2BROZ-BT1-YBBT1

ZhejiangZhaochenTechnologyCo.,Ltd Address：2ndFloor,No.9HouxiRoad,NiansanliStreet,YiwuCityJinhuaChina FRN:0037403979 Date:2026-06-15 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Ref:AttestationStatementsPart2.911(d)(7)Filing SUBJECT:FCCApplicationforFCCID:2BROZ-BT1-YB ZhejiangZhaochenTechnologyCo.,Ltdcertifiesthat,asofthedateofthefilingofthe application,XINNAISIINCisourdesignatedU.S.agentforserviceofprocessfortheabove referencedFCCID.ZhejiangZhaochenTechnologyCo.,Ltdacceptstomaintainanagentfor nolessthanoneyearafterthegranteehasterminatedallmarketingandimportationorthe conclusionofanyCommission-relatedproceedinginvolvingtheequipment. XINNAISIINCaccepts,asofthedateofthefilingoftheapplication,theobligationofthe designatedU.S.agentforserviceofprocessfortheabovereferencedFCCID. DesignatedU.S.AgentInformation: Name:XINNAISIINC Address:1500NGRANTSTSTER,DENVER,CO80203 FRN:0037518289 ContactPerson:KiKi Tel.:+01(951)893-3011 Email:[email protected] Sincerely, ZhejiangZhaochenTechnologyCo.,Ltd SignedonbehalfofXINNAISIINC YangNingkang KiKi Name:Name: Title:ManagerTitle:Manager Date:2026-06-15Date:2026-06-15

Rev1/26/2023 (ZhejiangZhaochenTechnologyCo.,Ltd) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:06-15-2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:( 2BROZ-BT1-YB ) [ZhejiangZhaochenTechnologyCo.,Ltd]certifiesthattheequipmentforwhichauthorizationissought isnot“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuanttosection 2.903oftheFCCrules. [ZhejiangZhaochenTechnologyCo.,Ltd]certifiesthattheequipmentforwhichauthorizationissought doesnotincludecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc.orany ofitssuccessorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyofits successorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446 D01CoveredEquipmentGuidancesectionB(2a). Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, (YangNingkang) Rev1/26/2023 (ZhejiangZhaochenTechnologyCo.,Ltd) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:06-15-2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:(2BROZ-BT1-YB) [ZhejiangZhaochenTechnologyCo.,Ltd]certifiesthat,asofthedateofthefilingoftheapplication,the applicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofitssubsidiariesor affiliates)asanentityproducing“covered”equipment. Sincerely, (YangNingkang)

ZhejiangZhaochenTechnologyCo.,Ltd Date ： 06-15-2026 ProductModelNumber: BT1-YB FCCID：2BROZ-BT1-YB Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By: ContactListedonFCCWesbite YangNingkang Title:Manager Email:[email protected] Telephone: +8615048500118 Onbehalfof:ZhejiangZhaochenTechnologyCo.,Ltd

ZhejiangZhaochenTechnologyCo.,Ltd OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:June15,2026 Subject;RequestforConfidentiality FCCID:2BROZ-BT1-YB ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthese documentsmightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantage inthemarket. SchematicDiagram BlockDiagram PartsList OperationalDescription Tune-upProcedure SoftwareSecurityRequirementsforUNIIdevices Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); ExternalPhotos TestSetupPhotos InternalPhotos UserManual For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:YangNingkang Title:Manager

ZhejiangZhaochenTechnologyCo.,Ltd ModelDifferenceLetter Date:2026/06/15 ProductName:BT1 Model: BT1-YB,BT1-Black EquipmentDescription:BT1 FCCID: 2BROZ-BT1-YB Towhomitmayconcern, Wedeclare ModelsBT1-YBandBT1-BlackOnlythemodelandcolordiffer.ThePCBlayout,electrical schematicsandRFcomponentsarecompletelyidentical. Appear By: ContactListedonISEDWesbite YangNingkang Title:Manager Email:[email protected] Telephone:+8615048500118 Onbehalfof:ZhejiangZhaochenTechnologyCo.,Ltd

FCCID:2BROZ-BT1-YB Size:8*5mm ProductName ： BT1 Model ： BT1-YB FCCID ： 2BROZ-BT1-YB

Model:BT1-YBFCCID:2BROZ-BT1-YB RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093 ， Unless specificallyrequiredbythepublishedRFexposureKDBprocedures,standalone1-gheadorbody and10-gextremitySARevaluationforgeneralpopulationexposureconditions,bymeasurementor numericalsimulation,isnotrequiredwhenthecorrespondingSARTestExclusionThreshold condition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤50mm,the1-gand10-gSARtestexclusion thresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f(GHz)]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Here, ThedevicehasbeenevaluatedtomeetgeneralRFexposurerequirement.Thedevicecanbeused inportableexposureconditionwithoutrestriction. ForEDR Conclusion: Forthemaxresult:0.49918≤3.0for1-gSAR,NoSARisrequired. SoaSARtestisnotrequired Signature:Date:2026-06-11 NAMEANDTITLE(Pleaseprintortype):JasonChen/Manager COMPANY(Pleaseprintortype):ShenzhenATATestingLab.Inc./4thFloor,Building10,No.60Nanchang Road,NanchangCommunity,XixiangStreet,Bao'anDistrict,ShenzhenCity,China

