2AC23-RCBM1Voice remote

* theapplicantmustdesignateacontactlocatedintheUnitedStatesforpurposesofactingasthe applicant’sagentforserviceofprocess,regardlessofwhethertheapplicantisadomesticorforeign entity.AnapplicantlocatedintheUnitedStatesmaydesignateitselfastheagentforserviceofprocess. SC6066352 U.S.AgentDesignationforServiceofProcess- CertificationAttestationLetter 7/8/2026 TO:FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 ATTN.:ReviewingEngineer FCCID:2AC23-RCBM1 FRNofapplicant:0023889280 Persection2.911(d)(7)oftheFCCrules,HuiZhouGaoshengdaTechnologyCo.,LTD FRN:0023889280(“theapplicant”)certifiesthattheequipmentforwhichauthorizationissought isdesignatedtothefollowingU.S.agent*forserviceofprocess: CompanyName:GlobalProductServicesandConsultationLLC FCCRegistrationNumber(FRN):0033406703 PhysicalU.S.CompanyAddress:328WPalmAve.Monrovia,CA91016 ContactPerson:MichaelChan Tel:+16263664358 AgentEmailAddress:[email protected] Theabovecontactpersonacceptstheobligationforserviceofprocess. Theapplicantacceptstomaintainanagentfornolessthanoneyearafterthegranteehas terminatedallmarketingandimportationortheconclusionofanyCommission-related proceedinginvolvingtheequipment. ApplicantSigned:AgentSigned(ifdifferentfromApplicant): Signed: Printedname:HuiGuan Title:Manger CompanyName: HuiZhouGaoshengdaTechnologyCo.,LTD Date:7/8/2026 Signed: Printedname:MichaelChan Title:TechnicalDirector CompanyName:GlobalProductServicesand ConsultationLLC Date:7/8/2026

Hui Zhou Gaoshengda Technology Co.,LTD Date: 7/3/2026 Federal Communications Commissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(5) Attestation FCC ID: 2AC23-RCBM1 1.Hui Zhou Gaoshengda 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. 2.Hui Zhou Gaoshengda Technology Co.,LTD certifies that the device does not have cybersecurity and / or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, identified on the Covered List installed on the device, nor will it be installed by the applicant anytime after certification. 3.Hui Zhou Gaoshengda Technology Co.,LTD certifies that the RF device is not a router “produced in a foreign country”. 4.Hui Zhou Gaoshengda 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 and is not an affiliate or subsidiary of an entity identified on the Covered List. Sincerely yours, Name: Hui Guan Job Title: Manger Company Name: Hui Zhou Gaoshengda Technology Co.,LTD

Hui Zhou Gaoshengda Technology Co.,LTD Date: 7 /3/2026 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 To whom it may concern: I, the undersigned, hereby authorize UL Verification Services Inc. to act o n our behalf in all manners r elating t o application for equipment a uthorization, including signing of all documents relating to these matters. Any and all acts carried out b y UL Verification Services Inc. on our behalf shall have the same effect a s act s of our own. I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing UL Verification Services Inc. as our representative, we still recognize that we are responsible to: a)comply with the relevant provisions of the certification program; b)make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints; c)make claims regarding certification only in respect of the scope for which certification has been granted; d)do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized; e)upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division; f)use certification only to indicate the products are certified as being in conformity with specified standards; g)endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner; h)ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division; i)keep a record of all complaints made known to us relating to the product’s compliance with requirements of the relevant standard and to make these records available to the when requested; j)take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification; k)document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signed by: Company Name: Hui Zhou Gaoshengda Technology Co.,LTD Contact Name: Hui Guan Title of Person: Manger Address: No.6,Qiaoguang Road,Chenjiang Street,Zhongkai High-tech Zone,Huizhou,Guangdong,China

