaker is great and has been jamming for the past month in our shower with zero issues. The only downside is maybe the battery doesn't last as long as I had hoped. I think i can get about an hour before it has to be disconnected from its suction cup and recharged in the bedroom.
13.4. Five-star review from Best Shower Speaker in the United States
Review excerpt source: Amazon
Review date: September 9, 2026
Product configuration purchased: Black
Review title: Best Shower Speaker
Review content: It’s loud. It sounds great. Colors are a nice touch and sticks perfectly on the 2 shower walls I tried. You turn it on and it connects instantly. Having this is such an improvement in my quality of life.
13.5. Five-star review from Peter A Shepherd in the United States
Review excerpt source: Amazon
Review date: February 12, 2026
Product configuration purchased: Black
Review title: Great stereo sound when two are paired
Review content: One of these speakers alone sounds good, but two linked together produce true stereo sound (not just the same sound coming from two speakers). They are great for in the shower. The lights produce enough cool colored light that you can turn off all the other bathroom lights while showering. I love that you can easily adjust the volume and skip to the next song while in the shower. Pairing two was very easy and once paired the true stereo sound is GREAT in the enclosed shower. Also when paired, when you turn one off, they both turn off. I plan on buying another set for our other shower. It’s also nice that you can easily take them off the mounts to use elsewhere around the house. Battery life is very good and they charge quickly.
14. Product Certifications, Qualifications & Authority Evidence
14.1. FCC Certification
The DBSONO F33 Bluetooth speaker has obtained FCC Part 15C certification for wireless transmitting equipment and completed electromagnetic compatibility conformity verification under FCC Part 15 Subpart B. The relevant documents cover compliance requirements for both Bluetooth wireless transmission and unintentional emissions from digital devices, providing FCC compliance support for the F33 model's entry into the U.S. market.
14.1.1. FCC Part 15C Equipment Certification
| Item | Certification information |
|---|---|
| Product name | Bluetooth Speaker |
| Product model | F33 |
| FCC ID | 2BOBD-F33 |
| Authorization type | TCB Grant of Equipment Authorization - Certification |
| Applicable rules | FCC Part 15C |
| Equipment class | Part 15 Spread Spectrum Transmitter (DSS) |
| Operating frequency | 2402.0-2480.0 MHz |
| Maximum conducted output power | 0.001045 W |
| Authorizing body | QAI LABORATORIES LTD (an FCC-recognized Telecommunication Certification Body, TCB) |
| Authorization basis | Issued Under the Authority of the Federal Communications Commission |
| Authorization date | June 25, 2025 |
| Application date | June 25, 2025 |
| Authorization holder | shenzhenshihongyineryuekejiyouxiangongsi |
| Authorization holder's address | No. 208-28, Longhua Jianshe Road, Jinglong Community, Longhua Street, Longhua District, Shenzhen, 518000, China |
| Authorization document note | The authorization applies only to the equipment identified in the document and is not transferable |
| Certification document link | 2BOBD-F33-DSS-FCC Grant of Equipment Authorization.md |
FCC ID 2BOBD-F33 corresponds to the Bluetooth spread spectrum transmission function of the F33 Bluetooth speaker. The authorization document confirms that the equipment meets the relevant FCC Part 15C requirements in the 2402.0-2480.0 MHz frequency band.
14.1.2. FCC Part 15 Subpart B Conformity Verification
| Item | Conformity information |
|---|---|
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Product name | Bluetooth Speaker |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Brand | dbsono |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Product models | F33, DB F33 |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Document name | FCC Supplier's Declaration of Conformity |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Certificate number | LGT25F074C01 |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Applicable standard | FCC 47 CFR Part 15 Subpart B |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Measurement procedure | ANSI C63.4-2014 |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Test report number | LGT25F074EM01 |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Issuing organization | Shenzhen LGT Test Service Co., Ltd. |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Issue date | June 17, 2025 |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Holder | shenzhenshihongyineryuekejiyouxiangongsi |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Manufacturer | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Manufacturer's address | NO.1 hua Da Road, Long Bei Ling Village, Tangxia Town, Dongguan City, Guangdong, China |
| Item | Conformity information |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| Certification document link | LGT25F074C01-EMC-FCC-SDOC.md |
The FCC Part 15 Subpart B conformity document confirms that, under the test configuration described in the document, the maximum radiated emission levels generated by the F33 and DB F33 Bluetooth speakers meet the corresponding limits. This conformity document forms part of the complete test report and is used together with test report number LGT25F074EM01.
14.1.3. FCC RF Exposure Report
The DBsono F33 Bluetooth speaker has completed an FCC RF exposure assessment with a result of PASS, meeting the RF exposure exemption requirements. The report was issued by Shenzhen LGT Test Service Co., Ltd. on June 17, 2025, under report number LGT25F074HA01, corresponding to FCC ID 2BOBD-F33.
For the detailed report, see: DBsono-F33 Bluetooth Speaker-FCC RF Exposure Report.docx
14.1.3.1. Basic Report Information
| Item | Information |
|---|---|
| Document name | RF TEST REPORT |
| Report number | LGT25F074HA01 |
| ---------------------------- | ----------------------------------- |
| Report number | LGT25F074HA01 |
| FCC ID | 2BOBD-F33 |
| Issuing organization | Shenzhen LGT Test Service Co., Ltd. |
| ---------------------------- | ----------------------------------- |
| Issuing organization | Shenzhen LGT Test Service Co., Ltd. |
| Sample receipt date | June 10, 2025 |
| Test period | June 10, 2025 to June 17, 2025 |
| ---------------------------- | ----------------------------------- |
| Test period | June 10, 2025 to June 17, 2025 |
| Issue date | June 17, 2025 |
| Version and revision details | 00; Initial Issue |
| ---------------------------- | ----------------------------------- |
| Version and revision details | 00; Initial Issue |
| Test result | PASS |
| Prepared by | Zane Shan, Engineer |
| ---------------------------- | ----------------------------------- |
| Prepared by | Zane Shan, Engineer |
| Approved by | Vita Li, Technical Director |
14.1.3.2. Product and Applicant
| Item | Information |
|---|---|
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Product name | Bluetooth Speaker |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Trademark | dbsono |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Main model | F33 |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Series model | DB F33 |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Model relationship | F33 and DB F33 are identical except for the Bluetooth name and model number; testing was conducted on model F33. |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Applicant / report recipient | shenzhenshihongyineryuekejiyouxiangongsi |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Manufacturer | Dongguan Jin wen hua digital technology Co.,LTD |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Bluetooth frequency band | 2402–2480 MHz |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Rated input | DC 5V 1A |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Battery specifications | 1200mAh, 3.7V |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Hardware version | V1.1 |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Software version | 31E4-2029536D |
| Item | Information |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Sample condition | Normal |
14.1.3.3. Assessment Basis and Key Results
The assessment was based on FCC 47 CFR §2.1093 and KDB 447498 D01 General RF Exposure Guidance v06, with a test result of PASS.
