2A7J4-QWS20Wireless Audio System

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: Oasis Compliance, Inc./JIANMIN HE FRN: 0033464157 Contact Name: James He Address: 3313 Verdi Dr, San Jose, CA 95111 Telephone No: (202)602-8330 Email: [email protected] Applicant: Company name: Changsha Sonicake Technology Co., Ltd. FRN: 0032570772 Product Description: Wireless Audio System Grantee code: 2A7J4 FCC ID: 2A7J4-QWS20 Contact Name: Feng Qian Address: Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone, Changsha City, Hunan Province, P.R China Telephone No: 0731-88710800 Email: [email protected] [Changsha Sonicake Technology Co., Ltd.] certifies that, as of the date of this filing of the application with the TCB, [Oasis Compliance, Inc./JIANMIN HE] is our designated US agent for service of process for the above referenced FCC ID. [Changsha Sonicake Technology Co., Ltd.] accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any commission related proceeding involving equipment. [Oasis Compliance, Inc./JIANMIN HE] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 07.08.2026 Applicant’s Name: Feng Qian US Agent’s Name: James He Title: general manager Title: Global Market Access Manager Signature Signature

Attestation Statement. Old Code: C5266091 24 New Code: 00015544 Ed.3 Change reason: FRN is added to the Applicant information section. 1/1 TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Changsha Sonicake Technology Co., Ltd. Grantee code: 2A7J4 FCC ID: 2A7J4-QWS20 FRN: 0032570772 Contact Name: Feng Qian Address: Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone, Changsha City, Hunan Province, P.R China Telephone No: 0731-88710800 Fax No: Email: [email protected] i. [Changsha Sonicake Technology Co., Ltd.] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. The applicant must sign this certification. ii. [Changsha Sonicake Technology Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. Changsha Sonicake Technology Co., Ltd. certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Date: 07.08.2026 Applicant’s Name: Feng Qian Title: general manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

Changsha Sonicake Technology Co., Ltd. Code 00018768 Ed. 2 Item 1. The device is able to install software/program installation? ☐ Yes, go to Item 2. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky cybersecurity or anti-virus software. Item 2. Technical Requirements for Kaspersky Cybersecurity Software: # General Requirements (For all Devices) Yes / No or N/A Comments 1 Internet connection for activation and updates (For all Operating Systems) N/A Device Wireless Audio System Company name Changsha Sonicake Technology Co., Ltd. Grantee code 2A7J4 FCC ID 2A7J4-QWS20 FRN 0032570772 Contact name Feng Qian Address Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone, Changsha City, Hunan Province, P.R China Telephone number 0731-88710800 E-mail [email protected] Chipset/module information KT1801 Operating System (if applicable) N/A Storage Capacity (hard drive or other permanent memory storage, if applicable) N/A 2 # General Requirements (For Windows Devices) Yes / No or N/A Comments 1 Storage: 1500 MB free space on the hard drive N/A 2 Operating System: Microsoft Windows 8, 8.1, 10 & 11 Home / Pro / Enterprise Microsoft Windows 7 Starter / Home Basic & Premium / Professional / Ultimate SP1 or higher N/A 3 Processor: 1 GHz or higher (x86 or x64) N/A 4 Memory (RAM)1 GB (32-bit) or 2 GB (64-bit) N/A 5 Screen Resolution: Minimum resolution of 1024 x 768 N/A # General Requirements (For macOS devices) Yes / No or N/A Comments 1 Operating System macOS® 13 – 14 N/A 2 Memory (RAM)4 GB N/A 3 Storage: 3455 MB free space on the hard drive N/A # General Requirements (For Android Devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: Android™ 10 – 14 N/A 3 Screen Resolution: Minimum resolution of 320 x 480 N/A # General Requirements (for iOS devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: iOS® 17 N/A 3 # General Requirements (For Linux system) Yes / No or N/A Comments 1 Hard drive: 1 GB of free space N/A 2 CPU: Intel Pentium 1 GHz or higher N/A 3 RAM: 1 GB N/A 4 Minimum software requirements: AlmaLinux OS 8 or later; AlterOS 7.5 or later; Astra Linux Common Edition 2.12 or later; CentOS 6.7 or later; Debian GNU/Linux 10.0 or later; EulerOS 2.0 or later; Oracle Linux 7.3 or later ; Red Hat Enterprise Linux 6.7 or later ; Rocky Linux 8.5 or later ; SUSE Linux Enterprise Server 12.5 or later; Ubuntu 12.04 or later ; Uncom OS Home / Business / Education / Enterprise 2.2 or later; ALT Linux Workstaton / Workstation K / Server / Education 8 or later; ROSA Linux Workstation / Server 12 or later ; RED OS 7.3 and later ; N/A After reviewed the technical requirements, is the device capable of supporting the installation of Kaspersky software? ☐ Yes, go to Item 3. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky software 4 Item 3. Connectivity Capabilities: # Physical Interface Purpose Justification 1 1 # Wireless Interface Purpose Justification 1 1 After the review of this items, the device: ☒ Cannot support installation of any cybersecurity or anti-virus software on the covered list. ☐ Potentially can operate with any cybersecurity or anti-virus software on the covered list – additional third- party proof is provided to demonstrate compliance with requirements as of 2.911(d)5(i),(ii) – “Proof of Compliance with Covered List Software Requirements” of this document applies Signature: Name: Feng Qian Date: 7/8/2026 1 The justification field is used to justify why the software cannot be received through that interface. Check the annex for more indications.

