2ADZC-M21EWireless Music Creation System

Rev 1/26/2023 Shenzhen Hollyland Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Dec. 21, 2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2ADZC-M21E [Shenzhen Hollyland Technology Co., Ltd.] 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. [Shenzhen Hollyland Technology Co., Ltd.] 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) Vincent Ma Rev 1/26/2023 Shenzhen Hollyland Technology Co., Ltd. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Dec. 21, 2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2ADZC-M21E [Shenzhen Hollyland 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Vincent Ma

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: Hevo technology Co.,Ltd Address: 18008 Sky Park Cirirvine, Irvine, CA 92614, United States FRN: 0033495417 Contact Name: Vincent Ma Telephone No: (949)-932-0648 E-mail: [email protected] This letter is to confirm that the US Agent for Service of Process accepts responsibility to act as a local representative on behalf of Shenzhen Hollyland Technology Co., Ltd. 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. Applicant: Company Name: Shenzhen Hollyland Technology Co., Ltd. Product Description: TWS Monitor Earphone FRN: 0024211138 Grantee Code: 2ADZC FCC ID: 2ADZC-M21E Contact Name: Vincent Ma Address: 8F, Building 5D, Skyworth Innovation Valley, Tangtou Road, Shiyan Street, Baoan District, Shenzhen, 518055 China Telephone No: +86-755-86000682 E-mail: [email protected] 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. This Agreement is valid until (Permanently valid). Date: 2025/12/21 Applicant’s Name: Shenzhen Hollyland Technology Co., Ltd. US Agent for Service of Process’s Name: Hevo technology Co.,Ltd Title: Sales Director Title: Manager Signature Signature