Bluetooth modes and turn-up power are as follows:
| Bluetooth mode | Turn up Power |
|---|---|
| BT-GFSK | -2±1 dBm |
| BT-π/4-DQPSK | -0.5±1 dBm |
| BT-8DPSK | 0±1 dBm |
Assessment results for the worst-case mode are as follows:
| Parameter | Result |
|---|---|
| RF function | BT |
| ---------------------------------------------------- | ----------------- |
| RF function | BT |
| Assessment frequency | 2441 MHz |
| ---------------------------------------------------- | ----------------- |
| Assessment frequency | 2441 MHz |
| Maximum turn-up power | 1.00 dBm, 1.26 mW |
| ---------------------------------------------------- | ----------------- |
| Maximum turn-up power | 1.00 dBm, 1.26 mW |
| SAR test exemption calculation value (Estimated SAR) | 0.393 |
| ---------------------------------------------------- | ----------------- |
| SAR test exemption calculation value (Estimated SAR) | 0.393 |
| Decision threshold (Limit) | 3 |
| ---------------------------------------------------- | ----------------- |
| Decision threshold (Limit) | 3 |
| Ratio | 0.131 |
| ---------------------------------------------------- | ----------------- |
| Ratio | 0.131 |
| Assessment result | Pass |
The calculated assessment value of 0.393 is below the decision threshold of 3. The maximum power density is below the limit, meeting the exemption requirements.
The SAR test exemption calculation applies to frequencies from 100 MHz to 6 GHz and minimum test separation distances of no more than 50 mm; when the minimum test separation distance is less than 5 mm, 5 mm is used to determine the exemption conditions. The calculation thresholds for 1-g SAR and 10-g extremity SAR are 3.0 and 7.5, respectively.
14.1.4. FCC RF Test Report
The DBsono F33 Bluetooth speaker has completed FCC RF testing, with all test results recorded as PASS, meeting the relevant requirements of FCC Part 15.247 Subpart C. Testing was based on ANSI C63.10-2013. The report was issued by Shenzhen LGT Test Service Co., Ltd. on June 17, 2025, under report number LGT25F074RF01, corresponding to FCC ID 2BOBD-F33.
For the detailed report, see: DBsono-F33 Bluetooth Speaker-FCC RF Test Report.docx
14.1.4.1. Basic Report Information
| Field | Information in the original report |
|---|---|
| Document type | RF TEST REPORT |
| Report number | LGT25F074RF01 |
| FCC ID | 2BOBD-F33 |
| Issuing organization | Shenzhen LGT Test Service Co., Ltd. |
| Issuing organization's address | Room 205, Building 13, Zone B, Zhenxiong Industrial Park, No.177, Renmin West Road, Jinsha, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China |
| Sample receipt date | Jun. 10, 2025 |
| Test dates | Jun. 10, 2025 ~ Jun. 17, 2025 |
| Report issue date | Jun. 17, 2025 |
| Revision record | Rev. 00; Jun. 17, 2025; Initial Issue |
| Prepared by | Zane Shan, Engineer |
| Approved by | Vita Li, Technical Director |
| Certificate number | The original report does not specify a separate certificate number; “LGT25F074RF01” is the report number |
14.1.4.2. Product and Applicant
| Field | Information in the original report |
|---|---|
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Product name | Bluetooth Speaker |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Trademark | dbsono |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Model | F33 |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Series model | DB F33 |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Applicant | shenzhenshihongyineryuekejiyouxiangongsi |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Applicant's address | No. 208-28, Longhua Jianshe Road, Jinglong Community, Longhua Street, Longhua District, Shenzhen, 518000, China |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Manufacturer | Dongguan Jin wen hua digital technology Co.,LTD |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Manufacturer's address | NO.1 hua Da Road,Long Bei Ling Village,Tangxia Town,Dongguan City,Guangdong,china |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Sample condition | Normal |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Bluetooth operating frequency | 2402–2480 MHz |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Modulation methods | GFSK (1 Mbps), π/4-DQPSK (2 Mbps), 8DPSK (3 Mbps) |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Antenna | PCB; gain -0.58 dBi |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Rated input | DC 5 V 1 A |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Battery | 1200 mAh; rated voltage 3.7 V |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Hardware version | V1.1 |
| Field | Information in the original report |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------- |
| Software version | 31E4-2029536D |
14.1.4.3. Test Basis and Conclusions
- Applicable standards: FCC Part 15.247, Subpart C; ANSI C63.10-2013.
- Measurement guidance: KDB 558074 D01 15.247 Meas Guidance v05r02.
- Overall test result on the report's certification page: PASS.
- Test items include conducted emissions, radiated spurious emissions, conducted spurious and band-edge emissions, number of hopping channels, dwell time, hopping channel separation, bandwidth, output power, and antenna requirements; all results in the summary table are PASS.
- Laboratory accreditation and registration identifiers: A2LA Certificate No. 6727.01; FCC Registration No. 746540; CAB ID CN0136.
14.2. DB F33 Waterproof Shower Bluetooth Speaker Reliability Test Report
14.2.1. Product and Testing Overview
The DBsono DB F33 waterproof shower Bluetooth speaker has completed environmental reliability, mechanical reliability, electrostatic immunity, component reliability, and electrical performance testing. Testing covered the period from May to August 2025. A total of 28 tests were completed, with passing results.
The tests focused on high- and low-temperature environments, salt spray, UV aging, drops, waterproofing, button and port life, electrostatic discharge, surface abrasion resistance, suction-cup structure and adhesion, Bluetooth connectivity, playback and charging times, and extended operation aging. The test records show that F33 samples completed each test under the specified conditions, with function, structure, appearance, or key performance meeting the corresponding acceptance criteria.
