FCC ID 2BTWM-SMARTBUDS03B
TWS Wireless headset Charging Case
by Huaou Tonghui (Suzhou) Technology Co., Ltd.
Grantee Code: 2BTWM Product Code: SMARTBUDS03B
Latest application date: 2026-07-02
FCC ID Device Details
| FCC ID | 2BTWM-SMARTBUDS03B |
|---|---|
| Mirrors | fcc.id | gov | fccid.ai |
| Grantee Code | 2BTWM |
| Product Code | SMARTBUDS03B |
| Applicant Business | Huaou Tonghui (Suzhou) Technology Co., Ltd. 🇨🇳 |
| Related Domains |  hothsz.com |
| Equipment Class | TWS Wireless headset Charging Case |
| Test Firm | Guangdong DN Testing Co., Ltd. |
Operating Frequencies
| Frequency Range | Application Purpose | Final Action Date |
|---|---|---|
| 2402-2480 MHz | Class II permissive change or modification of presently authorized equipment | 2026-07-02 |
| 2402-2480 MHz | Original Equipment | 2026-01-09 |
Exhibits
| Document | Type | Available | File |
|---|---|---|---|
| Users_Manual | Users Manual | 2026-07-02 | PDF 946.7 KB |
| User manual | Users Manual | 2026-01-09 | PDF 464.6 KB |
| Internal Photos | Internal Photos | 2026-07-02 | PDF 2 MB |
| Internal Photos | Internal Photos | 2026-01-09 | PDF 1 MB |
| External Photos | External Photos | 2026-07-02 | PDF 1.4 MB |
| External Photos | External Photos | 2026-01-09 | PDF 719.5 KB |
| Label and location | ID Label/Location Info | 2026-07-02 | PDF 176.3 KB |
| Test Setup photo | Test Setup Photos | 2026-07-02 | PDF 571.3 KB |
| Test Setup photo | Test Setup Photos | 2026-01-09 | PDF 572.7 KB |
| DNT2605263027R05964-07066-FCC BT Test Report_Part1 | Test Report | 2026-07-02 | PDF 5.8 MB |
| DNT2605263027R05964-07066-FCC BT Test Report_Part2 | Test Report | 2026-07-02 | PDF 5.2 MB |
| Antenna specification | Test Report | 2026-01-09 | PDF 518.5 KB |
| FCC BT Test Report_Part1 | Test Report | 2026-01-09 | PDF 6 MB |
| FCC BT Test Report_Part2 | Test Report | 2026-01-09 | PDF 4.9 MB |
| USA-CoveredEquipmentLetter-Combined_V1.1 | Attestation Statements | 2026-07-02 | PDF 125.8 KB |
| USA-LocalRepLetter_V1.1 -2BTWM-SMARTBUDS03B | Attestation Statements | 2026-07-02 | PDF 283.6 KB |
| USA-CoveredEquipmentLetter-Combined_V1.1 | Attestation Statements | 2026-01-09 | PDF 126 KB |
| USA-LocalRepLetter_V1.1 - 2BTWM-SMARTBUDS03B | Attestation Statements | 2026-01-09 | PDF 478.4 KB |
| Declaration Letter of Model Difference | Cover Letter(s) | 2026-07-02 | PDF 90.2 KB |
| FCC Class II Permissive Change Application Letter | Cover Letter(s) | 2026-07-02 | PDF 298.8 KB |
| USA-ConfidentialityRequestLetter_V0.1 | Cover Letter(s) | 2026-07-02 | PDF 106.8 KB |
| USA-ConfidentialityRequestLetter_V0.1 | Cover Letter(s) | 2026-01-09 | PDF 104.4 KB |
| DNT2605263027R05964-07064-FCC MPE(Portable) Report | RF Exposure Info | 2026-07-02 | PDF 994.8 KB |
| FCC MPE(Portable) Report | RF Exposure Info | 2026-01-09 | PDF 1.1 MB |
| Block Diagram Metadata only | Block Diagram | PDF 48.5 KB | |
| Schematic Metadata only | Schematics | PDF 57.8 KB | |
| Schematic Metadata only | Schematics | PDF 43.9 KB | |
| Operation Description - BT Metadata only | Operational Description | PDF 93.2 KB | |
| USA-DueDigilenceLetter_V0.1 Metadata only | Operational Description | PDF 161.3 KB | |
| USA-DueDigilenceLetter_V0.1 Metadata only | Operational Description | PDF 92.7 KB |
Application Information
| Application ID | /En1fB0XOEZFBoPj1TkokA== |
|---|---|
| Final Action Date | 2026-07-02 |
| Application Purpose | Class II permissive change or modification of presently authorized equipment |
