2BOUH-WWF-OFRemote

1/1 USAgentforServiceofProcessLETTEROFATTESTATION TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USAgentforServiceofProcess: CompanyName:GOLDENVICTORYINTERNATIONALTRADINGCOLTD FRN:0036377570 ContactName:LeonHowar Address:11016THSTREETSUITE1400DENVER,CO80202UnitedStates TelephoneNo:(337)255-0461 Email:[email protected] Applicant: Companyname:GuangzhouYulinTradingCo.,Ltd ProductDescription:Remote Granteecode:2BOUH FRN:0036932457 FCCID:2BOUH-WWF-OF ContactName:comyxiao Address:No.106FengzeEastRoad,NanshaDistrict,GuangzhouX1301-C010770,Guangdong China TelephoneNo.:18620378283 Email:[email protected] [GuangzhouYulinTradingCo.,Ltd]certifiesthat,asofthedateofthisfilingof theapplicationwiththeTCB,[GOLDENVICTORYINTERNATIONALTRADING COLTD]isourdesignatedUSagentforserviceofprocessfortheabove referencedFCCID.[GuangzhouYulinTradingCo.,Ltd]acceptstomaintainan agentfornolessthanoneyearafterthegranteehasterminatedallmarketing andimportationortheconclusionofanycommissionrelatedproceeding involvingequipment.[GOLDENVICTORYINTERNATIONALTRADINGCOLTD] accepts,asofthedateofthefilingoftheapplication,theobligationofthe designatedUSagentforserviceofprocessfortheabovereferenceFCCID. TheUSAgentforServiceofProcessisawareofandagreestocomplywiththerequirements outlinedintheFCCEquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause §2.911. TheApplicantisawareofandagreestocomplywiththerequirementsoutlinedintheFCC EquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause§2.911. Date:2026.6.10 Applicant’sName:comyxiaoUSAgent’sName:LeonHowar Title:ManagerTitle:Manager Signature Signature

AttestationStatement. OldCode:C526609124NewCode:00015544Ed.3 Changereason:FRNisaddedtotheApplicantinformationsection. 1/1 TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 TheCommissionadoptedrulesthatprohibitequipmentauthorizationfor“covered” telecommunicationsequipmentandvideosurveillanceequipmentproducedbyentitiesidentified ontheCommission’sCoveredList 1 ,whichisperiodicallyupdated.SeetheCoveredListformore details.ThisAttestationStatementistoconfirmthatwefollowtheSection2.911(d)(5)(i)-(ii) Applicant Companyname:GuangzhouYulinTradingCo.,Ltd Granteecode:2BOUH FRN:0036932457 FCCID:2BOUH-WWF-OF ContactName:comyxiao Address:No.106FengzeEastRoad,NanshaDistrict,GuangzhouX1301-C010770,Guangdong China TelephoneNo.:18620378283 Email:[email protected] i.GuangzhouYulinTradingCo.,Ltd(“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtisnot“covered”equipment prohibitedfromreceivinganequipmentauthorizationpursuanttosection 2.903oftheFCCrules.Theapplicantmustsignthiscertification. ii.GuangzhouYulinTradingCo.,Ltd(“theapplicant”)certifiesthat,asofthe dateofthefilingoftheapplication,theapplicant[isnot](asaspecifically namedentityoranyofitssubsidiariesoraffiliates)identifiedontheCovered Listasanentityproducing“covered”equipment.Theapplicantmustsign thiscertification. [GuangzhouYulinTradingCo.,Ltd](“theapplicant”)certifiesthat,asofthedateof thefilingofthe application,theapplicant[isnot]identifiedontheCoveredList asanentityproducing“covered” equipment. Date:2026.6.10 Applicant’sName:comyxiao Title:Manager Signature 1 TheCommission’sCoveredListispublishedbythePublicSafetyandHomelandSecurityBureauandpostedonthe Commission’swebsite.ThisCoveredList,whichisperiodicallyupdated,identifiesparticularequipment,producedby particularentities,thatconstitutes“covered”equipment.https://www.fcc.gov/supplychain/coveredlist