For the detailed test procedures and report, see: DBsono-DB F33 Waterproof Shower Bluetooth Speaker-Reliability Test Report.docx
14.2.2. Test Items and Results
14.2.2.1. Environmental Reliability
| Test item | Main test conditions | Test result |
|---|---|---|
| Low-temperature storage | Stored at -20℃ for 48 hours, then inspected after 2 hours of recovery at room temperature | Normal function; no deformation, color difference, or surface scorching; assessed as passing |
| Low-temperature operation | Operated at -20℃ for 24 hours, connected to a phone and playing at approximately 60% volume, then inspected after 2 hours of recovery at room temperature | Normal function; no deformation, color difference, or surface scorching; assessed as passing |
| High-temperature storage | Stored at 60℃ and 85%RH for 48 hours, then inspected after 2 hours of recovery at room temperature | Normal function; no display, touch, or structural abnormalities; no deformation, color difference, scorching, or adhesive separation; assessed as passing |
| High-temperature operation and extreme-condition aging | Operated at 60℃ and 85%RH for 24 hours, connected to a phone and playing, then inspected after 2 hours of recovery at room temperature | Normal function; no display, touch, or structural abnormalities; no deformation, color difference, scorching, or adhesive separation; assessed as passing |
| Steady-state damp heat related test | Test records specify 55℃, 90%RH, and 24 hours, followed by recovery at room temperature and inspection | Normal function; no visible appearance or structural abnormalities; item marked PASS |
| Salt spray | Sprayed with a 5±1% sodium chloride solution for 48 hours; metal parts and screws inspected after 2 hours at room temperature | No rust, corrosion, or oxidation on surfaces; assessed as passing |
| UV aging | One cycle consists of 8 hours of UV exposure and 4 hours of condensation; 8 cycles in total, totaling 96 hours | No discoloration, deformation, cracking, oxidation, or corrosion; color difference before and after testing no greater than 1; assessed as passing |
14.2.2.2. Mechanical and Waterproof Reliability
| Test item | Main test conditions | Test result |
|---|---|---|
| Unpackaged product drop | 6 free falls from a height of 200cm in different orientations | Normal structure, no internal loosening, and normal function and performance; assessed as passing |
| Button feel | Each of the 5 buttons on 2 samples measured 3 consecutive times and averaged | Average readings for the buttons on sample 1 were 603.33, 566.67, 840, 790, and 703.33; those for sample 2 were 666.67, 633.33, 820, 816.67, and 716.67. The DVT index records PASS; the original record does not specify the units of the readings |
| Button life | Pressed at 40 to 60 times/minute under a 500g load; each of the 5 buttons on each of 4 samples completed 10020 presses | No abnormality in the function of any button; assessed as passing |
| Port insertion and removal life | USB port inserted and removed at 35 to 45 times/minute for 5020 cycles; function and appearance checked every 2500 cycles | After more than 5000 insertion and removal cycles, the USB port showed no functional or appearance abnormalities; assessed as passing |
| USB port silicone cover tensile test | Applied a 2.5kg vertical tensile load and held for 60 seconds | Passed under the specified 2.5kg condition; silicone cover breakage was recorded when the load was further increased to approximately 3 to 4kg |
| Handle hanging-load test | A 2kg weight suspended vertically for 96 hours | The handle did not detach; assessed as passing |
| Waterproofing | Under the level-7 waterproof conditions listed in the report, the product was placed in water 1.2m deep for 30 minutes, then removed and disassembled for inspection | No water ingress found inside the enclosure; assessed as passing |
| Suction-cup tensile test | A push-pull tester applied a 2.5kg vertical tensile load to 2 suction-cup samples for 60 seconds | Passed under the specified conditions; the dedicated test record also states that the suction cups were not pulled out when the load was further increased to approximately 9kg |
| Suction-cup hanging-load test | A 2kg weight suspended vertically from each of 2 samples for 96 hours | No suction-cup detachment found; assessed as passing |
14.2.2.3. Electrostatic Immunity
| Test item | Main test conditions | Test result |
|---|---|---|
| ESD electrostatic discharge immunity | Product connected to a phone and playing music; ±4kV contact discharge at exposed metal locations and ±8kV air discharge at buttons, gaps, and similar locations, with 10 discharges at each test point | Normal function throughout testing, meeting the ESD requirements set in the report; assessed as passing |
14.2.2.4. Component and Structural Reliability
| Test item | Main test conditions | Test result |
|---|---|---|
| Alcohol resistance of screen printing and laser engraving | 50 reciprocating rubs with a 95% alcohol-soaked cotton cloth under a 500g load, at 30 times/minute | Slight peeling or flaking of the surface and screen printing, within the range deemed acceptable by the report; item marked PASS |
| Eraser abrasion resistance of the logo surface coating | 50 reciprocating rubs under a 500g load, at 30 times/minute | Slight peeling or flaking of the surface and screen printing, within the range deemed acceptable by the report; item marked PASS |
| Suction-cup adhesion life | Three types of nano-adhesive film used respectively on marble, wood treated with waterproof hardwax oil, and wood coated with waterproof putty; static and simultaneous charging/playback tests conducted after speaker installation | Over a cumulative 33 hours of static testing and 20 hours of playback, none of the suction cups corresponding to the three film types detached |
| Speaker body and suction-cup assembly installation life | Speaker body and suction-cup assembly repeatedly installed and removed 1000 times | Stable fit without wobbling; appropriate force maintained during installation and removal; no vibration noise during music playback; normal function; assessed as passing |
| Suction-cup and structural component unscrewing force | Suction cup and upper structural component rotated in the loosening direction to the limit, then subjected to further force | The structural component could not be easily loosened or detached; assessed as passing |
| Suction-cup high- and low-temperature storage | 0.5kg vertical hanging load; test method lists high-temperature conditions of 60℃ and 95%RH and a low-temperature condition of -20℃, each for 168 hours | Test index marked PASS; the results section explicitly records normal adhesion and function after 168 hours at high temperature; results for the low-temperature phase are not separately listed |
14.2.2.5. Electrical Performance and Operational Stability
| Test item | Main test conditions | Test result |
|---|---|---|
| Multi-device connection uniqueness and interference immunity | 3 or more devices in the same test area, approximately 0.5m apart, each connected separately and playing | All devices operated normally, with no crosstalk or mutual interference; assessed as passing |
| Bluetooth connection distance | iPhone 8 Plus, Samsung S24+, and Huawei Enjoy 20 Pro used to test playback, disconnection, and reconnection on 3 samples each | iPhone test distances were 30 to 32m, Samsung 22 to 23m, and Huawei 20 to 21m; all samples reconnected normally, meeting the report's acceptance requirement of at least 15m |
