2AR82-WH278Remote Control

* the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process SC6052280 U.S. Agent Designation for Service of Process - Certification Attestation Letter 4/8/2026 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2AR82-WH278 FRN of applicant: 0028116184 Per section 2.911(d)(7) of the FCC rules, Guangzhou Shikun Electronics Co., Ltd FRN: 0029376316 (“the applicant”) certifies that the equipment for which authorization is sought is designated to thefollowing U.S. agent* for service of process: 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 Tel: +1 626 366 4358 Agent Email Address: [email protected] The above contact person accepts the obligation for service of process. The applicant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Signed:Agent Signed (if different from Applicant): Signed: Printed name: AiyanaWang Title:Compliance Engineer Company Name: Guangzhou Shikun Electronics Co., Ltd Date: 4/8/2026 Signed: Printedname: Michael Chan Title: Technical Director Company Name: Global Product Services and Consultation LLC Date: 4/8/2026

GuangzhouShikunElectronicsCo.,Ltd Date:4/14/2026 FederalCommunicationsCommissions AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 RE:CFR47§2.911(d)(5)Attestation FCCID:2AR82-WH278 GranteeFRN:0028116184 1.GuangzhouShikunElectronicsCo.,Ltdcertifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. 2.GuangzhouShikunElectronicsCo.,Ltd(“theapplicant”)certifiesthat,thedevicedoes nothavecybersecurityand/oranti-virussoftwareproducedorprovidedbyKaspersky Lab,Inc.oranyofitssuccessorsandassignees,identifiedontheCoveredListinstalled onthedevice,norwillitbeinstalledbytheapplicantanytimeaftercertification. 3.GuangzhouShikunElectronicsCo.,Ltd(“theapplicant”)certifiesthattheRFdeviceisnot arouter“producedinaforeigncountry”, 4.GuangzhouShikunElectronicsCo.,Ltdcertifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredListasanentityproducing “covered”equipmentandisnotanaffiliateorsubsidiaryofanentityidentifiedonthe CoveredList. Sincerelyyours, Name:AiyanaWang JobTitle:ComplianceEngineer CompanyName:GuangzhouShikunElectronicsCo.,Ltd

GuangzhouShikunElectronicsCo.,Ltd Date:4/8/2026 FederalCommunicationsCommission 7435OaklandMillsRoad ColumbiaMD21046 Towhomitmayconcern: I,theundersigned,herebyauthorizeULVerificationServicesInc.toactonourbehalfinall mannersrelatingtoapplicationforequipmentauthorization,includingsigningofalldocuments relatingtothesematters.AnyandallactscarriedoutbyULVerificationServicesInc.onour behalfshallhavethesameeffectasactsofourown. I,theundersigned,herebycertifythatwearenotsubjecttoadenialoffederalbenefits,that includesFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuseActof1988,21U.S.C. 853(a). InauthorizingULVerificationServicesInc.asourrepresentative,westillrecognizethatweare responsibleto: a)complywiththerelevantprovisionsofthecertificationprogram; b)makeallnecessaryarrangementsfortheconductoftheevaluation,including provisionforexaminingdocumentationandaccesstoallareas,records(including internalauditreports)andpersonnelforthepurposesofevaluation(e.g.testing, inspection,assessment,surveillance,reassessment)andresolutionofcomplaints; c)makeclaimsregardingcertificationonlyinrespectofthescopeforwhich certificationhasbeengranted; d)donotuseourproductcertificationinsuchamannerastobringtheCertification Divisionintodisreputeandnotmakeanystatementregardingourproduct certificationwhichtheCertificationDivisionmayconsidermisleadingor unauthorized; e)uponsuspensionorcancellationofcertification,discontinueuseofalladvertising matterthatcontainsanyreferencetheretoandreturnanycertificationdocuments asrequiredbytheCertificationDivision; f)usecertificationonlytoindicatetheproductsarecertifiedasbeinginconformity withspecifiedstandards; g)endeavortoensurethatnocertificateorreportnoranypartthereofisusedina misleadingmanner; h)ensurethatanyreferencetoourproductcertificationincommunicationmediasuchas documents,brochuresoradvertising,complieswiththerequirementsofthe CertificationDivision; i)keeparecordofallcomplaintsmadeknowntousrelatingtotheproduct’s compliancewithrequirementsoftherelevantstandardandtomaketheserecords availabletothewhenrequested; j)takeappropriateactionwithrespecttosuchcomplaintsandanydeficienciesfoundin productsorservicesthataffectcompliancewiththerequirementsforcertification; k)documenttheactionstaken. Thisauthorizationisvaliduntilfurtherwrittennoticefromtheapplicant. SincerelyYours, Signedby: CompanyName:GuangzhouShikunElectronicsCo.,Ltd ContactName:AiyanaWang TitleofPerson:ComplianceEngineer Address:NO.6LiankunRoad,HuangpuDistrict,Guangzhou,China