GuangzhouYulinTradingCo.,Ltd Code00018768Ed.2 Item1.Thedeviceisabletoinstallsoftware/programinstallation? ☐ Yes,gotoItem2. ☒ No.Inthiscase,therestoftheitemsdonotapply.ThedevicecannotsupportinstallationofKaspersky cybersecurityoranti-virussoftware. Item2.TechnicalRequirementsforKasperskyCybersecuritySoftware: #GeneralRequirements(ForallDevices)Yes/NoorN/AComments 1Internetconnectionforactivationandupdates(ForallOperating Systems) N/A #GeneralRequirements(ForWindowsDevices)Yes/NoorN/AComments Device Companyname Granteecode FCCID FRN Contactname Address Telephonenumber E-mail Chipset/moduleinformation OperatingSystem(ifapplicable) StorageCapacity(harddriveorother permanentmemorystorage,ifapplicable) Remote Guangzhou Yulin Trading Co., Ltd 2BOUH 2BOUH-WWF-OF 0036932457 comy xiao No.106 Fengze East Road, Nansha District, Guangzhou X1301-C010770,Guangdong China 18620378283 [email protected] JSC3075 N/A N/A 2 1Storage:1500MBfreespaceontheharddriveN/A 2OperatingSystem: MicrosoftWindows8,8.1,10&11Home/Pro/Enterprise Microsoft Windows7Starter/HomeBasic&Premium/Professional/ UltimateSP1orhigher N/A 3Processor:1GHzorhigher(x86orx64)N/A 4Memory(RAM)1GB(32-bit)or2GB(64-bit)N/A 5ScreenResolution:Minimumresolutionof1024x768N/A #GeneralRequirements(FormacOSdevices)Yes/NoorN/AComments 1OperatingSystemmacOS®13–14N/A 2Memory(RAM)4GBN/A 3Storage:3455MBfreespaceontheharddriveN/A #GeneralRequirements(ForAndroidDevices)Yes/NoorN/AComments 1Storage:150MBfreespaceN/A 2OperatingSystem:Android™10–14N/A 3ScreenResolution:Minimumresolutionof320x480N/A #GeneralRequirements(foriOSdevices)Yes/NoorN/AComments 1Storage:150MBfreespaceN/A 2OperatingSystem:iOS®17N/A #GeneralRequirements(ForLinuxsystem)Yes/NoorN/AComments 1Harddrive:1GBoffreespaceN/A 3 2CPU:IntelPentium1GHzorhigherN/A 3RAM:1GBN/A 4Minimumsoftwarerequirements: AlmaLinuxOS8orlater; AlterOS7.5orlater; AstraLinuxCommonEdition2.12orlater; CentOS6.7orlater; DebianGNU/Linux10.0orlater; EulerOS2.0orlater; OracleLinux7.3orlater; RedHatEnterpriseLinux6.7orlater; RockyLinux8.5orlater; SUSELinuxEnterpriseServer12.5orlater; Ubuntu12.04orlater; UncomOSHome/Business/Education/Enterprise2.2orlater; ALTLinuxWorkstaton/WorkstationK/Server/Education8or later; ROSALinuxWorkstation/Server12orlater; REDOS7.3andlater; N/A Afterreviewedthetechnicalrequirements,isthedevicecapableofsupportingtheinstallationof Kasperskysoftware? ☐Yes,gotoItem3. ☒ No.Inthiscase,therestoftheitemsdonotapply.ThedevicecannotsupportinstallationofKaspersky software Item3.ConnectivityCapabilities: 4 #PhysicalInterfacePurposeJustification 1 1 #WirelessInterfacePurposeJustification 1 1 Afterthereviewofthisitems,thedevice: ☒Cannotsupportinstallationofanycybersecurityoranti-virussoftwareonthecoveredlist. ☐ Potentiallycanoperatewithanycybersecurityoranti-virussoftwareonthecoveredlist–additionalthird- partyproofisprovidedtodemonstratecompliancewithrequirementsasof2.911(d)5(i),(ii)–“Proofof CompliancewithCoveredListSoftwareRequirements”ofthisdocumentapplies Signature:Name:comyxiao Date:2026.6.10 Oncethedocumentisfilledin,pleaseproceedtoprintaPDFofthisWord 1 Thejustificationfieldisusedtojustifywhythesoftwarecannotbereceivedthroughthatinterface.Checktheannexformore indications.

