2ADZC-M21IWireless 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-M21I [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-M21I [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: Wireless Music Creation System FRN: 0024211138 Grantee Code: 2ADZC FCC ID: 2ADZC-M21I 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: 2025/12/02 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

Shenzhen Hollyland Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: December 22, 2025 Subject; Request for Confidentiality FCC ID: 2ADZC-M21I 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: M21I FCC ID: 2ADZC-M21I 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.

PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991A–2400-2500 MHz 1 Preliminary: (25/38) Features & Applications: ELECTRICAL SPECIFICATIONS @ 25 °C General Specifications Antenna type Nominal Impedance Polarization Radiation pattern Power withstanding Monopole antenna 50Ω Linear Omni 5W Frequency (MHz) 2400-2500MHz Return Loss (dB) ＜-10 Efficiency (%) ＞53 Peak Gain (dBi) ＞1.1 MECHANICAL SPECIFICATIONS W3991A Dimension (L x W x T) Material Color Weight 28.7x8.84x0.18 mm FPCB Black 0.09g ENVIRONMENTAL SPECIFICATIONS W3991A Storage Temperature Operating Temperature RoHS Compliant -40/+85° C-40/+85° CYes 2400-2500 MHz BT/BLE Antenna Size 28.7x8.84x0.18 mm IoT, M2M, industrial metering DSRC, ISM band radio YAGEO CORPORATION 3F,No.233-1,Pao Chiao Rd.,Xindian Dist., New Taipei City,R.O.C PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991A–2400-2500 MHz 2 Preliminary: (25/38) Mechanical Drawing W3991A Dimensions: mm, Unless otherwise specified, all tolerances are ±0.20mm gold plating Does not include the thickness of the release paper Release paper cutting edge gum PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991A–2400-2500 MHz 3 Preliminary: (25/38) TEST Setup W3991A PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991A–2400-2500 MHz 4 Preliminary: (25/38) Charts- Return Loss & Efficiency & Peak Gian W3991A Return Loss Efficiency and Peak Gain Frequency 频率(MHz) Efficiency 效率(%) Gain 增益(dBi) 240053.221.16 241055.951.34 242056.011.25 243057.741.46 244058.261.33 245060.841.35 246060.981.59 247061.541.89 248060.581.89 249061.341.71 250060.251.43 PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991A–2400-2500 MHz 5 Preliminary: (25/38) Charts- Radiation Pattern W3991A PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991B–2400-2500 MHz 1 Preliminary: (25/38) Features & Applications: ELECTRICAL SPECIFICATIONS @ 25 °C General Specifications Antenna type Nominal Impedance Polarization Radiation pattern Power withstanding Monopole antenna 50Ω Linear Omni 5W Frequency (MHz) 2400-2500MHz Return Loss (dB) ＜-10 Efficiency (%) ＞50 Peak Gain (dBi) ＞2.5 MECHANICAL SPECIFICATIONS W3991B Dimension (L x W x T) Material Color Weight 22.4x5.9x0.18 mm FPCB Black 0.05g ENVIRONMENTAL SPECIFICATIONS W3991B Storage Temperature Operating Temperature RoHS Compliant -40/+85° C -40/+85° C Yes 2400-2500 MHz BT/BLE Antenna Size 22.4x5.9x0.18 mm IoT, M2M, industrial metering DSRC, ISM band radio PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991B–2400-2500 MHz 2 Preliminary: (25/38) Mechanical Drawing W3991B Dimensions: mm, Unless otherwise specified, all tolerances are ±0.20mm gum Release paper cutting edge Does not include the t hickness of the release paper gold plating PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991B–2400-2500 MHz 3 Preliminary: (25/38) TEST Setup W3991B PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991B–2400-2500 MHz 4 Preliminary: (25/38) Charts- Return Loss & Efficiency & Peak Gian W3991B Return Loss Efficiency and Peak Gain Frequency 频率 (MHz) Efficiency 效率 (%) Gain 增益 (dBi) 2400 52.89 3.23 2410 53.32 3.29 2420 54.48 3.14 2430 54.38 3.08 2440 55.05 3.37 2450 56.25 3.63 2460 55.93 3.60 2470 55.66 3.44 2480 54.84 3.22 2490 53.12 2.92 2500 50.88 2.51 PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991B–2400-2500 MHz 5 Preliminary: (25/38) Charts- Radiation Pattern W3991B PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991C–2400-2500 MHz 1 Preliminary: (25/38) Features & Applications: ELECTRICAL SPECIFICATIONS @ 25 °C General Specifications Antenna type Nominal Impedance Polarization Radiation pattern Power withstanding Dipole antenna 50Ω Linear Omni 5W Frequency (MHz) 2400-2500MHz Return Loss (dB) ＜-10 Efficiency (%) ＞48 Peak Gain (dBi) ＞1.1 MECHANICAL SPECIFICATIONS W3991C Dimension (L x W x T) Material Color Weight 27.2x6.68x0.18 mm FPCB Black 0.06g ENVIRONMENTAL SPECIFICATIONS W3991C Storage Temperature Operating Temperature RoHS Compliant -40/+85° C -40/+85° C Yes 2400-2500 MHz BT/BLE Antenna Size 27.2x6.68x0.18 mm IoT, M2M, industrial metering DSRC, ISM band radio PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991C–2400-2500 MHz 2 Preliminary: (25/38) Mechanical Drawing W3991C Dimensions: mm, Unless otherwise specified, all tolerances are ±0.20mm gum R elease paper cutting edge Does not include the thickness of the release paper gold plating PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991C–2400-2500 MHz 3 Preliminary: (25/38) TEST Setup W3991C PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991C–2400-2500 MHz 4 Preliminary: (25/38) Charts- Return Loss & Efficiency & Peak Gian W3991C Return Loss Efficiency and Peak Gain Frequency 频率 (MHz) Efficiency 效率 (%) Gain 增益 (dBi) 2400 48.49 1.11 2410 49.58 1.26 2420 50.38 1.12 2430 52.52 1.17 2440 52.69 1.11 2450 54.48 1.11 2460 54.94 1.02 2470 55.84 1.15 2480 54.19 1.47 2490 55.10 1.62 2500 53.23 1.39 PulseElectronics.com Internal Antenna 2.4GHz FPC Antenna W3991C–2400-2500 MHz 5 Preliminary: (25/38) Charts- Radiation Pattern W3991C