TCB CALL página 1 File FCC ID: 2A7J4-QWS20 Please upload an exhibit that explains how does the TCB verify the new agent information: 1- Is the address of the agent a valid physical US mailing address (not a US post office box, not a virtual mailbox, not P.O. Boxes, not a vacant lot, not a public building, etc.) ○ We have checked if the address exists in a real and potential building (Google maps) + official US register, after this verification and the evidence below we can guarantee the following: not a US post office box not a virtual mailbox not P.O. Boxes not a vacant lot not a public building(note) ► We checked the FCC FRN Search based on the information provided by the grantee. On the official register from CALIFORNIA: https://www.sanjoseca.gov/your-government/departments-offices/finance/business-tax-registration/business-tax-lookup TCB CALL página 2 In google: However after deeply investigate I could see: TCB CALL página 3 ► CONCLUSION by TCB: The ASOP defined and provided by grantee is VALID and confirmed. Therefore the exhibit "C5266091_X23_Ed1_US_Agent_Letter" included in the file is ok. 2- Is the agent physically located at that valid US address such that the agent can be legally served at that address? Yes , check above 3- Has the listed agent clearly agreed in writing to serve as the agent for the grantee at that address? Yes, it is included in the exhibit " C5266091_X23_Ed1_US_Agent_Letter " >

C5266091_X10_Ed.2 1/1 Changsha Sonicake Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 7/8/2026 Subject: Request for Confidentiality FCC ID: 2A7J4-QWS20 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☐ Internal Photos ☐ NOTE 1 ☐ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒☐ Cover Letter(s) No No SDR Software / Security Info ☒ No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ______ days from the date of the Grant of Equipment Authorization and prior to marketing. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. C5266091_X10_Ed.2 1/1 Sincerely, Signature: Name: Feng Qian Title: general manager

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Changsha Sonicake Technology Co., Ltd. Address: Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone, Changsha City, Hunan Province, P.R China Product Name: Wireless Audio System Model Number: QWS-20 FCC Identifier: 2A7J4-QWS20 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Feng Qian Date: 7/8/2026 Title: general manager Signature of applicant:

C5266091_X13_Ed.1 1/1 Changsha Sonicake Technology Co., Ltd. FCC Software Configuration Control Declaration Date: July 21, 2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attn: OET Dept. Product/ Model Number: Wireless Audio System/ QWS-20 FCC ID: 2A7J4-QWS20 Regarding FCC Country Code Selection guidelines identified in KDB 594280. “All applications for equipment authorization for transmitters that can have radio parameters, or other technical parameters, reported to the Commission set by software must have an attestation indicating that no third party will have software, or configuration control, to program the device out of compliance of the technical rules under which it has been certified.” We declare that no third party will have software, or configuration control, to program the device out of compliance of the technical rules under which it has been certified. Signature of applicant Name: Feng Qian Title: general manager