TCBCALLpágina1 FileFCCID:2BOUH-WWF-OF PleaseuploadanexhibitthatexplainshowdoestheTCBverifythenewagentinformation: 1-IstheaddressoftheagentavalidphysicalUSmailingaddress(notaUSpostofficebox,notavirtualmailbox,notP.O.Boxes,notavacantlot,notapublicbuilding, etc.) ○Wehavecheckediftheaddressexistsinarealandpotentialbuilding(Googlemaps)+officialUSregister,afterthisverificationandtheevidencebelowwecan guaranteethefollowing: notaUSpostofficebox notavirtualmailbox notP.O.Boxes notavacantlot notapublicbuilding(note) ►WecheckedtheFCCFRNSearchbasedontheinformationprovidedbythegrantee. Ontheofficialregisterfrom: https://www.sos.state.co.us/biz/BusinessEntityDetail.do?quitButtonDestination=BusinessEntityResults&nameTyp=ENT&masterFileId=20248279136&entityId2=20248279136&fileId=20248279136&srchTyp=ENTITY TCBCALLpágina2 Google: EINNumber： TCBCALLpágina3 ►CONCLUSIONbyTCB:TheASOPdefinedandprovidedbygranteeisVALIDandconfirmed.Thereforetheexhibit"C5266091_X23_Ed1_US_Agent_Letter" includedinthefileisok. 2-IstheagentphysicallylocatedatthatvalidUSaddresssuchthattheagentcanbelegallyservedatthataddress? Yes,checkabove 3-Hasthelistedagentclearlyagreedinwritingtoserveastheagentforthegranteeatthataddress? Yes,itisincludedintheexhibit"C5266091_X23_Ed1_US_Agent_Letter"

C5266091_X10_Ed.2 1/1 GuangzhouYulinTradingCo.,Ltd OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 Date:2026.6.10 Subject:RequestforConfidentiality FCCID:2BOUH-WWF-OF ToWhomItMayConcern, PursuanttotheprovisionsofSections0.457and0.459ofCommission'srules (47CFR0.457,0.459),wearerequestingtheCommissiontowithholdthefollowing attachment(s)asconfidentialdocumentfrompublicdisclosure. ExhibitsLong-Term Confidentiality Short-Term Confidentiality NOTE2 IDLabel/LocationNoNo AttestationStatementNoNo ExternalPhotosNo ☐ BlockDiagram ☒☐ Schematics ☒☐ TestReportNoNo TestSetupPhotosNo ☐ User’sManual ☐ NOTE 1 ☐ InternalPhotos ☐ NOTE 1 ☐ PartsList/TuneUp ☐☐ RFExposureInfoNoNo OperationalDescription ☒☐ CoverLetter(s)NoNo SDRSoftware/SecurityInfo ☐ No NOTE1:Long-TermConfidentialitymaybepermittedunderspecialconditions(SeeII.LONG-TERMCONFIDENTIALITY,Section3of KDB726920,uselastinforce) NOTE2:Short-TermConfidentialitycanberequestedforamaximumof180daysfromthedateofthegrant. Abovementioneddocumentcontainsdetailedsystemandequipmentdescriptionare consideredasproprietaryinformationinoperationoftheequipment.Thepublic disclosureofabovedocumentsmightbeharmfultoourcompanyandwouldgive competitoranunfairadvantageinthemarket. Incaseofshort-termConfidentiality,theapplicantrequeststheexhibitsselected abovearewithheldfrompublicviewforaperiodof______daysfromthedateofthe GrantofEquipmentAuthorizationandpriortomarketing. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondentduringcertificationreviewprocesscannotbegrantedasconfidential documentsandthoseinformationwillbeavailableforpublicreviewoncethegrantof equipmentauthorizationisissued. C5266091_X10_Ed.2 1/1 Sincerely, Signature: Name:comyxiao Title:Manager