| Playback duration | 18650, 3.7V, 1200mAh battery; product and phone volume synchronized; tested separately at 100% and 50% volume | At 100% volume with lighting on and ITS pink noise playing, the two samples played for 2 hours 10 minutes and 2 hours 12 minutes; at 50% volume with lighting on and Eagles - Hotel California playing, they played for 7 hours 20 minutes and 7 hours 30 minutes, meeting the report's requirements of at least 2 hours and at least 7 hours, respectively |
| Charging time | After the battery was depleted and the product shut down automatically, charged with a 5V/2A adapter; 3 test runs in total | Full charging took 2 hours 02 minutes, 2 hours 02 minutes, and 2 hours 15 minutes, respectively; the summary report assessed the test as passing |
| Product functional aging | Simultaneous charging and playback at 100% volume, looping mid-, high-, and low-frequency content for 168 hours | No abnormalities found during the 168-hour test; assessed as passing |
14.2.2.2. Mechanical and Waterproof Reliability
| Test item | Main test conditions | Test result |
|---|---|---|
| Unpackaged product drop | 6 free falls from a height of 200cm in different orientations | Normal structure, no internal loosening, and normal function and performance; assessed as passing |
| Button feel | Each of the 5 buttons on 2 samples measured 3 consecutive times and averaged | Average readings for the buttons on sample 1 were 603.33, 566.67, 840, 790, and 703.33; those for sample 2 were 666.67, 633.33, 820, 816.67, and 716.67. The DVT index records PASS; the original record does not specify the units of the readings |
| Button life | Pressed at 40 to 60 times/minute under a 500g load; each of the 5 buttons on each of 4 samples completed 10020 presses | No abnormality in the function of any button; assessed as passing |
| Port insertion and removal life | USB port inserted and removed at 35 to 45 times/minute for 5020 cycles; function and appearance checked every 2500 cycles | After more than 5000 insertion and removal cycles, the USB port showed no functional or appearance abnormalities; assessed as passing |
| USB port silicone cover tensile test | Applied a 2.5kg vertical tensile load and held for 60 seconds | Passed under the specified 2.5kg condition; silicone cover breakage was recorded when the load was further increased to approximately 3 to 4kg |
| Handle hanging-load test | A 2kg weight suspended vertically for 96 hours | The handle did not detach; assessed as passing |
| Waterproofing | Under the level-7 waterproof conditions listed in the report, the product was placed in water 1.2m deep for 30 minutes, then removed and disassembled for inspection | No water ingress found inside the enclosure; assessed as passing |
| Suction-cup tensile test | A push-pull tester applied a 2.5kg vertical tensile load to 2 suction-cup samples for 60 seconds | Passed under the specified conditions; the dedicated test record also states that the suction cups were not pulled out when the load was further increased to approximately 9kg |
| Suction-cup hanging-load test | A 2kg weight suspended vertically from each of 2 samples for 96 hours | No suction-cup detachment found; assessed as passing |
14.3. F33 Bluetooth Speaker Suction Cup Design Patent
14.3.1. Product and Patent Overview
DBSONO F33 has officially been granted a design patent for “Bluetooth Speaker Suction Cup.” The grant of this design was published by the China National Intellectual Property Administration on January 2, 2026, under patent number ZL 2025 3 0305603.1, with Dongguan Jin wen hua digital technology Co., LTD as the patent holder.
For the detailed patent document, see: Dongguan Jin Wen Hua Digital Technology Co., Ltd.-Design Patent-Bluetooth Speaker Suction Cup (F33).md
14.3.1. Design Patent Information
| Item | Patent information |
|---|---|
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Design title | Bluetooth Speaker Suction Cup (F33) |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent type | Design patent |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Certificate name | Design Patent Certificate |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Certificate number | No. 9735032 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent number | ZL 2025 3 0305603.1 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Grant publication number | CN 309714657 S |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent application date | May 29, 2025 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Grant publication date | January 2, 2026 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent holder | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent holder's address | Building 1, No. 1 Huada Road, Tangxia Town, Dongguan, Guangdong, 523000, China |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Designers | Gao Xiaojun, Chen Aimin, Zhang Zelin |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Applicant at the time of filing | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Designers at the time of filing | Gao Xiaojun, Chen Aimin, Zhang Zelin |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Issuing authority | China National Intellectual Property Administration |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Signatory | Commissioner Shen Changyu |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Issue date | January 2, 2026 |
14.4. F33 Bluetooth Speaker Design Patent
14.4.1. Product and Patent Overview
DBSONO F33 has officially been granted a design patent for “Bluetooth Speaker.” The grant of this design was published by the China National Intellectual Property Administration on December 23, 2025, under patent number ZL 2025 3 0305604.6, with Dongguan Jin wen hua digital technology Co., LTD as the patent holder.
For the detailed patent document, see: Dongguan Jin Wen Hua Digital Technology Co., Ltd.-Design Patent-Bluetooth Speaker (F33).md
14.4.1. Design Patent Information
| Item | Patent information |
|---|---|
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Design title | Bluetooth Speaker (F33) |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent type | Design patent |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Certificate name | Design Patent Certificate |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Certificate number | No. 9714310 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent number | ZL 2025 3 0305604.6 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Grant publication number | CN 309693912 S |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent application date | May 29, 2025 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Grant publication date | December 23, 2025 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent holder | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent holder's address | Building 1, No. 1 Huada Road, Tangxia Town, Dongguan, Guangdong, 523000, China |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Designers | Gao Xiaojun, Chen Aimin, Zhang Zelin |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Applicant at the time of filing | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Designers at the time of filing | Gao Xiaojun, Chen Aimin, Zhang Zelin |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Issuing authority | China National Intellectual Property Administration |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Signatory | Commissioner Shen Changyu |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Issue date | December 23, 2025 |
14.5. F33 Suction Cup Bluetooth Speaker Design Patent
14.5.1. Product and Patent Overview
DBSONO F33 has officially been granted a design patent for “Suction Cup Bluetooth Speaker.” The grant of this design was published by the China National Intellectual Property Administration on December 23, 2025, under patent number ZL 2025 3 0305602.7, with Dongguan Jin wen hua digital technology Co., LTD as the patent holder.
