2BEMS-HMRF001RF RGB CONTROLLER

(Dongguan Huima Synthetic Electronics Co.,Ltd) (2025.12.29) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID:2BEMS-HMRF001) [Dongguan Huima Synthetic Electronics 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name) make zhang (Dongguan Huima Synthetic Electronics Co.,Ltd) (2025.12.29) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID:2BEMS-HMRF001) [Dongguan Huima Synthetic Electronics 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 an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) make zhang

Dongguan Huima Synthetic Electronics Co.,Ltd 2025.12.29 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: RF RGB CONTROLLER Trademark: N/A MODEL: HM-RF-001 FCC ID: 2BEMS-HMRF001 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. 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. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : make zhang / Manager Contact information / address: 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China

Dongguan Huima Synthetic Electronics Co.,Ltd 2025/12/29 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen STS Test Services Co., Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title : make zhang / Manager Contact information / address: 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China

Page 1 of 5 FCC ID: 2BEMS-HMRF001 External Photos Page 2 of 5 FCC ID: 2BEMS-HMRF001 Page 3 of 5 FCC ID: 2BEMS-HMRF001

Label & label location FCC ID:2BEMS-HMRF001 Label location

Page 4 of 5 FCC ID: 2BEMS-HMRF001 Internal Photos Antenna Page 5 of 5 FCC ID: 2BEMS-HMRF001

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. MPE Report Report No.:STS2512454H01 Issued for Dongguan Huima Synthetic Electronics Co.,Ltd 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China Product Name: RF RGB CONTROLLER Brand Name: N/A Model Name: HM-RF-001 Series Model(s): N/A FCC ID: 2BEMS-HMRF001 Test Standards: FCC 47CFR §2.1093 Page 2 of 8 Report No.: STS2512454H01 TEST REPORT Applicant’s Name ................. : Dongguan Huima Synthetic Electronics Co.,Ltd Address .................................. : 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China Manufacturer's Name .......... : Dongguan Huima Synthetic Electronics Co.,Ltd Address .................................. : 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China Product Description Product Name ........................ : RF RGB CONTROLLER Brand Name ........................... : N/A Model Name........................... : HM-RF-001 Series Model(s) ...................... : N/A Test Standards ..................... : FCC 47CFR §2.1093 447498 D01 Interim General RF Exposure Guidance v06 The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. Date of Test ............................................ : Date of receipt of test item ...................... : 19 Nov. 2025 Date (s) of performance of tests.............. : 19 Nov. 2025 to 20 Dec. 2025 Date of Issue ........................................... : 20 Dec. 2025 Test Result ............................................... : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 8 Report No.: STS2512454H01 TABLE OF CONTENTS 1. GENERAL INFORMATION 5 1.1 GENERAL DESCRIPTION OF THE EUT 5 1.2 TEST FACTORY 5 2. FCC 47CFR §2.1093 REQUIREMENT 6 2.1 TEST STANDARDS 6 2.2 LIMIT 6 2.3 TEST RESULT 8 Page 4 of 8 Report No.: STS2512454H01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 20 Dec. 2025 STS2512454H01 ALL Initial Issue Page 5 of 8 Report No.: STS2512454H01 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name RF RGB CONTROLLER Brand Name N/A Model Name HM-RF-001 Series Model(s) N/A Model Difference N/A Product Description The EUT is a RF RGB CONTROLLER Operation Frequency: 433.97MHz 304.25MHz Modulation Type: ASK ASK Antenna Designation: Internal antenna PCB antenna Antenna Gain(Peak) 0 dbi 0 dbi Power Rating DC 3V From Battery Adapter N/A Battery N/A Hardware Version N/A Software Version N/A 1.2 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 Page 6 of 8 Report No.: STS2512454H01 2. FCC 47CFR §2.1093 REQUIREMENT 2.1 TEST STANDARDS The limit for Maximum Permissible Exposure (MPE) specified in KDB 447498 D01 General RF Exposure Guidance v06 is followed. The gain of the antennas used in the product is extracted from the Antenna data sheets provided and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis Transmission formula is far field assumption, the calculated result of that is an over-prediction for near field power density. It is taken as worst case to specify the safety range. 2.2 LIMIT Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. Page 7 of 8 Report No.: STS2512454H01 The 1-g 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 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 is applied to determine SAR test exclusion. Page 8 of 8 Report No.: STS2512454H01 2.3 TEST RESULT Trun up Mode Detector Power (dBuV/m) @3m Power (dBm) Max Tune up (dBm) SRD PK 70.48 -24.72 -24±1 Note: Power(dBm)= dBuV/m@3m -95.2 Evaluation Result Mode Frequency MHz Separation distance (cm) Power (dBm) ERP (mW) SAR Test Exclusion Threshold SAR Test Exclusion Estimated SAR SRD 433.97 0.5 -23 0.00001 0.000001 Yes / Note: 1. Remark: The worst case gain of the antenna is 0dBi. 2. Threshold at which no SAR required is 0.000001≤ 3.0 for 1-g SAR, Separation distance ≤ 5mm. ※※※※※END OF THE REPORT※※※※※

