2BRRX-MJH-D001BHome Bluetooth Speaker

Rev 1/26/2023 (Huizhou Zhengcheng Audio Co., Ltd.) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: April 30, 2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing (FCC ID: 2BRRX-MJH-D001B) [Huizhou Zhengcheng Audio 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. [Huizhou Zhengcheng Audio Co., Ltd.] (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, (Applicant signature) (Applicant printed name) zaiying ou Title: Manager Rev 1/26/2023 (Huizhou Zhengcheng Audio Co., Ltd.) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: April 30, 2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing (FCC ID: 2BRRX-MJH-D001B) [Huizhou Zhengcheng Audio Co., Ltd.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) zaiying ou Title: Manager

Huizhou Zhengcheng Audio Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: April 28, 2026 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID or Grantee Code: FCC ID:2BRRX-MJH-D001B Applicant FRN: 0037412863 HOPEK CORPORATION [Huizhou Zhengcheng Audio Co., Ltd.](“the applicant”) certifies that, as of the date of the filing of the application, HOPEK CORPORATION INCis our designated U.S. agent for service of process for the above referenced FCC ID. [Huizhou Zhengcheng Audio 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 the equipment. INC accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Name: HOPEK CORPORATION INC U.S. Agent FRN: 0034562900 Address: 16755 Coyote Bush Dr Unit 84, San Diego, CA 92127 United States Contact Person: Yangyang Xu Tel.: 561-875-9826 Email: [email protected] Sincerely, Huizhou Zhengcheng Audio Co., Ltd. HOPEK CORPORATION INC zaiying ou / Manager Yangyang Xu / Manager (sign) (sign)

Huizhou Zhengcheng Audio Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Date: April 28, 2026 SUBJECT: FCC Application for FCC ID: 2BRRX-MJH-D001B To Whom It May Concern: We, the undersigned, hereby authorize Colin Huang at Shenzhen DACE Testing Technology Co., Ltd. on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Shenzhen DACE Testing Technology Co., Ltd. on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, Sincerely, (signature) Name: zaiying ou Title: Manager

Huizhou Zhengcheng Audio Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: April 30, 2026 Confidentiality Request regarding application for certification of FCC ID: 2BRRX-MJH-D001B Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type Block Diagram Operational Description Schematics The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Pursuant to DA04-1705 June 15, 2004 of the Commission’s public notice, we also request temporary confidential treatment of information accompanying this application as outlined below: Exhibit Type Sincerely, (signature) Name: zaiying ou Title: Manager

Label Location: Home Bluetooth Speaker Model: MJH-D001B FCC ID: 2BRRX-MJH-D001B FCC WARNING: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Huizhou Zhengcheng Audio Co., Ltd. FCC ID: 2BRRX-MJH-D001B Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. EDR: Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion 2.402 4.9 3.095±16.003.98<51.234003.00YES 2.441 4.3 2.694±15.003.16<50.988133.00YES 2.480 3.71 2.354±15.003.16<50.995993.00YES 2.402 5.48 3.535±16.003.98<51.234003.00YES 2.441 4.91 3.105±16.003.98<51.243983.00YES 2.480 4.4 2.755±16.003.98<51.253883.00YES 2.402 5.82 3.826±17.005.01<51.553523.00YES 2.441 5.1 3.245±16.003.98<51.243983.00YES 2.480 4.64 2.915±16.003.98<51.253883.00YES GFSK (π /4)DQPS K 8DPSK Conclusion: For the max result: 1.55352 Limit 3.0 for 1g SAR.