| Applicant FRN | 0037786423 |
| Model | SMARTBUDS03B |
| Frequency Range | 2402-2480 MHz |
| Equipment Class | DSS - Part 15 Spread Spectrum Transmitter |
| Device Description | TWS Wireless headset Charging Case |
| Responsible Party | Songwei Xu, 017@hothsz.com , 15625501563 |
| Non-Technical Contact | Cindy Wu, HOORAY INDUSTRY LLC, cindynewhope@gmail.com  , (626) 910-5808 |
| Test Firm | Joise Yang, Guangdong DN Testing Co., Ltd., Joise.yang@dn-testing.com  , +86-0769-8808 7383 |
| TCB Email | o.kneip@kl-certification.de  |
| TCB Scope | A4: UNII devices & low power transmitters using spread spectrum techniques |
| Short-Term Confidentiality | No |
| Long-Term Confidentiality | Yes |
| Modular Equipment | Does not apply |
| Composite Device | No |
| Cognitive Radio | No |
| Authorization Waiver | No |
| Authorization Waiver Approved | No |
| Section 5301 Certification | Yes |
| Related OET Knowledge DataBase Inquiry | No |
Applications
| Application ID | Date | Purpose |
|---|---|---|
| /En1fB0XOEZFBoPj1TkokA== | 2026-07-02 | Class II permissive change or modification of presently authorized equipment |
| f3kbNpMz0aVfXqkXTevkfQ== | 2026-01-09 | Original Equipment |
Equipment Authorization
| Frequency | Output | Rules |
|---|---|---|
| 2402-2480 MHz | 0.002 | 15C |
Grants
TCB Grant - Application f3kbNpMz0aVfXqkXTevkfQ==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
KL-Certification GmbH Heinrich-Hertz-Allee 7 St. Ingbert, 66386 Germany |
Date of Grant: 01/09/2026 Application Dated: 01/09/2026 |
| Huaou Tonghui (Suzhou) Technology Co., Ltd. |
| No.299,Shengxin Road,Bache,Dongtaihu |
| Ecological Tourist Resort(Taihu New City) |
| Wujiang District,Suzhou City, China |
| Attention: Songwei Xu , |
| NOT TRANSFERABLE |
| EQUIPMENT AUTHORIZATION is hereby issued to the named GRANTEE, and is VALID ONLY for the equipment identified hereon for use under the Commission's Rules and Regulations listed below. |
| FCC IDENTIFIER: | 2BTWM-SMARTBUDS03B |
| Name of Grantee: | Huaou Tonghui (Suzhou) Technology Co., Ltd. |
| Equipment Class: | Part 15 Spread Spectrum Transmitter |
| Notes: | TWS Wireless Headset Charging Case |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| 15C | 2402.0 - 2480.0 | 0.002 |
| Output Power listed is peak conducted. |
TCB Grant - Application /En1fB0XOEZFBoPj1TkokA==
| TCB | GRANT OF EQUIPMENT AUTHORIZATION |
TCB |
| Certification | ||
| Issued Under the Authority of the | ||
| Federal Communications Commission | ||
| By: |
|
KL-Certification GmbH Heinrich-Hertz-Allee 7 St. Ingbert, 66386 Germany |
Date of Grant: 07/02/2026 Application Dated: 07/02/2026 |
| Huaou Tonghui (Suzhou) Technology Co., Ltd. |
| No.299,Shengxin Road,Bache,Dongtaihu |
| Ecological Tourist Resort(Taihu New City) |
| Wujiang District,Suzhou City, China |
| Attention: Songwei Xu , |
| NOT TRANSFERABLE |
| EQUIPMENT AUTHORIZATION is hereby issued to the named GRANTEE, and is VALID ONLY for the equipment identified hereon for use under the Commission's Rules and Regulations listed below. |
| FCC IDENTIFIER: | 2BTWM-SMARTBUDS03B |
| Name of Grantee: | Huaou Tonghui (Suzhou) Technology Co., Ltd. |
| Equipment Class: | Part 15 Spread Spectrum Transmitter |
| Notes: | TWS Wireless headset Charging Case |
| Grant Notes | FCC Rule Parts | Frequency Range (MHZ) | Output Watts | Frequency Tolerance | Emission Designator |
| 15C | 2402.0 - 2480.0 | 0.002 |
| Output Power listed is peak conducted. CIIPC as screen has been changed. |