ANT Gain:0 dbi Manufacturer: Dongguan Huima Synthetic Electronics Co.,Ltd Address: 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Radio Test Report Report No.:STS2512454W01 Issued for Dongguan Huima Synthetic Electronics Co.,Ltd 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China Product Name: RF RGB CONTROLLER Brand Name: N/A Model Name: HM-RF-001 Series Model(s): N/A FCC ID: 2BEMS-HMRF001 Test Standards: FCC Part 15.231 Page 2 of 30 Report No.:STS2512454W01 TEST REPORT Applicant’s Name ................. : Dongguan Huima Synthetic Electronics Co.,Ltd Address .................................. : 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China Manufacturer's Name ........... : Dongguan Huima Synthetic Electronics Co.,Ltd Address .................................. : 3rd Floor, Bingding A, No.1 Jiangxing Road, Huangjiang Village, Huangjiang Town, Dongguan City, Guangdong Province, China Product Description Product Name ............................ : RF RGB CONTROLLER Brand Name ............................... : N/A Model Name ........................... : HM-RF-001 Series Model(s) .................... : N/A Test Standards .......................... : FCC Part 15.231 Test Procedure ........................... : ANSI C63.10-2020 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC/IC requirements. And it is applicable only to the tested sample identified in the report. The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Date of Test ............................ : Date of Receipt of Test Item ... : 19 Nov. 2025 Date of performance of tests .. : 19 Nov. 2025 to 20 Dec. 2025 Date of Issue .......................... : 20 Dec. 2025 Test Result .............................. : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 30 Report No.:STS2512454W01 TABLE OF CONTENTS Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 6 1.2 MEASUREMENT UNCERTAINTY 6 2. GENERAL INFORMATION 7 2.1 GENERAL DESCRIPTION OF THE EUT 7 2.2 DESCRIPTION OF THE TEST MODES 8 2.3 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 8 2.4 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 9 2.5 EQUIPMENTS LIST 10 3. EMC EMISSION TEST 11 3.1 CONDUCTED EMISSION MEASUREMENT 11 3.2 TEST PROCEDURE 12 3.3 TEST SETUP 12 3.4 TEST RESULTS 12 4. RADIATED EMISSION MEASUREMENT 13 4.1 RADIATED EMISSION LIMITS 13 4.2 TEST PROCEDURE 15 4.3 DEVIATION FROM TEST STANDARD 15 4.4 TEST SETUP 16 4.5 EUT OPERATING CONDITIONS 17 4.6 TEST RESULTS 17 4.7 FIELD STRENGTH CALCULATION 18 5. BANDWIDTH TEST 22 5.1 LIMIT 22 5.2 TEST REQUIREMENTS 22 5.3 TEST PROCEDURE 22 5.4 TEST SETUP 22 5.5 EUT OPERATION CONDITIONS 23 5.6 TEST RESULTS 23 6. DUTY CYCLE 24 6.1 TEST PROCEDURE 24 6.2 TEST SETUP 24 6.3 EUT OPERATION CONDITIONS 24 6.4 TEST RESULTS 25 Page 4 of 30 Report No.:STS2512454W01 TABLE OF CONTENTS Page 7. AUTOMATICALLY DEACTIVATE 27 7.1 STANDARD REQUIREMENT 27 7.2 TEST PROCEDURE 27 8. ANTENNA REQUIREMENT 29 8.1 STANDARD REQUIREMENT 29 8.2 EUT ANTENNA 29 APPENDIX 1-PHOTOS OF TEST SETUP 30 Page 5 of 30 Report No.:STS2512454W01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 20 Dec. 2025 STS2512454W01 ALL Initial Issue Page 6 of 30 Report No.:STS2512454W01 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part 15.231,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission N/A -- 15.205(a)/15.209/ 15.231.(b) Radiated Spurious Emission PASS -- 15.231(a)(1)/ 15.231(b)(2) Transmission requirement PASS -- 15.231(C) 20 dB Bandwidth PASS -- 15.203 Antenna Requirement PASS -- Note: (1) “N/A” denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2020. 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. :101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuh ai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ±U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.751dB 2 Unwanted Emissions, conducted ±2.888dB 3 All emissions, radiated 9K-30MHz ±2.48dB 4 All emissions, radiated 30M-1GHz ±2.52dB 5 All emissions, radiated 1G-18GHz ±3.48dB 6 All emissions, radiated>18GHz ±4.18dB 7 Conducted Emission (9KHz-150KHz) ±2.48dB 8 Conducted Emission (150KHz-30MHz) ±2.52dB 9 Occupied Channel Bandwidth ±3.6% 10 Power Spectral Density, conducted ±1.214dB 11 Duty Cycle ±3.2% Page 7 of 30 Report No.:STS2512454W01 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name RF RGB CONTROLLER Trade Name N/A Model Name HM-RF-001 Series Model N/A Model Difference N/A Product Description The EUT is a RF RGB CONTROLLER Operation Frequency: 433.97MHz Modulation Type: ASK Antenna Designation: Internal antenna Antenna Gain(Peak) 0 dbi More details of EUT technical specification, please refer to the User Manual. Channel List Please refer to the Note 3. Power Rating DC 3V From Battery Adapter N/A Battery N/A Hardware version number N/A Software version number/FVIN N/A Connecting I/O Port(s) Please refer to the Note 1. Note: 1. For a more detailed features description, please refer to the manufacturer’s specifications orthe User Manual. 2. Table for filed Antenna Ant. Brand Mode…

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Page 1 of 1 FCC ID:2BEMS-HMRF001 RE (30MHz-1GHz) RE (Above 1GHz)