Hui Zhou Gaoshengda Technology Co.,LTD Date: 7/3/2026 Federal Communications Commissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(7) Agent Designation Attestation FCC ID: 2AC23-RCBM1 Grantee FRN: 0023889280 Hui Zhou Gaoshengda Technology Co.,LTD as required by section 2.911(d)(7), designates the following agent, located in the United States, f or purposes of acting as the applicant’s agent f or service of process. The applicant acknowledges that they will maintain an agent f or 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. The applicant further acknowledges their responsibility under CFR 47 §2.929(c) to inform the FCC whenever the agent information changes. U.S. Agent Information: Company Name: Global Product Services and Consultation LLC FCC Registration Number (FRN): 0033406703 Physical U.S. Company Address: 328 W Palm Ave. Monrovia, CA91016 Contact Person: Michael Chan Agent Email Address: [email protected] Sincerely yours, Name: Hui Guan Job Title: Manger Company Name: Hui Zhou Gaoshengda Technology Co.,LTD

Hui Zhou Gaoshengda Technology Co.,LTD Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Subject: FCC ID: Request for Confidentiality 2AC23-RCBM1 To Whom It May Concern: Pursuant to the provisions of Sections 0.457 and 0.459 of the Commission’s rules (47 CFR §§ 0.457, 0.459), we are requesting the Commission to withhold the following attachments as confidential document from public disclosure indefinitely. Schematic Diagram Block Diagram Theory of Operation 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. 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. Best Regards Company Name: Hui Zhou Gaoshengda Technology Co.,LTD Contact Name: Hui Guan Title of Person: Manger Address: No.6,Qiaoguang Road,Chenjiang Street,Zhongkai High-tech Zone,Huizhou,Guangdong,China Date: 7/3 /2026

Hui Zhou Gaoshengda Technology Co.,LTD DATE: 7/3/2026 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Request for Short-Term Confidentiality Company name: Hui Zhou Gaoshengda Technology Co.,LTD FCC ID: 2AC23-RCBM1 FCC Part 15 Certification Pursuant to Sections 0.457 and 0.459 of the commission rules, and in accordance with the FCC Public notice dated June 15, 2004 (DA 04-1705), we hereby request short-term confidentiality for the following items prior to marketing the device.: (1) Test Setup Photos (2) External Photos (3) Internal Photos (4) User Manual The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of 180 days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Sincerely, Signature Company Name: Hui Zhou Gaoshengda Technology Co.,LTD Contact Name: Hui Guan Title of Person: Manger Address: No.6,Qiaoguang Road,Chenjiang Street,Zhongkai High-tech Zone,Huizhou,Guangdong,China Date:7/3/2026

Note: This label will be permanently print on the product The waring information will be added to the user manual

. MeasurementReportforDevice,,,UID0-,Channel0(2450.000MHz) DeviceunderTestProperties Model,ManufacturerDimensions[mm]IMEIDUTType Device,50.0x10.0x8.0Dipole ExposureConditions PhantomSection, TSL Position,Test Distance[mm] BandGroup, UID Frequency[MHz], ChannelNumber ConversionFactorTSLConductivity [S/m] TSLPermittivity Flat, HeadSimulating Liquid ,CW, 0-- 2450.000, 0 7.911.8640.2 HardwareSetup PhantomTSL,MeasuredDateProbe,CalibrationDateDAE,CalibrationDate Twin-SAMV8.0(30degprobetilt)- 2100 HBBL-600-10000Charge:xxxx,2026-05- 12 EX3DV4-SN7733,2025-09-08DAE4Sn1739,2025-09-08 ScanSetup AreaScanZoomScan GridExtents[mm]40.0x80.030.0x30.0x30.0 GridSteps[mm]10.0x10.05.0x5.0x1.5 SensorSurface[mm]3.01.4 GradedGridN/AYes GradingRatioN/A1.5 MAIAN/AN/A SurfaceDetectionVMS+6pVMS+6p ScanMethodMeasuredMeasured MeasurementResults AreaScanZoomScan Date2026-05-12,09:152026-05-12,09:21 psSAR1g[W/kg]5.195.12 psSAR10g[W/kg]2.372.34 PowerDrift[dB]-0.140.03 PowerScalingDisabledDisabled ScalingFactor[dB] TSLCorrectionNocorrectionNocorrection M2/M1[%]79.9 Dist3dBPeak[mm]9.0 Warning(s)/Error(s) DetailsAreaScanZoomScan Warning(s) Error(s)