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Page 1 of 64 Report No.: AiTSZ-251120029FW1 FCC SAR EVALUATION REPORT In accordance with the requirements of FCC 47 CFR Part 2(2.1093) and IEEE Std 1528-2013 Product Name: Wireless Music Creation System Model No.: M21I Serial Model: N/A Brand Name: Report No.: AiTSZ-251120029FW1 FCC ID: 2ADZC-M21I 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 64 Report No.: AiTSZ-251120029FW1 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 ........................ : Wireless Music Creation System Trademark ........................... : Model and/or type reference : M21I 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-251120029-1 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 64 Report No.: AiTSZ-251120029FW1 ※ ※ Revision History ※ ※ REV. DESCRIPTION ISSUED DATE REMARK Rev.1.0 Initial Test Report Release Nov. 28, 2025 Jack Li Page 4 of 64 Report No.: AiTSZ-251120029FW1 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 Uncertain…

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- Page 1 of 62 - Report No.: HB20251028058E-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: Wireless Music Creation System Trade Mark: Model Number: M21I FCC ID: 2ADZC-M21I 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 62 - Report No.: HB20251028058E-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 ................................................................................................................................................ 19 5.3.1 Limits ........................................................................................................................................................ 19 5.3.2 Test Procedures ......................................................................................................................................... 19 5.3.3 Test Setup .................................................................................................................................................. 19 5.3.4 Test Result ................................................................................................................................................. 20 5.3.5 Radiated Band Edge ................................................................................................................................. 25 5.4 PEAK OUTPUT POWER .........................................................................................…

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- Page 1 of 78 - Report No.: HB20251028058E-03 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: Wireless Music Creation System Trade Mark: Model Number: M21I FCC ID: 2ADZC-M21I 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 78 - Report No.: HB20251028058E-03 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 ................................................................................................................................................ 18 5.3.1 Limits ........................................................................................................................................................ 18 5.3.2 Test Procedures ......................................................................................................................................... 18 5.3.3 Test Setup .................................................................................................................................................. 18 5.3.4 Test Result ................................................................................................................................................. 19 5.3.5 Band Edge - Radiated ............................................................................................................................... 25 5.3.6 Spurious emission in restricted band 1000MHz-25000MHz ...............................................…

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