GuangzhouShikunElectronicsCo.,Ltd FederalCommunicationsCommission 7435OaklandMillsRoad ColumbiaMD21046 Subject:RequestforConfidentiality FCCID:2AR82-WH278 ToWhomItMayConcern: PursuanttotheprovisionsofSections0.457and0.459oftheCommission’srules(47CFR§§ 0.457,0.459),wearerequestingtheCommissiontowithholdthefollowingattachmentsas confidentialdocumentfrompublicdisclosureindefinitely. SchematicDiagram BlockDiagram TheoryofOperation Abovementioneddocumentcontainsdetailedsystemandequipmentdescriptionareconsidered asproprietaryinformationinoperationoftheequipment.Thepublicdisclosureofabove documentsmightbeharmfultoourcompanyandwouldgivecompetitoranunfairadvantagein themarket. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatandcorrespondent duringcertificationreviewprocesscannotbegrantedasconfidentialdocumentsandthose informationwillbeavailableforpublicreviewoncethegrantofequipmentauthorizationis issued. BestRegards Name:AiyanaWang JobTitle:ComplianceEngineer CompanyName:GuangzhouShikunElectronicsCo.,Ltd

GuangzhouShikunElectronicsCo.,Ltd DATE:04/08/2026 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 RequestforShort-TermConfidentiality Companyname:GuangzhouShikunElectronicsCo.,Ltd FCCID:2AR82-WH278 FCCPart15Certification PursuanttoSections0.457and0.459ofthecommissionrules,andinaccordancewith theFCCPublicnoticedatedJune15,2004(DA04-1705),weherebyrequestshort-term confidentialityforthefollowingitemspriortomarketingthedevice.: (1)TestSetupPhotos (2)ExternalPhotos (3)InternalPhotos (4)UserManual Theapplicantrequeststheexhibitsselectedaboveasshorttermconfidentialbewithheld frompublicviewforaperiodof180daysfromthedateoftheGrantofEquipment Authorizationandpriortomarketing.Thisistoavoidprematurereleaseofsensitive informationpriortomarketingorreleaseoftheproducttothepublic. Sincerely, Name:AiyanaWang JobTitle:ComplianceEngineer CompanyName:GuangzhouShikunElectronicsCo.,Ltd

Label locates in the battery compartment,End users can easily see the label when replacing the battery Permanent adhesive type is used to fix the label ,the label drawing isn't removed easily. Label A Label B Label location of Label A Label location of label B

. Measurement Report for Device, , , UID 0 -, Channel 0 (2450.000MHz) Device under Test Properties Model, Manufacturer Dimensions [mm] IMEI DUT Type Device, 50.0 x 10.0 x 8.0 Dipole 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 , CW, 0-- 2450.000, 0 7.84 1.85 40.5 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- 09 EX3DV4 - SN7733, 2025-09-08 DAE4 Sn1739, 2025-09-08 Scan Setup Area Scan Zoom Scan Grid Extents [mm] 40.0 x 80.0 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 N/A N/A Surface Detection VMS + 6p VMS + 6p Scan Method Measured Measured Measurement Results Area Scan Zoom Scan Date 2026-05-09, 11:17 2026-05-09, 11:24 psSAR1g [W/kg] 5.14 5.19 psSAR10g [W/kg] 2.36 2.42 Power Drift [dB] 0.00 -0.01 Power Scaling Disabled Disabled Scaling Factor [dB] TSL Correction No correction No correction M2/M1 [%] 81.2 Dist 3dB Peak [mm] 9.0 Warning(s) / Error(s) Details Area Scan Zoom Scan Warning(s) Error(s)

. MeasurementReportforDevice,FRONT,ISM2.4GHzBand,UID10670AAA,Channel78(2480.000MHz) DeviceunderTestProperties Model,ManufacturerDimensions[mm]IMEIDUTType Device,166.0x40.0x16.0RemoteControl ExposureConditions PhantomSection, TSL Position,Test Distance[mm] BandGroup, UID Frequency[MHz], ChannelNumber ConversionFactorTSLConductivity [S/m] TSLPermittivity Flat, HeadSimulating Liquid FRONT, 0.00 ISM2.4GHz Band Bluetooth, 10670-AAA 2480.000, 78 7.911.8740.3 HardwareSetup PhantomTSL,MeasuredDateProbe,CalibrationDateDAE,CalibrationDate Twin-SAMV8.0(30degprobetilt)- 2100 HBBL-600-10000Charge:xxxx,2026-05- 09 EX3DV4-SN7733,2025-09-08DAE4Sn1739,2025-09-08 ScanSetup AreaScanZoomScan GridExtents[mm]80.0x200.030.0x30.0x30.0 GridSteps[mm]10.0x10.05.0x5.0x1.5 SensorSurface[mm]3.01.4 GradedGridN/AYes GradingRatioN/A1.5 MAIAYY SurfaceDetectionVMS+6pVMS+6p ScanMethodMeasuredMeasured MeasurementResults AreaScanZoomScan Date2026-05-09,14:052026-05-09,14:13 psSAR1g[W/kg]0.0880.087 psSAR10g[W/kg]0.0420.040 PowerDrift[dB]-0.07-0.05 PowerScalingDisabledDisabled ScalingFactor[dB] TSLCorrectionNocorrectionNocorrection M2/M1[%]77.5 Dist3dBPeak[mm]10.2 Warning(s)/Error(s) DetailsAreaScanZoomScan 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 Remote Control MODEL NUMBER: WH-278 REPORT NUMBER: 4792183744-4-SAR-3 ISSUE DATE: May 9, 2026 FCC ID: 2AR82-WH278 Prepared for Guangzhou Shikun Electronics Co., Ltd NO.6 Liankun Road, Huangpu District, Guangzhou, 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.: 4792183744-4-SAR-3 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 May 9, 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.: 4792183744-4-SAR-3 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 4792183744-4-SAR-3_Appendixes A Photo .................................................................................................. 24 4792183744-4-SAR-3_Appendixes B System Check Plots ........................................................................... 24 4792183744-4-SAR-3_Appendixes C Highest Test Plots .............................................................................. 24 4792183744-4-SAR-3_Appendixes D Cal. Certificates .................................................................................. 24 REPORT NO.: 4792183744-4-SAR-3 Page 4 of 24 UL Verification Services (Guangzhou) Co., Ltd, Song Shan Lake Branch FORM NO: 10-SL-F0036 This report sh…