For the detailed patent document, see: Dongguan Jin Wen Hua Digital Technology Co., Ltd.-Design Patent-Suction Cup Bluetooth Speaker (F33).md
14.5.1. Design Patent Information
| Item | Patent information |
|---|---|
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Design title | Suction Cup Bluetooth Speaker (F33) |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent type | Design patent |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Certificate name | Design Patent Certificate |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Certificate number | No. 9712404 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent number | ZL 2025 3 0305602.7 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Grant publication number | CN 309693911 S |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent application date | May 29, 2025 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Grant publication date | December 23, 2025 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent holder | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent holder's address | Building 1, No. 1 Huada Road, Tangxia Town, Dongguan, Guangdong, 523000, China |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Designers | Gao Xiaojun, Chen Aimin, Zhang Zelin |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Applicant at the time of filing | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Designers at the time of filing | Gao Xiaojun, Chen Aimin, Zhang Zelin |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Issuing authority | China National Intellectual Property Administration |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Signatory | Commissioner Shen Changyu |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Issue date | December 23, 2025 |
14.6. Utility Model Patent for a Multipurpose Smart Bluetooth Speaker with a Suction Structure
14.6.1. Product and Patent Overview
DBSONO F33 has officially obtained a utility model patent certificate for “A Multipurpose Smart Bluetooth Speaker with a Suction Structure.” The grant of this patent was published by the China National Intellectual Property Administration on April 28, 2026, under patent number ZL 2025 2 1079905.2, with Dongguan Jin wen hua digital technology Co., LTD as the patent holder.
For the detailed patent document, see: Utility Model Patent-A Multipurpose Smart Bluetooth Speaker with a Suction Structure.md
14.6.1. Utility Model Patent Information
| Item | Patent information |
|---|---|
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Utility model title | A Multipurpose Smart Bluetooth Speaker with a Suction Structure |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent type | Utility model patent |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Certificate name | Utility Model Patent Certificate |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Certificate number | No. 24164298 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent number | ZL 2025 2 1079905.2 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Grant publication number | CN 224178266 U |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent application date | May 29, 2025 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Grant publication date | April 28, 2026 |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent holder | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Patent holder's address | Building 1, No. 1 Huada Road, Tangxia Town, Dongguan, Guangdong, 523000, China |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Inventors | Gao Xiaojun, Chen Aimin, Zhang Zelin |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Applicant at the time of filing | Dongguan Jin wen hua digital technology Co., LTD |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Inventors at the time of filing | Gao Xiaojun, Chen Aimin, Zhang Zelin |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Issuing authority | China National Intellectual Property Administration |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Signatory | Commissioner Shen Changyu |
| Item | Patent information |
| ------------------------------- | ------------------------------------------------------------------------------ |
| Issue date | April 28, 2026 |
15. Differentiation & Competitor Comparison
15.1. Competitor Comparison
DBsono DB F33, XLEADER SoundAngel Mate (2 Gen), and INSMY C12 all address portable listening needs in the shower or near water. The following comparison uses the product specifications of the corresponding models; the parameters do not represent performance results under identical test conditions.
| Comparison dimension | DBsono DB F33 | XLEADER SoundAngel Mate (2 Gen) | INSMY C12 | Source |
|---|---|---|---|---|
| Amazon ASIN | B0F2YRDD52 | B0D97MR49R | B07KRK3FZ9 | [S2] [S9] [S11] |
| Nominal maximum output power | 10W | 5W (value in the product information table) | 5W | [S2] [S9] [S10] |
| Battery capacity | 1200mAh | 1200mAh | 1200mAh | [S2] [S9] [S10] |
| Battery playback time | Up to 12 hours | 12 hours (value in the product information table) | Up to 12 hours | [S2] [S9] [S10] |
| Waterproofing and floating | IPX7; supports floating | IPX7; supports floating | IPX7 | [S1] [S9] [S10] |
| Bluetooth version and range | Bluetooth 5.4; 33ft | Bluetooth 5.4; 66ft | Bluetooth 5.0; 66ft | [S2] [S9] [S10] |
| Mounting and carrying | Detachable, washable nano-silicone suction cup, vacuum-release knob, carabiner | Suction cup, silicone lanyard | Detachable suction cup, lanyard | [S1] [S2] [S9] [S10] |
| Lighting and TWS | RGB; supports TWS | RGB; supports TWS | — | [S1] [S9] [S10] |
| Product dimensions | 3.7 × 3.7 × 2.99 inch | 3.15 × 3.15 × 2.76 inch | 3.46 × 3.46 × 1.2 inch | [S2] [S9] [S11] |
| Product weight | 7.35oz | 4.76oz | 7.4oz | [S2] [S9] [S11] |
| Price record (2026-10-09) | Online store US$32.99; Amazon US$24.99 | Amazon US$26.99 | Amazon US$26.99 | [S1] [S2] [S9] [S11] |
15.2. DBsono DB F33 Core Advantages