CC-JL-RD-36V1.0 1 Antenna Part Specification Project name： A6201 Antenna name： FPCB Antenna Version： V1.0 Date： 2025.9.2 Manufacturer： Shenzhen Cicent Communication Technology Co., Ltd. Manufacturer address： 505-506 ,ABlock,Donglian Building,Chuangye 2 road,Baoan District,Shenzhen,Guangdong,P.R china CC-JL-RD-36V1.0 2 Contents I: The report of passive data ...................................................................................................................................................... 3 II：3D Active test report of antenna ....................................................................................................................................... 13 III：Antenna matching circuit ................................................................................................................................................ 14 IV：Antenna structure diagram file ........................................................................................................................................ 15 Change record Compile / change date Reason for change Changed content Version 2025.9.2 First edition First edition V1.0 CC-JL-RD-36V1.0 3 I: The report of passive data Angilent E5071C antenna S11 parameter：（L-free） CC-JL-RD-36V1.0 4 Antenna efficiency and gain: （L-free） L-free Frequency （MHz） Gain (dBi) Efficiency （dB） Efficiency (% ) 2400 -7.6 -8.3 14.7 2410 -7.3 -8.0 15.8 2420 -6.9 -7.8 16.7 2430 -6.7 -7.6 17.3 2440 -6.6 -7.3 18.7 2450 -6.6 -7.5 17.8 2460 -6.6 -7.6 17.6 2470 -6.7 -7.9 16.3 2480 -6.9 -8.2 15.0 2490 -7.1 -8.5 14.2 2500 -7.3 -8.7 13.5 average -6.9 -7.9 16.1 3D Antenna radiation pattern：（L-free） CC-JL-RD-36V1.0 5 2D Antenna radiation pattern: （L-free） Theta=90° Phi=0° Phi=90° CC-JL-RD-36V1.0 6 Antenna efficiency and gain: （L- head model） L- head model Frequency （MHz） Gain (dBi) Efficiency （dB） Efficiency (% ) 2400 -9.8 -12.2 6.1 2410 -9.3 -11.9 6.4 2420 -8.9 -11.7 6.8 2430 -8.6 -11.5 7.1 2440 -8.4 -11.3 7.4 2450 -8.2 -11.2 7.5 2460 -8.1 -11.8 6.6 2470 -8.0 -11.8 6.7 2480 -8.0 -11.8 6.7 2490 -8.1 -12.6 5.5 2500 -8.2 -12.7 5.3 average -8.5 -11.9 6.6 3D Antenna radiation pattern：（L- head model） CC-JL-RD-36V1.0 7 2D Antenna radiation pattern: （L- head model） Theta=90° Phi=0° Phi=90° CC-JL-RD-36V1.0 8 antenna S11 parameter：（R-free） Antenna efficiency and gain: （R-free） R-free Frequency （MHz） Gain (dBi) Efficiency （dB） Efficiency (% ) 2400 -7.7 -8.5 14.2 2410 -7.2 -8.1 15.5 2420 -6.7 -7.8 16.6 2430 -6.4 -7.6 17.6 2440 -6.2 -7.4 18.3 2450 -6.0 -7.5 17.8 2460 -6.0 -7.9 16.1 2470 -6.0 -7.9 16.1 2480 -6.0 -8.0 15.9 2490 -6.2 -8.2 15.2 2500 -6.4 -8.4 14.5 average -6.4 -7.9 16.2 CC-JL-RD-36V1.0 9 3D Antenna radiation pattern：（R-free） 2D Antenna radiation pattern: （R-free） Theta=90° CC-JL-RD-36V1.0 10 Phi=0° Phi=90° CC-JL-RD-36V1.0 11 Antenna efficiency and gain: （R- head model） R- head model Frequency （MHz） Gain (dBi) Efficiency （dB） Efficiency (% ) 2400 -8.5 -12.2 6.1 2410 -8.2 -12.0 6.3 2420 -8.0 -11.9 6.4 2430 -8.0 -11.7 6.7 2440 -8.0 -11.6 6.9 2450 -8.0 -11.5 7.0 2460 -8.2 -11.7 6.8 2470 -8.3 -11.8 6.7 2480 -8.6 -11.9 6.4 2490 -8.9 -12.1 6.2 2500 -9.2 -12.3 5.9 average -8.4 -11.9 6.5 3D Antenna radiation pattern：（R- head model） CC-JL-RD-36V1.0 12 2D Antenna radiation pattern: （R- head model） Theta=90° Phi=0° Phi=90° CC-JL-RD-36V1.0 13 II：3D Active test report of antenna free head model 1# Channel TRP（dBm） TIS（dBm） TRP（dBm） TIS（dBm） L CH 0 1.0 -86.5 -2.7 -82.9 CH 39 1.8 -87.1 -2.0 -83.4 CH 78 0.7 -86.2 -3.0 -82.4 free head model 1# Channel TRP（dBm） TIS（dBm） TRP（dBm） TIS（dBm） R CH 0 0.9 -86.3 -3.4 -82.0 CH 39 1.6 -87.0 -2.3 -83.1 CH 78 1.1 -86.7 -2.8 -82.8 OTA Standard Chamber CC-JL-RD-36V1.0 14 III：Antenna matching circuit CC-JL-RD-36V1.0 15 IV：Antenna structure diagram file

Shenzhen Hollyland Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: December 21, 2025 Subject; Request for Confidentiality FCC ID: 2ADZC-M21E To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Vincent Ma Title: Sales Director

Effective Date: April 2, 2020 QSF 7.6.4-8 – Agent Authorization Letter Template Page 1 of 1 Revision Date: Revision: 0 Shenzhen Hollyland Technology Co., Ltd. Date: Dec. 21, 2025 Product Model Number: M21E FCC ID: 2ADZC-M21E To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following:  Testing  Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. By: Contact Listed on FCC Wesbite Title: Sales Director Email: [email protected] Telephone: +86-755-86000682 On behalf of: Shenzhen Hollyland Technology Co., Ltd.

Note: Due to product structure reasons, the main body cannot reflect label information, so label information is reflected on the outer packaging and instructions.