Page 1 of 4 Report No.: MTi260123003-0107 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected] Photographs of the EUT (External Photos) Model: QWS-20 Page 2 of 4 Report No.: MTi260123003-0107 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected] Page 3 of 4 Report No.: MTi260123003-0107 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected] Page 4 of 4 Report No.: MTi260123003-0107 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected]

Page 1 of 2 Report No.: MTi260123003-0107 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected] Photographs of the EUT (Internal Photos) Model: QWS-20 Page 2 of 2 Report No.: MTi260123003-0107 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected] TX ANT

Tel:0755-88850135-1439 Mobile: 131-4343-1439（Wechat same number） Web: http://www.mtitest.cn E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong,China Q/MTI-QP-12-FE038 Ver./Rev.：A1 Page 1 of 6 RF EXPOSURE Test Report Report No. : MTi260123003-0107E2 Date of issue : 2026-07-23 Applicant : Changsha Sonicake Technology Co., Ltd. Product : Wireless Audio System Model(s) : QWS-20 FCC ID : 2A7J4-QWS20 Shenzhen Microtest Co., Ltd. TEST REPORT Report No.: MTi260123003-0107E2 Tel:0755-88850135-1439 Mobile: 131-4343-1439（Wechat same number） Web:http://www.mtitest.cn E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong,China Q/MTI-QP-12-FE012 Ver./Rev.：A1 Page 2 of 6 Table of contents 1 Standalone SAR test exclusion considerations ............................................................... 4 2 SAR Test Exclucsion Thresholds ....................................................................................... 5 TEST REPORT Report No.: MTi260123003-0107E2 Tel:0755-88850135-1439 Mobile: 131-4343-1439（Wechat same number） Web:http://www.mtitest.cn E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong,China Q/MTI-QP-12-FE012 Ver./Rev.：A1 Page 3 of 6 Test Result Certification Applicant Changsha Sonicake Technology Co., Ltd. Applicant Address Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone Changsha City, Hunan Province, P.R. China. Manufacturer Changsha Sonicake Technology Co., Ltd. Manufacturer Address Room 1601, Building 1, No.20 Qingshan Road, Dongfanghong Street, Xiangjiang New Area, Hunan, China Factory ZHUHAI BOINAUDIO TECHNOLOGY Co., Ltd. Factory Address 2/F, Building 2(Phase 2 Factory Building), No. 321, Pingbei 1st Road, Nanping, Xiangzhou District, Zhuhai City, Guangdong Province, China. Product description Product name Wireless Audio System Trademark Sonicake Model name QWS-20 Series Model(s) N/A Standards 47 CFR Part 2.1093 Test method KDB 447498 D01 v06 Testing Information Date of test 2026-04-02 to 2026-07-22 Test Result Pass Prepared by: Yanice Xie Reviewed by: David Lee Approved by: Lewis Lian TEST REPORT Report No.: MTi260123003-0107E2 Tel:0755-88850135-1439 Mobile: 131-4343-1439（Wechat same number） Web:http://www.mtitest.cn E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong,China Q/MTI-QP-12-FE012 Ver./Rev.：A1 Page 4 of 6 1 Standalone SAR test exclusion considerations Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions. The minimum test separation distance defined in 4.1 f) is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander. To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified, typically in the SAR measurement or SAR analysis report, by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting are required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions. a) For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where ⚫ f (GHz) is the RF channel transmit frequency in GHz ⚫ Power and distance are rounded to the nearest mW and mm before calculation ⚫ The result is rounded to one decimal place for comparison ⚫ The values 3.0 and 7.5 are referred to as numeric thresholds in step b) below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm, and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to 4.1 f) is applied to determine SAR test exclusion. b) For 100 MHz to 6 GHz and test separation distances > 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following (also illustrated in Appendix B): 1) {[Power allowed at numeric threshold for 50 mm in step a)] + [(test separation distance – 50 mm)·(f(MHz)/150)]} mW, for 100 MHz to 1500 MHz 2) {[Power allowed at numeric threshold for 50 mm in step a)] + [(test separation distance – 50 mm)·10]} mW, for > 1500 MHz and ≤ 6 GHz c) For frequencies below 100 MHz, the following may be considered for SAR test exclusion (also illustrated in Appendix C): 1) For test separation distances > 50 mm and < 200 mm, the power threshold at the corresponding test separation distance …