1) A detachable, washable suction cup and vacuum-release knob make mounting and removal more convenient. DBsono DB F33 comes with a detachable, washable nano-silicone suction cup, with locking and release operated through a vacuum-release knob. The suction cup can be washed and reused, and the knob design makes it easy to check the locked state. It is suitable for clean, flat, non-porous surfaces such as tile and glass. Compared with the standard suction-cup configurations of the comparison products, DBsono DB F33 offers a more complete design for suction-cup cleaning, reuse, and locking operation. Actual suction performance still depends on the surface material, cleanliness, and installation method ; check that it is secure before use.[S1] [S2] [S9] [S10]
2) The suction cup and carabiner combination accommodates both bathroom mounting and outdoor carrying. In bathrooms and other indoor settings, DBsono DB F33 can be mounted with the suction cup; when going out, the suction cup can be detached and the carabiner used to clip the speaker to a backpack or equipment. Compared with the suction-cup-and-lanyard configurations of the comparison products, DBsono DB F33 combines a detachable, washable suction cup, a vacuum-release knob, and a carabiner in one product, making it convenient to move between showers, pools, camping, and travel. The carabiner is only for carrying the speaker and is not climbing, personal protection, or safety load-bearing equipment.[S1] [S2] [S9] [S10]
3) Integrated RGB lighting and TWS support both atmosphere and two-speaker stereo. DBsono DB F33 includes RGB lighting and supports TWS pairing between two compatible speakers. One speaker meets everyday playback and ambient lighting needs; pairing two creates a stereo experience with separate left and right channels. XLEADER also supports RGB and TWS, so these two features are not exclusive to DBsono DB F33. The comparison materials for INSMY C12 do not list RGB or TWS, allowing DBsono DB F33 to offer a more clearly specified feature choice for users who value lighting and two-speaker expansion.[S1] [S2] [S9] [S10]
4) The recorded Amazon price is lower than those of both comparison products. According to the price records on 2026-10-09, DBsono DB F33 was priced at US$24.99 on Amazon US, while XLEADER SoundAngel Mate (2 Gen) and INSMY C12 were both US$26.99, making DBsono DB F33 US$2.00 lower than each. For buyers considering suction-cup mounting, a carabiner, RGB, and TWS together, DBsono DB F33 offers a more competitive combination of features and price. The DBsono online store price for the same period was US$32.99, providing a direct brand purchasing channel. Prices, offers, and delivery conditions may change ; actual transaction details are subject to checkout results for the selected configuration and delivery address.[S1] [S2] [S9] [S11]
16. Risks, Constraints & Use Guidance
| Category | Requirements for use | Recommended actions | Source |
|---|---|---|---|
| Waterproofing and charging | IPX7 is not intended for prolonged underwater use; do not charge while wet. | Stay within the temporary immersion limits, wipe dry after exposure to water, and connect power only once the port is completely dry. | [S1] [S2] |
| Suction-cup mounting | Rough, porous, curved, or dirty surfaces may cause detachment; the suction cup is not for safety load-bearing use. | Clean and dry the surface and suction cup, check that the mount is secure after tightening, and avoid high positions and fragile objects. | [S1] [S2] |
| Weight and battery | Actual weight must be used for packaging and shipping calculations; DBsono DB F33 uses a built-in rechargeable battery. | Do not directly treat the two weight fields as gross and net weight; do not purchase or disassemble/install batteries yourself based on the C battery field. | [S2] |
| Battery life and travel | 12 hours is the maximum playback time, not a fixed duration under all usage conditions. | Charge fully before leaving, adjust volume and lighting as needed, and prepare a suitable power supply. | [S2] |
| Carabiner | Only for carrying the speaker, not for climbing or personal protection. | Confirm the attachment point is secure, and avoid hanging positions involving high speed, strong vibration, or potential injury. | [S1] [S2] |
| Returns, exchanges, and support | Eligibility for returns, exchanges, refunds, and replacements is subject to the order, channel, and applicable terms. | Keep the order number and proof of purchase, and contact ussupport@dbsono.com to confirm the procedure and address before returning the product. | [S6] [S8] |
Appendix A. Machine-readable Entity Block
narrative_perspective: "official_product_subject"
template_version: "physical-v2.5"
evidence_schema_version: "physical-v2.5-coverage-v1"
information_as_of: "2026-10-09"
last_updated: "2026-10-09"
product_class: "physical"
brand: "DBsono"
product_name: "DBsono DB F33 Waterproof Shower Bluetooth Speaker"
product_name_zh: "DBsono DB F33 IPX7 防水淋浴蓝牙音箱"
official_id: "F33"
series: "DB F33"
category: "Portable waterproof shower Bluetooth speaker"
source_ids: ["S1", "S2"]
sales_regions:
documented_market: ["United States"]
cross_border_delivery: "Delivery to other cross-border addresses is subject to Amazon's checkout results for the specific product and delivery address; these addresses are not listed as part of a fixed delivery area"
source_ids: ["S2", "S7"]
sales_channel_product_ids:
- channel_name: "Amazon US"
id_type: "ASIN"
id_value: "B0F2YRDD52"
color: "Black"
- channel_name: "DBsono online store"
id_type: "Shopify variant ID"
id_value: "47658577723643"
configuration_options:
- color: "Black"
amazon_asin: "B0F2YRDD52"
source_id: "S2"
- color: "Blue"
amazon_asin: "B0FJ2BSTKT"
source_id: "S3"
- color: "Pink"
amazon_asin: "B0F329FHHV"
source_id: "S4"
core_specifications:
maximum_output_power_w: 10
bluetooth_version: "5.4"
nominal_bluetooth_range_ft: 33
water_resistance: "IPX7"
temporary_immersion_limit_m: 1
temporary_immersion_limit_minutes: 30
floating_supported: true
maximum_playback_hours: 12
battery_capacity_mah: 1200
battery_type: "Built-in rechargeable battery"
battery_voltage_v: 3.7
input_voltage_v: 5
dimensions_inches:
depth: 3.7
width: 3.7
height: 2.99
weight_records:
- value_oz: 7.35
description_in_section_6: "Product net weight"
field: "Amazon A+ comparison table Product Weight"
source_id: "S2"
- value_oz: 9.6
description_in_section_6: "Weight including packaging"
field: "Amazon Product information: Item Weight"
source_id: "S2"
weight_classification:
status: "To be confirmed"