Page 1 of 63 Report No.: AiTSZ-251120030FW1 FCC SAR EVALUATION REPORT In accordance with the requirements of FCC 47 CFR Part 2(2.1093) and IEEE Std 1528-2013 Product Name: TWS Monitor Earphone Model No.: M21E Serial Model: N/A Brand Name: Report No.: AiTSZ-251120030FW1 FCC ID: 2ADZC-M21E Prepared for Shenzhen Hollyland Technology Co., Ltd. 8F, Building 5D, Skyworth Innovation Valley, Tangtou Road, Shiyan Street, Baoan District, Shenzhen, 518055 China Prepared by Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Tel.: +86 0755-230967639 Fax.: +86 0755-230967639 Page 2 of 63 Report No.: AiTSZ-251120030FW1 TEST RESULT CERTIFICATION Applicant’s name ................. : Shenzhen Hollyland Technology Co., Ltd. Address ................................. : 8F, Building 5D, Skyworth Innovation Valley, Tangtou Road, Shiyan Street, Baoan District, Shenzhen, 518055 China Manufacturer's Name .......... : Shenzhen Hollyland Technology Co., Ltd. Address ................................. : 8F, Building 5D, Skyworth Innovation Valley, Tangtou Road, Shiyan Street, Baoan District, Shenzhen, 518055 China Product description Product name ........................ : TWS Monitor Earphone Trademark ........................... : Model and/or type reference : M21E Serial Model........................... : N/A Standards ............................. : FCC 47 CFR Part 2(2.1093) IEEE Std 1528-2013 Published RF exposure KDB procedures This device described above has been tested by Guangdong Asia Hongke Test Technology Limited. In accordance with the measurement methods and procedures specified in IEEE Std 1528-2013 and KDB 865664 D01.Testing has shown that this device is capable of compliance with localized specific absorption rate (SAR) specified in FCC 47 CFR Part 2(2.1093). The test results in this report apply only to the tested sample of the stated device/equipment. Other similar device/equipment will not necessarily produce the same results due to production tolerance and measurement uncertainties. This report shall not be reproduced except in full, without the written approval of Guangdong Asia Hongke Test Technology Limited, this document may be altered or revised by Guangdong Asia Hongke Test Technology Limited, personal only, and shall be noted in the revision of the document. Test Sample Number .............................. : AiTSZ-251120030-1 Date of Test Date (s) of performance of tests ............. : Nov. 25, 2025 Date of Issue .......................................... : Nov. 28, 2025 Test Result.............................................. : Pass Reviewed by: Approved by: Ken Zou Jack Li Page 3 of 63 Report No.: AiTSZ-251120030FW1 ※ ※ Revision History ※ ※ REV. DESCRIPTION ISSUED DATE REMARK Rev.1.0 Initial Test Report Release Nov. 28, 2025 Jack Li Page 4 of 63 Report No.: AiTSZ-251120030FW1 TABLE OF CONTENTS 1. General Information .......................................................................................... 6 1.1. RF exposure limits .................................................................................. 6 1.2. Statement of Compliance ....................................................................... 7 1.3. EUT Description ..................................................................................... 8 1.4. Test specification(s) ................................................................................ 9 1.5. Ambient Condition ................................................................................. 9 1.6. Test Facility ............................................................................................. 9 2. SAR Measurement System ............................................................................... 10 2.1. SATIMO SAR Measurement Set-up Diagram ......................................... 10 2.2. Robot ................................................................................................... 11 2.3. Probe ................................................................................................... 12 2.3.1. E-Field Probe Calibration ................................................................ 12 2.4. Phantoms ............................................................................................. 13 2.5. Technical Data ...................................................................................... 14 2.6. Device Holder ...................................................................................... 15 2.7. Test Equipment List .............................................................................. 16 3. SAR Measurement Procedures ........................................................................ 19 3.1. Power Reference.................................................................................. 19 3.2. Area scan & Zoom scan ........................................................................ 19 3.3. Description of interpolation/extrapolation scheme ............................. 21 3.4. Volumetric Scan ................................................................................... 21 3.5. Power Drift .......................................................................................... 21 4. System Verification Procedure ......................................................................... 22 4.1. Tissue Verification ................................................................................ 22 4.1.1. Tissue Dielectric Parameter Check Results ..................................... 23 4.2. System Verification Procedure ............................................................. 24 4.2.1. System Verification Results ............................................................ 25 5. SAR measurement variabilit ............................................................................. 26 6. SAR Measurement Uncertainty .................…