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Tel:0755-88850135-1439 Mobile: 131-4343-1439（Wechat same number） Web: http://www.mtitest.cn E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong,China Q/MTI-QP-12-FE038 Ver./Rev.：A1 Page 1 of 55 Test Report Report No. : MTi260123003-0107E1 Date of issue : 2026-07-23 Applicant : Changsha Sonicake Technology Co., Ltd. Product : Wireless Audio System Model(s) : QWS-20 FCC ID : 2A7J4-QWS20 Shenzhen Microtest Co., Ltd. TEST REPORT Report No.: MTi260123003-0107E1 Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong,China Q/MTI-QP-12-FE038 Ver./Rev.：A1 Page 2 of 55 Table of contents 1 General Description .................................................................................................................... 4 1.1 Description of the EUT ....................................................................................................... 4 1.2 Description of test modes .................................................................................................. 4 1.3 Environmental Conditions .................................................................................................. 6 1.4 Description of support units ............................................................................................... 6 1.5 Measurement uncertainty .................................................................................................. 6 2 Summary of Test Result ............................................................................................................. 7 3 Test Facilities and accreditations .............................................................................................. 8 3.1 Test laboratory ................................................................................................................... 8 4 List of test equipment ................................................................................................................ 9 5 Radio Spectrum Matter Test Results (RF) .............................................................................. 11 5.1 Duty Cycle ....................................................................................................................... 11 5.2 Emission bandwidth and occupied bandwidth ................................................................. 12 5.3 Maximum conducted output power .................................................................................. 14 5.4 Power spectral density ..................................................................................................... 15 5.5 Frequency stability ........................................................................................................... 16 5.6 Band edge emissions (Radiated) ..................................................................................... 17 5.7 Undesirable emission limits (below 1GHz) ...................................................................... 24 5.8 Undesirable emission limits (above 1GHz) ...................................................................... 29 Photographs of the test setup ........................................................................................................ 38 Photographs of the EUT.................................................................................................................. 39 Appendix A1: Occupied channel bandwidth ............................................................................... 41 Appendix A2: Min emission bandwidth ....................................................................................... 44 Appendix B: Duty Cycle .................................................................................................................. 47 Appendix C: Maximum conducted output power ......................................................................... 50 Appendix D: Maximum power spectral density ............................................................................ 52 Appendix G: Frequency Stability ................................................................................................... 54 TEST REPORT Report No.: MTi260123003-0107E1 Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong,China Q/MTI-QP-12-FE038 Ver./Rev.：A1 Page 3 of 55 Test Result Certification Applicant Changsha Sonicake Technology Co., Ltd. Applicant Address Room 601A16, Enterprise Building, Hunan University Science Park, No.186, Guyuan Road, High-tech Zone Changsha City, Hunan Province, P.R. China. Manufacturer Changsha Sonicake Technology Co., Ltd. Manufacturer Address Room 1601, Building 1, No.20 Qingshan Road, Dongfanghong Street, Xiangjiang New Area, Hunan, China Factory ZHUHAI BOINAUDIO TECHNOLOGY Co., Ltd. Factory Address 2/F, Building 2(Phase 2 Factory Building), No. 321, Pingbei 1st Road, Nanping, Xiangzhou District, Zhuhai City, Guangdong Province, China. Product description Product name Wireless Audio System Trademark Sonicake Model name QWS-20 Series Model(s) N/A Standards 47 CFR Part 15E Test Method KDB 789033 D02 General UNII Test Procedures New Rules v02r01 ANSI C63.10-2020 + Cor. 1-2023+C63.10a-2024 + Errata to C63.10a-2024 Testing Information Date of test 2026-04-02 to 2026-07-22 Test result Pass Prepared by: Yanice Xie Reviewed by: David Lee Approved by: Lewis Lian TEST REPORT Report No.: MTi260123003-0107E1 Tel: 0755-88850135-1439 Mobile: 131-4343-1439 (Wechat same number) Web: http://www.mtitest.cn E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park,…