. Measurement Report for Device, FRONT, ISM 2.4 GHz Band, UID 10670 AAA, Channel 0 (2402.000MHz) Device under Test Properties Model, Manufacturer Dimensions [mm] IMEI DUT Type Device, 140.0 x 42.0 x 20.0 Voice remote Exposure Conditions Phantom Section, TSL Position, Test Distance [mm] Band Group, UID Frequency [MHz], Channel Number Conversion Factor TSL Conductivity [S/m] TSL Permittivity Flat, Head Simulating Liquid FRONT, 5.00 ISM 2.4 GHz Band Bluetooth, 10670-AAA 2402.000, 0 7.91 1.80 40.0 Hardware Setup Phantom TSL, Measured Date Probe, Calibration Date DAE, Calibration Date Twin-SAM V8.0 (30deg probe tilt) - 2100 HBBL-600-10000 Charge:xxxx, 2026-05- 12 EX3DV4 - SN7733, 2025-09-08 DAE4 Sn1739, 2025-09-08 Scan Setup Area Scan Zoom Scan Grid Extents [mm] 80.0 x 180.0 30.0 x 30.0 x 30.0 Grid Steps [mm] 10.0 x 10.0 5.0 x 5.0 x 1.5 Sensor Surface [mm] 3.0 1.4 Graded Grid N/A Yes Grading Ratio N/A 1.5 MAIA Y Y Surface Detection VMS + 6p VMS + 6p Scan Method Measured Measured Measurement Results Area Scan Zoom Scan Date 2026-05-12, 10:49 2026-05-12, 10:56 psSAR1g [W/kg] 0.039 0.038 psSAR10g [W/kg] 0.018 0.016 Power Drift [dB] -0.07 0.05 Power Scaling Disabled Disabled Scaling Factor [dB] TSL Correction No correction No correction M2/M1 [%] 73.0 Dist 3dB Peak [mm] 8.0 Warning(s) / Error(s) Details Area Scan Zoom Scan Warning(s) Error(s)

Annual Verification Result Dipole2450 Head TSL Target Value Measure Value Difference R（Ω） X（jΩ） R（Ω） X（jΩ） R（Ω） X（jΩ） Impedance 52.71 4.199 51.24 -4.500 -1.47 -8.70 Return loss(dB) -26.266 -26.73 1.8% Measure Date 15-Dec-25

The results reported herein have been performed in accordance with the laboratory’s terms of accreditation. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report apply to the test sample(s) mentioned above at the time of the testing period only and are not to be used to indicate applicability to other similar products. SAR EVALUATION REPORT FCC 47 CFR § 2.1093 IEEE Std. 1528-2013 For Voice remote MODEL NUMBER: RC-BM1 SERIES MODEL: RC-BM5 REPORT NUMBER: 4792176924-1-SAR-1 ISSUE DATE: May 12, 2026 FCC ID: 2AC23-RCBM1 Prepared for Hui Zhou Gaoshengda Technology Co.,LTD No.6,Qiaoguang Road,Chenjiang Street,Zhongkai High-tech Zone,Huizhou,Guangdong,China Prepared by UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch Room 101, Building 2, No.4, Information Road, Songshan Lake, Dongguan, Guangdong, China Tel: +86 769 22038881 Fax: +86 769 33244054 Website: www.ul.com Website: www.ul.com REPORT NO.: 4792176924-1-SAR-1 Page 2 of 24 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0036 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. Revision History Rev. Issue Date Revisions Revised By V0 April 16, 2026 Initial Issue \ Note: 1) This test report is only published to and used by the applicant, and it is not for evidence purpose in China. 2) The measurement result for the sample received is <Pass> according to < IEEE Std. 1528>when <Simple Acceptance> decision rule is applied. REPORT NO.: 4792176924-1-SAR-1 Page 3 of 24 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0036 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. Table of Contents 1. Attestation of Test Results .......................................................................................................... 4 2. Test Specification, Methods and Procedures ............................................................................ 5 3. Facilities and Accreditation ......................................................................................................... 6 4. SAR Measurement System & Test Equipment ........................................................................... 7 4.1. SAR Measurement System .............................................................................................................. 7 4.2. SAR Scan Procedures ..................................................................................................................... 8 4.3. Test Equipment .............................................................................................................................. 10 5. Measurement Uncertainty ......................................................................................................... 11 6. Device Under Test (DUT) Information ....................................................................................... 12 6.1. DUT Description............................................................................................................................. 12 6.2. Wireless Technology ...................................................................................................................... 12 7. Conducted Output Power Measurement and tune-up tolerance ............................................ 13 7.1. Test Results of 2.4GHz BLE .......................................................................................................... 13 7.2. Duty Cycle ..................................................................................................................................... 14 8. Test Configuration ..................................................................................................................... 15 8.1. 2.4GHz BLE SAR Test Requirements ............................................................................................... 15 8.2. Repeated measurements .................................................................................................................. 15 9. RF Exposure Conditions ........................................................................................................... 16 10. Dielectric Property Measurements & System Check ............................................................... 17 10.1. Dielectric Property Measurements ................................................................................................. 17 10.2. System Check ................................................................................................................................ 19 11. Measured and Reported (Scaled) SAR Results ....................................................................... 21 11.1. SAR Test Results of BLE ............................................................................................................... 22 12. Simultaneous Transmission SAR Analysis ............................................................................. 23 Appendixes ........................................................................................................................................... 24 4792176924-1-SAR-1_Appendixes A Photo .................................................................................................. 24 4792176924-1-SAR-1_Appendixes B System Check Plots ........................................................................... 24 4792176924-1-SAR-1_Appendixes C Highest Test Plots .............................................................................. 24 4792176924-1-SAR-1_Appendixes D Cal. Certificates .................................................................................. 24 REPORT NO.: 4792176924-1-SAR-1 Page 4 of 24 UL Verification Services (Guangzhou) Co., Ltd, S…