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- Page 1 of 91 - Report No.: HB20251027079E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Test Report Product: TWS Monitor Earphone Trade Mark: Model Number: M21E FCC ID: 2ADZC-M21E Prepared for Shenzhen Hollyland Technology Co., Ltd. 8F, Building 5D, Skyworth Innovation Valley, Tangtou Road, Shiyan Street, Baoan District, Shenzhen, 518055 China Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 91 - Report No.: HB20251027079E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 6 1.1 DESCRIPTION OF EUT ................................................................................................................................................ 6 1.2 TEST MODE .............................................................................................................................................................. 6 1.3 OPERATION CHANNEL LIST .......................................................................................................................................... 6 1.4 TEST SETUP .............................................................................................................................................................. 7 1.5 POWER SETTING CONFIGURATION PARAMETERS ............................................................................................................... 7 1.6 ANCILLARY EQUIPMENT .............................................................................................................................................. 8 2 SUMMARY OF TEST RESULT ............................................................................................................................... 9 3 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................10 3.1 TEST LABORATORY ................................................................................................................................................... 10 3.2 ENVIRONMENTAL CONDITIONS ................................................................................................................................... 10 3.3 MEASUREMENT UNCERTAINTY ................................................................................................................................... 10 3.4 TEST SOFTWARE ...................................................................................................................................................... 11 4 LIST OF TEST EQUIPMENT .................................................................................................................................12 5 TEST ITEM AND RESULTS ...................................................................................................................................14 5.1 ANTENNA REQUIREMENT .......................................................................................................................................... 14 5.1.1 Standard Requirement ............................................................................................................................. 14 5.1.2 Test Result ................................................................................................................................................. 14 5.2 CONDUCTED EMISSION ............................................................................................................................................. 15 5.2.1 Limits ........................................................................................................................................................ 15 5.2.2 Test Procedures ......................................................................................................................................... 15 5.2.3 Test Setup .................................................................................................................................................. 16 5.2.4 Test Result ................................................................................................................................................. 16 5.3 RADIATED EMISSION ................................................................................................................................................ 17 5.3.1 Limits ........................................................................................................................................................ 17 5.3.2 Test Procedures ......................................................................................................................................... 17 5.3.3 Test Setup .................................................................................................................................................. 17 5.3.4 Test Result ................................................................................................................................................. 18 5.3.5 Radiated Band Edge ................................................................................................................................. 26 5.4 PEAK OUTPUT POWER ................................................................ ..................................…

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- Page 1 of 75 - Report No.: HB20251027079E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Test Report Product: TWS Monitor Earphone Trade Mark: Model Number: M21E FCC ID: 2ADZC-M21E Prepared for Shenzhen Hollyland Technology Co., Ltd. 8F, Building 5D, Skyworth Innovation Valley, Tangtou Road, Shiyan Street, Baoan District, Shenzhen, 518055 China Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 75 - Report No.: HB20251027079E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 6 1.1 DESCRIPTION OF EUT ................................................................................................................................................ 6 1.2 TEST MODE .............................................................................................................................................................. 6 1.3 OPERATION CHANNEL LIST .......................................................................................................................................... 7 1.4 TEST SETUP .............................................................................................................................................................. 7 1.5 POWER SETTING CONFIGURATION PARAMETERS ............................................................................................................... 7 1.6 ANCILLARY EQUIPMENT .............................................................................................................................................. 7 2 SUMMARY OF TEST RESULT ............................................................................................................................... 8 3 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................. 9 3.1 TEST LABORATORY ..................................................................................................................................................... 9 3.2 ENVIRONMENTAL CONDITIONS ..................................................................................................................................... 9 3.3 MEASUREMENT UNCERTAINTY ..................................................................................................................................... 9 3.4 TEST SOFTWARE ...................................................................................................................................................... 10 4 LIST OF TEST EQUIPMENT .................................................................................................................................11 5 TEST ITEM AND RESULTS ...................................................................................................................................13 5.1 ANTENNA REQUIREMENT .......................................................................................................................................... 13 5.1.1 Standard Requirement ............................................................................................................................. 13 5.1.2 Test Result ................................................................................................................................................. 13 5.2 CONDUCTED EMISSION ............................................................................................................................................. 14 5.2.1 Limits ........................................................................................................................................................ 14 5.2.2 Test Procedures ......................................................................................................................................... 14 5.2.3 Test Setup .................................................................................................................................................. 15 5.2.4 Test Result ................................................................................................................................................. 15 5.3 RADIATED EMISSION ................................................................................................................................................ 16 5.3.1 Limits ........................................................................................................................................................ 16 5.3.2 Test Procedures ......................................................................................................................................... 16 5.3.3 Test Setup .................................................................................................................................................. 16 5.3.4 Test Result ................................................................................................................................................. 17 5.3.5 Band Edge - Radiated ............................................................................................................................... 23 5.3.6 Spurious emission in restricted band 1000MHz-25000MHz .........................................................…

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