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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 Remote Control MODEL NUMBER: WH-278 REPORT NUMBER: 4792183744-7-RF-1 ISSUE DATE: May 25, 2026 FCC ID: 2AR82-WH278 IC: 24728-WH278 Prepared for Guangzhou Shikun Electronics Co., Ltd NO.6 Liankun Road, Huangpu District, Guangzhou, 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.: 4792183744-7-RF-1 Page 2 of 67 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 May 25, 2026 Initial Issue REPORT NO.: 4792183744-7-RF-1 Page 3 of 67 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 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 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. 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. 2. For FCC, this report is also performed according to ANSI C63.10-2020 + Cor.1-2023 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.: 4792183744-7-RF-1 Page 4 of 67 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 ................................................................................................ 10 5.4. TEST CHANNEL CONFIGURATION ...................................................................... 10 5.5. THE WORSE CASE POWER SETTING PARAMETER .......................................... 10 5.6. DESCRIPTION OF AVAILABLE ANTENNAS ......................................................... 10 5.7. SETUP DIAGRAM .................................................................................................. 11 6. MEASURING EQUIPMENT AND SOFTWARE USED......................................................... 12 7. ANTENNA PORT TEST RESULTS ..................................................................................... 14 7.1. CONDUCTED OUTPUT POWER ........................................................................... 14 7.2. 6DB BANDWIDTH AND 99% OCCUPIED BANDWIDTH ........................................ 15 7.3. POWER SPECTRAL DENSITY .............................................................................. 17 7.4. CONDUCTED BAND EDGE AND SPURIOUS EMISSION ..................................... 19 7.5. DUTY CYCLE ......................................................................................................... 21 8. RADIATED TEST RESULTS ............................................................................................... 22 8.1. RESTRICTED BANDEDGE ..............................…

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TEST REPORT Name of the sample： WH-839 9_ B LE Ho o k-Sha ped Anten na Model/Type： WH-83 9 9_ B LE Applicant： Wuxi W ei da I nt ell ig e nt El ec tr o nic s Co ., Ltd . Test engineer: Mark Specifications Summary ITEM SPEC. Model Name ISM 2.4 GHz Center Frequency 2400 MHz 2450 MHz 2500 MHz 1.92 dBi 1.58 dBi 0.49 dBi MAX. GAIN 1.92 dBi Polarization Horizontal Azimuth Beam Pattern Omni-directional Impedance 50 Ω Antenna Length 10.35 mm Antenna Photo & Length Test procedure Test method EMT-AMS Antenna Measurement System Software (Version: V2.0.1) 1.List of Test Instrument No. Instrument Manufacturer Model No. S/N Version Calibration Cycle 1 Network Analyzer R&S ZVB8 101348 4.31.7.2 2025/04/03~2026/04/02 2 Antenna Measurement System (OTA Test System) EM-Testing EMT68FF EMT68FF- ZZ001 / 2024/11/09~2027/11/08 3 Antenna Measurement System (OTA) Shielding EM-Testing EMT68FF EMT68FF- ZZ001 / 2025/10/22~2026/10/21 4 EMT-AMS Antenna Measurement System Software / / / V2.0.1 / 2.Photos Figure1 . Front view of the EUT Figure 2. Photo of Sample Testing Environment Main antenna : 2400 MHz 1.1 Horizontal 1.2 Vertical 2. Main antenna : 2450 MHz 2.1 Horizontal 2.2 Vertical 3. Main antenna : 2500 MHz 3.1 Horizontal 3.2 Vertical 4.Result Center Frequency Maximum Ant Gain 2400 MHz H 1.92 dBi V -9.19 dBi 2450 MHz H 1.58 dBi V -9.64 dBi 2500 MHz H 0.49 dBi V -11.5 dBi