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The results reported herein have been performed in accordance with the laboratory’s terms of accreditation. This report shall not be reproduced except in full without the written approval of the Laboratory. The results in this report apply to the test sample(s) mentioned above at the time of the testing period only and are not to be used to indicate applicability to other similar products. FCC 47 CFR PART 15 SUBPART C ISED RSS-247 Issue 4 TEST REPORT For Voice remote MODEL NUMBER: RC-BM1 SERIES MODEL: RC-BM5 REPORT NUMBER: 4792176924-1-RF-1 ISSUE DATE: April 13, 2026 FCC ID: 2AC23-RCBM1 IC: 12290A-RCBM1 Prepared for Hui Zhou Gaoshengda Technology Co.,LTD No.6,Qiaoguang Road,Chenjiang Street,Zhongkai High-tech Zone,Huizhou,Guangdong,China Prepared by UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch Room 101, Building 2, No.4, Information Road, Songshan Lake, Dongguan, Guangdong, China Tel: +86 769 22038881 Fax: +86 769 33244054 Website: www.ul.com REPORT NO.: 4792176924-1-RF-1 Page 2 of 75 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0035 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. Revision History Rev. Issue Date Revisions Revised By V0 April 13, 2026 Initial Issue REPORT NO.: 4792176924-1-RF-1 Page 3 of 75 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0035 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. Summary of Test Results Test Item Clause Limit/Requirement Result Antenna Requirement N/A FCC Part 15.203/15.247 (c) RSS-GEN Clause 6.8 Pass AC Power Line Conducted Emission ANSI C63.10-2020, Clause 6.2 FCC Part 15.207 RSS-GEN Clause 8.8 N/A Conducted Output Power ANSI C63.10-2020, Clause 11.9.1.2&11.9.2.3.1 FCC Part 15.247 (b)(3) RSS-247 Clause 6.3.2 Pass 6dB Bandwidth and 99% Occupied Bandwidth ANSI C63.10-2020, Clause 11.8.1 & 6.9.3 FCC Part 15.247 (a)(2) RSS-247 Clause 6.3.1 (a) RSS-Gen Clause 6.7 Pass Power Spectral Density ANSI C63.10-2020, Clause 11.10.2 FCC Part 15.247 (e) RSS-247 Clause 6.3.1 (b) Pass Conducted Band edge and spurious emission ANSI C63.10-2020, Clause 11.11 FCC Part 15.247(d) RSS-247 Clause 6.6 Pass Radiated Band edge and Spurious Emission ANSI C63.10-2020, Clause 11.12 FCC Part 15.247 (d) FCC Part 15.205/15.209 RSS-247 Clause 6.6 RSS-GEN Clause 8.9 Pass Duty Cycle ANSI C63.10-2020, Clause 11.6 None; for reporting purposes only. Pass Note: 1. N/A: In this whole report not applicable. 2. For FCC, ANSI C63.10:2020 + Cor.1:2023 is also considered for the corresponding test item which is needed. 3. For ISED, this report is also performed according to ANSI C63.10-2020 + Cor.1-2023 + C63.10a-2024 + Errata to C63.10a-2024 standards. *This test report is only published to and used by the applicant, and it is not for evidence purpose in China. *The measurement result for the sample received is <Pass> according to <FCC 47 CFR PART 15 SUBPART C, ISED RSS-247 Issue 4> when <Simple Acceptance> decision rule is applied. Decision rule for statement of conformity: The measurement uncertainty is not taken into account for statement of conformity. REPORT NO.: 4792176924-1-RF-1 Page 4 of 75 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0035 This report shall not be reproduced except in full, without the written approval of UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch. CONTENTS 1. ATTESTATION OF TEST RESULTS ..................................................................................... 6 2. TEST METHODOLOGY ......................................................................................................... 7 3. FACILITIES AND ACCREDITATION ..................................................................................... 7 4. CALIBRATION AND UNCERTAINTY ................................................................................... 8 4.1. MEASURING INSTRUMENT CALIBRATION ........................................................... 8 4.2. MEASUREMENT UNCERTAINTY ............................................................................ 8 5. EQUIPMENT UNDER TEST .................................................................................................. 9 5.1. DESCRIPTION OF EUT ........................................................................................... 9 5.2. CHANNEL LIST ........................................................................................................ 9 5.3. MAXIMUM POWER .................................................................................................. 9 5.4. TEST CHANNEL CONFIGURATION ...................................................................... 10 5.5. THE WORSE CASE POWER SETTING PARAMETER .......................................... 10 5.6. DESCRIPTION OF AVAILABLE ANTENNAS ......................................................... 10 5.7. SUPPORT UNITS FOR SYSTEM TEST ................................................................. 11 6. MEASURING EQUIPMENT AND SOFTWARE USED......................................................... 12 7. ANTENNA PORT TEST RESULTS ..................................................................................... 15 7.1. CONDUCTED OUTPUT POWER ........................................................................... 15 7.2. 6DB BANDWIDTH AND 99% OCCUPIED BANDWIDTH ........................................ 16 7.3. POWER SPECTRAL DENSITY .............................................................................. 18 7.4. CONDUCTED BAND EDGE AND SPURIOUS EMISSION ..................................... 19 7.5. DUTY CYCLE ......................................................................................................... 21 8. RADIATED TEST RESULTS ....................................…