C5266091_X8_Ed.1 1/1 LetterofAuthorization GuangzhouYulinTradingCo.,Ltd Company:GuangzhouYulinTradingCo.,Ltd Address:No.106FengzeEastRoad,NanshaDistrict,Guangzhou X1301-C010770,GuangdongChina ProductName:Remote ModelNumber:WWF-OF FCCIdentifier:2BOUH-WWF-OF WeauthorizeLGAITechnologicalCenterS.A.,RondadelaFontdelCarme,s/n, 08193Bellaterra,Spain,toactonourbehalfonallmattersconcerningthe abovenamedequipment. AnyindividualwithinLGAITechnologicalCenterS.A.isauthorizedtoactonour behalfandtakeactionontheapplication. WedeclarethatauthorizeLGAITechnologicalCenterS.A.,RondadelaFontdel Carme,s/n,08193Bellaterra,Spain,isallowedtoforwardallinformation relatedtotheapprovalprojecttotheFederalCommunicationCommissionand todiscussanyissuesconcerningtheapprovalapplication.Anyandallacts carriedoutbyLGAITechnologicalCenterS.A.onourbehalfshallhavethe sameeffectasactsofourown. Name:comyxiaoDate:2026.6.10 Title:Manager Signatureofapplicant:

EUTPHOTO(ExternalPhotos) TestModel:WWF-OF ※※※※※ENDOFREPORT※※※※※

Labelandlabellocation FCCIDLABEL: High:1cm Wide:2cm LabelLocation: FCCID:2BOUH-WWF-OF

EUTPHOTO(InternalPhotos) TestModel:WWF-OF ※※※※※ENDOFREPORT※※※※※ ANT

FCCID:2BOUH-WWF-OF RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093, UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone 1-gheadorbodyand10-gextremitySARevaluationforgeneralpopulationexposure conditions,bymeasurementornumericalsimulation,isnotrequiredwhenthe correspondingSARTestExclusionThresholdcondition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤50mm,the1-gand10-gSARtest exclusionthresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]*[√f (GHz) ]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f (GHz) istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Here, For433.92MHz Frequency (MHz) ElectricField (dBuV/m) Power (dBm) Power (mW) Min.Distance (mm) Calc.thresholdsLimit 433.9240.48-54.720.000003450.000000443.0 Remark:dBuV/mtodBm,dBm=dBuV/m-95.2; Conclusion: 1.[(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]*[√f(GHz)]<3.0. 2.SARTestExclusionThresholdsis3.0forseparationdistance5mm.Therefore,SAR testisnotrequired.