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ACX Advanced Ceramic X Features v Monolithic SMD with small, low-profile and light-weight type. v Wide bandwidth Applications v5~6GHz wireless communication system Specifications Part Number Frequency Range (MHz) Peak Gain (XZ-V) Average Gain (XZ-V) VSWR Impedance AT3216 -B5R5HAA_ 5150~5875 2.0 dBi typ. -2.5 dBi typ. 2 max. 50 Ω Q’ty/Reel (pcs) : 3,000 pcs Operating Temperature Range : -40 ~ +85 o C Storage Temperature Range : -40 ~ +85 o C Power Capacity : 500mW max. Part Number Å Type AT : Antenna Ç Dimensions ( L × W ) 3.2× 1.6 mm É Material Code B Ñ Frequency Range 5R5=5500MHz Ö Specification Code HAA Ü Packaging T: Tape & Reel B: Bulk Terminal Configuration No. Terminal Name No. Terminal Name Å Feeding Point Ç NC AT3216 Series Multilayer Chip Antenna AT 3216 - B 5R5 HAA p ÅÇ ÉÑÜÖ Å Ç ACX Advanced Ceramic X * 2.6 4.2 1.6 1.9 0.4 * 2.6 4.2 1.6 1.9 0.4 Dimensions and Recommended PC Board Pattern Mark L W T a Dimensions 3.20.2 1.60.2 1.3+ 0.1/-0.2 0.50.3 (a) Without Matching Circuits 0 0 (b) With Matching Circuits 0 0 2.2nH *Line width should be designed to match 50Ω characteristic impedance, depending on PCB material and thickness. Unit : mm L W a T ACX Advanced Ceramic X Typical Electrical Characteristics (T=25 o C) vTest Board vReturn Loss (a) Without Matching Circuits (b) With Matching Circuits 33.5mm 6.5mm 19mm Matching Circuit Antenna No Ground Ground 50Ω Feed Line 39.5mm 6.5mm ACX Advanced Ceramic X Radiation Patterns 180 o 270 o 0 o 90 o X Z Y XY-cut scanning direction XY-V/XY-H XY cut @5.5GHz Vertical Horizontal Advanced Ceramic X Corp. 16 Tzu Chiang Road, Hsinchu Industrial District Hsinchu Hsien 303, Taiwan TEL:886-3-5987008 FAX:886-3-5987001 E-mail: [email protected] http://www.acxc.com.tw

Page1of2ReportNo.:MTi260123003-0107 Address:101,No.7,Zone2,XinxingIndustrialPark,FuhaiAvenue,XinheCommunity,FuhaiStreet,Bao’anDistrict,Shenzhen,Guangdong,China. Tel:0755-88850135-1439Mobile:131-4343-1439(Wechatsamenumber)Web:http://www.mtitest.cnE-mail:[email protected] Photographsofthetestsetup Model:QWS-20 Radiatedemission(above1GHz) Radiatedemission(below1GHz) Page2of2ReportNo.:MTi260123003-0107 Address:101,No.7,Zone2,XinxingIndustrialPark,FuhaiAvenue,XinheCommunity,FuhaiStreet,Bao’anDistrict,Shenzhen,Guangdong,China. Tel:0755-88850135-1439Mobile:131-4343-1439(Wechatsamenumber)Web:http://www.mtitest.cnE-mail:[email protected] RFTest