V1.0Report No.: DACE260319004RL001 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Web: http://www.dace-lab.comTel: +86-755-23010613E-mail: [email protected] 1 of 106 RF TEST REPORT For Huizhou Zhengcheng Audio Co., Ltd. Product Name: Home Bluetooth Speaker Test Model(s): MJH-D001B Report Reference No.:DACE260319004RL001 FCC ID:2BRRX-MJH-D001B Applicant’s Name: Huizhou Zhengcheng Audio Co., Ltd. Address: Intercontinental Industrial Park, Luoyang Street, Boluo County, Huizhou City Testing Laboratory: Shenzhen DACE Testing Technology Co., Ltd. Address: 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Test Specification Standard:47 CFR Part 15.247 Date of Receipt: March 19, 2026 Date of Test: March 19, 2026 to April 2, 2026 Date of Issue: April 2, 2026 Result:Pass Note: This report shall not be reproduced except in full, without the written approval of Shenzhen DACE Testing Technology Co., Ltd . This document may be altered or revised by Shenzhen DACE Testing Technology Co., Ltd . personnel only, and shall be noted in the revision section of the document. The test results in the report only apply to the tested sample V1.0Report No.: DACE260319004RL001 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Web: http://www.dace-lab.comTel: +86-755-23010613E-mail: [email protected] 2 of 106 Apply for company information Applicant’s Name: Huizhou Zhengcheng Audio Co., Ltd. Address: Intercontinental Industrial Park, Luoyang Street, Boluo County, Huizhou City Product Name: Home Bluetooth Speaker Test Model(s): MJH-D001B Test Specification Standard(s): 47 CFR Part 15.247 NOTE1: The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in this report. If the product in this report is used in any configuration other than that detailed in the report, the manufacturer must ensure the new system complies with all relevant standards. Compiled by:Supervised by:Approved by: Lucy Mo / Test EngineerArron Liu / Project EngineerTom Chen / Manager April 2, 2026April 2, 2026April 2, 2026 V1.0Report No.: DACE260319004RL001 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Web: http://www.dace-lab.comTel: +86-755-23010613E-mail: [email protected] 3 of 106 Revision History Of Report VersionDescriptionREPORT No.Issue Date V1.0OriginalDACE260319004RL001April 2, 2026 V1.0Report No.: DACE260319004RL001 102, Building H1, & 1/F., Building H, Hongfa Science & Technology Park, Tangtou Community, Shiyan Subdistrict, Bao'an District, Shenzhen, Guangdong, China Web: http://www.dace-lab.comTel: +86-755-23010613E-mail: [email protected] 4 of 106 CONTENTS 1澳TEST SUMMARY...........................................................................................................................................6澳 1.1澳TEST STANDARDS..................................................................................................................................6澳 1.2澳SUMMARY OF TEST RESULT....................................................................................................................6澳 2澳GENERAL INFORMATION............................................................................................................................8澳 2.1澳CLIENT INFORMATION.............................................................................................................................8澳 2.2澳DESCRIPTION OF DEVICE (EUT)..............................................................................................................8澳 2.3澳DESCRIPTION OF TEST MODES................................................................................................................8澳 2.4澳DESCRIPTION OF SUPPORT UNITS...........................................................................................................8澳 2.5澳OPERATION FREQUENCY EACH OF CHANNEL............................................................................................9澳 2.6澳EQUIPMENTS USED DURING THE TEST..................................................................................................10澳 2.7澳STATEMENT OF THE MEASUREMENT UNCERTAINTY...............................................................................12澳 3澳EVALUATION RESULTS (EVALUATION)...................................................................................................13澳 3.1澳ANTENNA REQUIREMENT.......................................................................................................................13澳 3.1.1澳Conclusion:.............................................................................................................................13澳 4澳RADIO SPECTRUM MATTER TEST RESULTS (RF).................................................................................14澳 4.1澳CONDUCTED EMISSION AT AC POWER LINE...........................................................................................14澳 4.1.1澳E.U.T. Operation:....................................................................................................................14澳 4.1.2澳Test Setup Diagram:...............................................................................................................14澳 4.1.3澳Test Data:...............................................................................................................................15澳 4.2澳20DB BANDWIDTH................................................................................................................................17澳 4.2.1澳E.U.T. Operation:.............................................................…

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Huizhou Zhengcheng Audio Co., Ltd. 项目： Project: MJH-D001B 料号： P/N: S71-8730 日期： Date: 2024.12.07 Structure Examine Approver 地址： Address: Intercontinental Industrial Park, Luoyang Street, Boluo County, Huizhou City Bin WUXiao Xiao Li CHEN KAI Test items equipment 1.S- parameter 1. Return Loss 2. VSWR network analyzer : Agilent E5071B HP 8753D 2.Active 1. Transmissionpower（TRP） 2. Receiving sensitivity（TIS） 1. Darkroom：ETS 7x4x3 m (3D) Chamber ETS 5x3x3 m (3D) Chamber 2.network analyzer : Agilent 8960 E5515B 3.Passive 1. Antenna gain 2. Antenna efficiency 1. DarkroomETS 7x4x3 m (3D) Chamber ETS 5x3x3 m (3D) Chamber 2. network analyzer ：Agilent E5071B HP 8753D ITEM ANT SPEC Model Name 2.4G ANT Center Frequency Horizontal Vertical 2400MHz 2400MHz 2500MHz 2400MHz 2400MHz 2500MHz -1.26-0.76-0.58-5.25-2.46-1.86 MAX. Gain -0.58dBi Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance 50 Ohm Antenna Length 38.20mm Antenna Photo & Length (mm) SWR Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Frequency (MHz) Gain(dB) Max Min Avg 2400 -1.26174 -30.0801 -7.18716 2450 -0.764802 -36.5604 -7.48023 2500 -0.583582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Frequency (MHz) Gain(dB) Max Min Avg 2400 -5.2537 -22.1424 -12.4294 2450 -2.4652 -24.5837 -10.4702 2500 -1.86120 -29.5214 -9.20432