ReportNo.:ZKT-2605261152E Page 1 of 31 FCCTESTREPORT FCCID:2BOUH-WWF-OF ReportNumber.....................................: ZKT-2605261152E DateofTest.......................................................:May26,2026toJun.02,2026 Dateofissue.........................................:Jun.02,2026 Totalnumberofpages .......................... 31 TestResult..........................................: PASS TestingLaboratory............................: ShenzhenZKTTechnologyCo.,Ltd. Address ............................................... : 1/F,No.101,BuildingB,No.6,TangweiCommunityIndustrialAvenue, FuhaiStreet,Bao'anDistrict,Shenzhen,China Applicant'sname ............................. : GuangzhouYulinTradingCo.,Ltd Address ............................................... : No.106FengzeEastRoad,NanshaDistrict,Guangzhou X1301-C010770,Guangdong,China Manufacturer'sname ...................... : GuangzhouYulinTradingCo.,Ltd Address...............................................: No.106FengzeEastRoad,NanshaDistrict,Guangzhou X1301-C010770,Guangdong,China Testspecification: Standard ................................................ : FCCCFRTitle47Part15SubpartCSection15.247 ANSIC63.10-2020+Cor1-2023 Testprocedure.....................................: / Non-standardtestmethod ................ :N/A TestReportFormNo. ....................... : TRF-EL-111_V0 TestReportForm(s)Originator.....: ZKTTesting MasterTRF........................................: Dated:2020-01-06 ThisdevicedescribedabovehasbeentestedbyZKT,andthetestresultsshowthattheequipmentundertest (EUT)isincompliancewiththeFCCrequirements.Anditisapplicableonlytothetestedsampleidentifiedin thereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofZKT,thisdocumentmaybe alteredorrevisedbyZKT,personalonly,andshallbenotedintherevisionofthedocument. Productname.....................................:Remote Trademark ........................................... :GOCHIFIX Model/Typereference.........................: WWF-OF Ratings..................................................:Input:DC3V ReportNo.:ZKT-2605261152E Page 2 of 31 Testingprocedureandtestinglocation: TestingLaboratory.......................................: ShenzhenZKTTechnologyCo.,Ltd. Address............................................................:1/F,No.101,BuildingB,No.6,TangweiCommunity IndustrialAvenue,FuhaiStreet,Bao'anDistrict, Shenzhen,China JimLiuTestedby(name+signature).......................: JacksonFang Reviewer(name+signature).......................: LakeXie Approved(name+signature) ....................... : ReportNo.:ZKT-2605261152E Page 3 of 31 TableofContentsPage 1.VERSION...................................................................................................................5 2.SUMMARYOFTESTRESULTS...............................................................................6 2.1TESTFACILITY.................................................................................................................7 2.2MEASUREMENTUNCERTAINTY....................................................................................7 3.GENERALINFORMATION........................................................................................8 3.1GENERALDESCRIPTIONOFEUT.................................................................................8 3.2TESTCHANNEL...............................................................................................................9 3.3DESCRIPTIONOFTESTMODES....................................................................................9 3.4BLOCKDIGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED..............9 3.5DESCRIPTIONOFSUPPORTUNITS(CONDUCTEDMODE)........................................9 3.6EQUIPMENTSLISTFORALLTESTITEMS.................................................................10 4.EMCEMISSIONTEST.............................................................................................12 4.1CONDUCTEDEMISSIONMEASUREMENT..................................................................12 4.1.1POWERLINECONDUCTEDEMISSIONLIMITS..................................................12 4.1.2TESTPROCEDURE...............................................................................................13 4.1.3DEVIATIONFROMTESTSTANDARD..................................................................13 4.1.4TESTSETUP...........................................................................................................13 4.1.5EUTOPERATINGCONDITIONS...........................................................................13 4.1.6TESTRESULTS......................................................................................................13 4.2RADIATEDEMISSIONMEASUREMENT......................................................................14 4.2.1RADIATEDEMISSIONLIMITS...............................................................................14 4.2.2TESTPROCEDURE...............................................................................................16 4.2.3TESTSETUP...........................................................................................................16 4.2.4EUTOPERATINGCONDITIONS...........................................................................17 4.2.5TESTRESULTS......................................................................................................18 5.20DBOCCUPIEDBANDWIDTH.............................................................................23 5.1APPLIEDPROCEDURES/LIMIT.............................................................................23 5.2TESTPROCEDURE..................................................................................................23 5.3DEVIATIONFROMSTANDARD...............................................................................23 5.4TESTSETUP..............................................................................................................23 5.5EUTOPERATIONCONDITIONS................................................…

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Productspecification QuickReferenceDate Antennamoduleonthesystemboard FrequencRange433.92MHz Ant.PortInputPwr.(dBm) 0(Typ.BTclass2outputpower) Gain(dBi) 0 Efficiency(dB)60.2% RemoteControlManufacturer:ShenzhenJingzhongyeElectronicsCo.,Ltd. Address:5thFloor,Building1,No.30MeihuaRoad,Baishi xiaEastDistrict,Fuyong,Bao'anDistrict, Shenzhen,Guangdong,China Avg.Power(dBm) -0.5(XY-plane) InputImpendence(ohm) 50 PolarizationType Vertical&Horizontal V.S.W.R<1.4 Applicant:GuangzhouXingyiElectronicTechnologyCo.,Ltd. Address: 4th&16thFloors,Building2,YudongSci-TechPark,No.3Ketai1st Road,BaiyunDistrict,Guangzhou. Allthetechnicaldataandinformationcontainedhereinaresubjecttochange withoutpriornotice AntennaLayout&moduleonthesystemboard TheEnvironmentofAntennaRadiationPattern

EUTTESTPHOTO TestModel:WWF-OF