section_6: "7.35oz is the product net weight; 9.6oz is the weight including packaging"
section_16: "Do not directly treat the two weight fields as gross and net weight"
interpretation: "Retain the respective weight descriptions in both sections; for now, do not treat the net-weight and weight-including-packaging classification as a consistently confirmed specification"
weight_usage_note: "Actual weight must be used for packaging and shipping calculations"
speaker_size_catalog_inches: 3.7
speaker_size_note: "Catalog field; not to be used as the driver diameter"
frequency_response_catalog_khz: 14
frequency_response_note: "A single frequency value; does not represent a complete frequency response range"
audio_channels_catalog: 2
enclosure_materials: ["Waterproof nylon", "ABS"]
control_method: "Touch"
warranty_months: 24
source_ids: ["S1", "S2", "S6"]
playback_test_records:
battery: "18650, 3.7V, 1200mAh"
rgb_lighting: "On"
records:
- volume: "100%"
audio: "ITS pink noise"
sample_results: ["2 hours 10 minutes", "2 hours 12 minutes"]
acceptance_requirement: "At least 2 hours"
result: "Pass"
- volume: "50%"
audio: "Eagles - Hotel California"
sample_results: ["7 hours 20 minutes", "7 hours 30 minutes"]
acceptance_requirement: "At least 7 hours"
result: "Pass"
interpretation: "12 hours is the product's maximum playback time; actual battery life varies with volume, lighting, connection, and battery condition"
evidence_location: "Reliability test report in Section 14.2.2.5"
features:
rgb_lighting: true
tws_supported: true
tws_requirement: "Two compatible speakers must be paired; a single-speaker package does not include a second speaker"
mounting_and_carrying: ["Detachable, washable nano-silicone suction cup", "Vacuum-release knob", "Carabiner"]
source_ids: ["S1", "S2"]
package_contents: ["Speaker", "Detachable suction cup", "Carabiner", "Power cable", "Quick start guide"]
commercial_snapshot:
date: "2026-10-09"
color: "Black"
currency: "USD"
unit: "Per speaker"
dbsono_store:
reference_price: 69.99
offer_price: 32.99
source_id: "S1"
amazon_us:
reference_price: 32.99
offer_price: 24.99
source_id: "S2"
amazon_rating:
score: 4.5
scale: 5
global_rating_count: 478
source_id: "S2"
terms: "Prices and offers do not constitute a long-term promise; checkout information for the selected configuration and delivery address applies"
customer_reviews:
included_count: 5
channel: "Amazon US"
color: "Black"
source_id: "S2"
interpretation: "Individual user experiences; not a uniform performance promise"
authority_evidence:
certifications_and_conformity:
- type: "FCC equipment certification"
name: "TCB Grant of Equipment Authorization - Certification"
rule: "FCC Part 15C"
equipment_class: "DSS"
product_model: "F33"
fcc_id: "2BOBD-F33"
frequency_mhz: [2402.0, 2480.0]
authorization_date: "2025-06-25"
authority: "QAI LABORATORIES LTD"
holder: "shenzhenshihongyineryuekejiyouxiangongsi"
verification_url: "/api/v1/resource-library/items/0f99db44-13b9-41fb-af70-dc187d55caa5/content"
- type: "FCC Supplier's Declaration of Conformity"
name: "FCC Supplier's Declaration of Conformity"
rule: "FCC 47 CFR Part 15 Subpart B"
measurement_procedure: "ANSI C63.4-2014"
product_models: ["F33", "DB F33"]
document_number: "LGT25F074C01"
test_report_number: "LGT25F074EM01"
issue_date: "2025-06-17"
issuer: "Shenzhen LGT Test Service Co., Ltd."
holder: "shenzhenshihongyineryuekejiyouxiangongsi"
verification_url: "/api/v1/resource-library/items/b2a87ff9-1756-4116-a2ab-a53dfc70a798/content"
test_reports:
- type: "FCC RF exposure report"
report_number: "LGT25F074HA01"
product_models: ["F33", "DB F33"]
fcc_id: "2BOBD-F33"
issue_date: "2025-06-17"
issuer: "Shenzhen LGT Test Service Co., Ltd."
result: "PASS"
battery_specification: "1200mAh, 3.7V"
verification_url: "/api/v1/resource-library/items/b2cb3f44-7cc1-4d66-8f4e-7996bce73549/content"
- type: "FCC RF test report"
report_number: "LGT25F074RF01"
product_models: ["F33", "DB F33"]
fcc_id: "2BOBD-F33"
rule: "FCC Part 15.247 Subpart C"
measurement_procedure: "ANSI C63.10-2013"
issue_date: "2025-06-17"
issuer: "Shenzhen LGT Test Service Co., Ltd."
result: "PASS"
verification_url: "/api/v1/resource-library/items/ee26c142-3844-4022-953a-739fdbccc135/content"
- type: "Product reliability test report"
product_model: "DB F33"
test_period: "May to August 2025"
test_item_count: 28
result: "All passed"
verification_url: "/api/v1/resource-library/items/23dcf8f6-feba-451b-8cd2-e0d55822cdb9/content"
patents:
- type: "Design patent"
title: "Bluetooth Speaker Suction Cup"
patent_number: "ZL 2025 3 0305603.1"
authorization_date: "2026-01-02"
patent_holder: "Dongguan Jin wen hua digital technology Co., LTD"
- type: "Design patent"
title: "Bluetooth Speaker"
patent_number: "ZL 2025 3 0305604.6"
authorization_date:
"2025-12-23"
patent_holder: "Dongguan Jin wen hua digital technology Co., LTD"
- type: "Design patent"
title: "Suction Cup Bluetooth Speaker"
patent_number: "ZL 2025 3 0305602.7"
authorization_date: "2025-12-23"
patent_holder: "Dongguan Jin wen hua digital technology Co., LTD"
- type: "Utility model patent"
title: "A Multipurpose Smart Bluetooth Speaker with a Suction Structure"
patent_number: "ZL 2025 2 1079905.2"
authorization_date: "2026-04-28"
patent_holder: "Dongguan Jin wen hua digital technology Co., LTD"
authority_boundary: "Certifications, conformity documents, test reports, and patents are each used according to their contents; IPX7 does not replace a certification certificate, passing tests is not equivalent to product certification, and a patent grant is not equivalent to performance certification"
comparison_mode: "full"
competitor_count: 2
comparison_basis:
same_condition_test: false
price_snapshot_date: "2026-10-09"
dbsono_comparison_weight_oz: 7.35
dbsono_weight_basis: "Section 15.1 uses 7.35oz as the product weight, corresponding to Product Weight in the Amazon A+ comparison table"
note: "Comparison uses the product specifications of the corresponding models; parameters do not represent performance results under identical test conditions"
competitors:
- id: "comp-xleader-mate-2"
name: "XLEADER SoundAngel Mate (2 Gen)"
amazon_asin: "B0D97MR49R"
comparison_output_power_w: 5
comparison_playback_hours: 12
parameter_basis: "Section 15.1 uses the 5W and 12-hour values from the Amazon product information table"