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Product Name PCB On-board Antenna Antenna Model RC-BM1 Manufacturer Address Enping Guanchuan Electronics Co., Ltd. Dongjiao Industrial Zone, Shengtang Town, Enping City, Guangdong Province, China Antenna Type Board-printed PCB antenna; PIFA antenna Test Laboratory Name ZTX SATIMO SG24 Anechoic Chamber Test Laboratory Address No. 34, Shilong Avenue, Shiyan Street, Bao'an District, Shenzhen City, China Test Date October 14, 2025 Test Engineer Zhao Feng Test Software Satimo.Spm Software Version 1.5.5 Test standard IEEE Std 149-2021 Calibration Equipment Instrument Manufact urer Model Serial No. Calibratio n Date Calibratio n Expiry Vector Network Analyzer Keysight E5071C MY47002902 2025.04.14 2026.04.13 Vector Network Analyzer Agilent E5071C MY46521960 2025.04.14 2026.04.13 SG24 Antenna Test System SATIMO SG24 2025.04.14 2026.04.13 Antenna Drawing 2 Test Setup Photo Antenna Efficiency & Gain Test Procedure S11 parameter measurement: Efficiency, gain, and pattern measurement: Please refer to the document "antenna setup photo" 3 2D or 3D Pattern XOZ plane XOY plane YOZ plane 2450 MHz 3D radiation pattern