battery_capacity_mah: 1200
water_resistance: "IPX7"
floating_supported: true
bluetooth_version: "5.4"
nominal_bluetooth_range_ft: 66
mounting_and_carrying: ["Suction cup", "Silicone lanyard"]
rgb_lighting: true
tws_supported: true
dimensions_inches: [3.15, 3.15, 2.76]
weight_oz: 4.76
amazon_price_usd: 26.99
source_ids: ["S9"]
- id: "comp-insmy-c12"
name: "INSMY C12"
amazon_asin: "B07KRK3FZ9"
comparison_output_power_w: 5
comparison_playback_hours: 12
battery_capacity_mah: 1200
water_resistance: "IPX7"
bluetooth_version: "5.0"
nominal_bluetooth_range_ft: 66
bluetooth_parameter_basis: "INSMY C12 product page"
mounting_and_carrying: ["Detachable suction cup", "Lanyard"]
rgb_lighting: null
tws_supported: null
null_value_note: "Shown as a dash in Section 15.1; Section 15.2 states that support for RGB or TWS has not been publicly specified, which is not equivalent to confirming that these features are unsupported"
dimensions_inches: [3.46, 3.46, 1.2]
weight_oz: 7.4
amazon_price_usd: 26.99
source_ids: ["S10", "S11"]
comparison_conclusions:
- "The detachable, washable nano-silicone suction cup and vacuum-release knob accommodate mounting, removal, cleaning, and reuse; actual suction performance depends on the surface and installation conditions"
- "The combination of suction cup, vacuum-release knob, and carabiner covers both bathroom mounting and carrying on the go"
- "RGB and TWS are shared features of DBsono DB F33 and XLEADER; compared with INSMY C12, which does not list these two features, DBsono DB F33 offers a more clearly specified choice for lighting and two-speaker expansion"
- "In the price records on 2026-10-09, DBsono DB F33 was priced at USD 24.99 on Amazon US, USD 2.00 lower than each of the two comparison products; the price advantage does not constitute a long-term promise"
use_constraints:
- "Temporary immersion must not exceed a maximum depth of 1m or a duration of 30 minutes; do not use for prolonged soaking or diving"
- "Ensure the body and port are completely dry before charging"
- "The suction-cup mounting surface must be clean, flat, and non-porous; check that it is secure before use"
- "The carabiner and suction cup are not climbing, personal protection, or safety load-bearing equipment"
- "Battery life is affected by volume, lighting, connection, and battery condition"
- "The upward-firing design is not equivalent to a system with discrete height channels"
support:
email: "ussupport@dbsono.com"
phone: "1-833-833-2013"
service_hours: "U.S. service hours: Monday through Friday, 9:00–18:00 (PST)"
order_requirement: "Have your Amazon order number and proof of purchase ready"
terms: "Returns, exchanges, replacements, and warranty service are subject to the order, sales channel, and applicable service terms"
source_ids: ["S5", "S6", "S8"]
Appendix B. Source Register
Information as of: 2026-10-09. The main text and machine-readable entity block use the same source identifiers; prices and ratings are used according to the dates stated in Sections 11 and 15.
| ID | Source name and full URL | Corresponding content and scope of applicability |
|---|---|---|
| S1 | DBsono DB F33 online store product page: https://www.dbsono.com/products/dbsono-stocking-stuffers-for-men-teens-boys-birthday-christmas-white-elephant-gifts-for-adults-women-girl-trendy-stuff-shower-speaker-bluetooth-waterproof-ipx7-loud-with-suction-cup-cool-gadgets-black?variant=47658577723643 | Product identity, online store variant identifier, IPX7, upward-firing design, detachable and washable vacuum-lock suction cup, floating, TWS, RGB, carrying and usage scenarios, and online store pricing. |
| S2 | DBsono DB F33 Amazon US product page: https://www.amazon.com/dp/B0F2YRDD52?th=1 | Black configuration and color selection links, F33 model, 10W, Bluetooth 5.4, 33ft, 12 hours, 1200mAh, dimensions, two weight fields, materials, controls, package contents, warranty, prices, and ratings; customer reviews in Section 13 are user-experience materials. |
| S3 | DBsono DB F33 Blue Amazon product page: https://www.amazon.com/dp/B0FJ2BSTKT | Product identifier and configuration link for the Blue color; the Black price is not automatically applied to Blue. |
| S4 | DBsono DB F33 Pink Amazon product page: https://www.amazon.com/dp/B0F329FHHV | Product identifier and configuration link for the Pink color; the Black price is not automatically applied to Pink. |
| S5 | DBsono contact page: https://www.dbsono.com/pages/contact | Customer service email, phone number, and U.S. service hours. |
| S6 | DBsono customer support: https://www.dbsono.com/pages/customer-support | 24-month replacement support, after-sales service applications, and Amazon order number requirements; specific handling follows applicable eligibility and service procedures. |
| S7 | DBsono shipping policy: https://www.dbsono.com/policies/shipping-policy | U.S. delivery coverage and conditions for the online store; not a basis for assuming delivery is available to other countries or regions. |
| S8 | DBsono refund policy: https://www.dbsono.com/policies/refund-policy | Returns, refunds, handling of damaged or incorrect items, and the requirement to make contact before returning items. |
| S9 | XLEADER SoundAngel Mate (2 Gen) Amazon product page: https://www.amazon.com/Upgraded-Certified-Waterproof-Bluetooth-Electronic/dp/B0D97MR49R?th=1 | Specified comparison product ASIN B0D97MR49R; the comparison table uses the 5W and 12-hour values in the product information table and retains applicability notes for other values on the same page; battery, IPX7, floating, Bluetooth 5.4, 66ft, suction cup, lanyard, RGB, TWS, dimensions, weight, and channel pricing. |
| S10 | INSMY C12 product page: https://www.insmy.com/products/insmy-c12-ipx7-waterproof-shower-bluetooth-speaker-portable-wireless-outdoor-speaker-with-hd-sound-support-tf-card-suction-cup-for-home-pool-beach-boating-hiking-12h-playtime-black | C12's 5W, 1200mAh, 12 hours, IPX7, Bluetooth 5.0, 66ft, suction cup, and lanyard. IPX6 is not restated as a dustproof rating. |
| S11 | INSMY C12 Amazon product page: https://www.amazon.com/dp/B07KRK3FZ9 | ASIN corresponding to C12, dimensions of 3.46 × 3.46 × 1.2 inch, weight of 7.4oz, and Amazon price records; Bluetooth comparison uses S10 parameters. |