Add:4thFloor,Building10,No.60NanchangRoad,NanchangCommunity,XixiangStreet,Bao'anDistrict,ShenzhenCity,Guangdong,People's RepublicofChina Tel:+860755-82828582Mobilephone:+8613728818899E-mail:[email protected]:www.certata.com TESTREPORT ReportNo............................................:ATA0126060901 FCCID······································:2BROZ-BT1-YB Applicant .............................................. : ZhejiangZhaochenTechnologyCo.,Ltd Address.............................................: 2ndFloor,No.9HouxiRoad,NiansanliStreet,YiwuCity,JinhuaCity, ZhejiangProvince Manufacturer......................................: ZhejiangZhaochenTechnologyCo.,Ltd Address.............................................: 2ndFloor,No.9HouxiRoad,NiansanliStreet,YiwuCity,JinhuaCity, ZhejiangProvince ProductName.....................................:BT1 TradeMark............................................:ARMNEXT TestModel ............................................. :BT1-YB SeriesModel(s) .................................... :BT1-Black Standard..............................................:FCCCFRTitle47Part15SubpartCSection15.247 Testprocedure...................................:ANSIC63.10-2020+Cor.1-2023 KDB558074D0115.247MeasGuidancev05r02 DateofReceipt .................................... :June.06,2026 DateofTestDate.................................:June.06,2026~June.11,2026 Dateofissue ......................................... :June.11,2026 Testresult............................................: Pass Compiledby: (Printedname+signature)LilyZheng Supervisedby: (Printedname+signature)TravisYoung Approvedby: (Printedname+signature)Jasonchen TestingLaboratoryName ................ : ShenzhenATATestingLab.Inc Address.................................................: 4thFloor,Building10,No.60NanchangRoad,Nanchang Community,XixiangStreet,Bao'anDistrict,ShenzhenCity, China Thistestreportmaybeduplicatedcompletelyforlegalusewiththeapprovaloftheapplicant.Itshouldnotbe reproducedexceptinfull,withoutthewrittenapprovalofourlaboratory.Theclientshouldnotuseittoclaim productendorsementbyATA.Thetestresultsinthereportonlyapplytothetestedsample.Thetestreport shallbeinvalidwithoutallthesignaturesoftestingengineers,reviewerandapprover.Anyobjectionsmustbe raisedtoATAwithin15dayssincethedatewhenthereportisreceived.Itwillnotbetakenintoconsideration beyondthislimit.Thetestreportmerelycorrespondtothetestsample. Page 2 of 77 ReportNo.:ATA0126060901 Add:4thFloor,Building10,No.60NanchangRoad,NanchangCommunity,XixiangStreet,Bao'anDistrict,ShenzhenCity,Guangdong,People's RepublicofChina Tel:+860755-82828582Mobilephone:+8613728818899E-mail:[email protected]:www.certata.com TABLEOFCONTENTSPage 1.TESTSUMMARY................................................................................................................................................................3 1.1.TESTSTANDARDS...................................................................................................................................................................3 1.2.REPORTVERSION...................................................................................................................................................................3 1.3.TESTDESCRIPTION.................................................................................................................................................................4 1.4.TESTFACILITY........................................................................................................................................................................5 2.GENERALINFORMATION...................................................................................................................................................6 2.1.GENERALDESCRIPTIONOFEUT...............................................................................................................................................6 2.2.DESCRIPTIONOFTHETESTMODES..................................................................................................................................7 2.3.BLOCKDIAGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED.........................................................................8 2.4.DESCRIPTIONOFNECESSARYACCESSORIESANDSUPPORTUNITS..................................................................................9 2.5.MEASUREMENTINSTRUMENTSLIST........................................................................................................................................10 2.5.TESTSOFTWARE..................................................................................................................................................................11 2.6.MEASUREMENTUNCERTAINTY...............................................................................................................................................12 2.7.ENVIRONMENTALCONDITIONS...............................................................................................................................................12 3.TESTITEMANDRESULTS.................................................................................................................................................13 3.1.ANTENNAREQUIREMENT......................................................................................................................................................13 3.2.CONDUCTEDEMISSION.........................................................................................................................................................14 3.3NUMBEROFHOPPINGCHANNEL ...................................................................................................................................17 3.4HOPPINGCHANNELSEPARATIONMEASUREMENT .......................................................................................................18 3.5 AVERAGETIMEOFOCCUPANCY(DWELLTIME) ...................................................................…

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FCCID:2BROZ-BT1-YB 1.GeneralDescription 1.1ProductInformation Manufacturer: ZhejiangZhaochenTechnologyCo.,Ltd Address: 2ndFloor,No.9HouxiRoad,NiansanliStreet,YiwuCity,JinhuaCity, ZhejiangProvince Productname: BT1-YB Modelname:/ Operationfrequency:2400-2483.5MHz Antennatype: PCBantenna Antennagain:0.15dBi Impedance:50ohm AntennaView: 18.17mm 6.82mm FCCID:2BROZ-BT1-YB 2.OTATest 2.1Gain Frequency(MHz)Gain(dBi)Polarity 2400-2.18Horizontal 2400-0.51Vertical 24420.15Horizontal 2442-0.97Vertical 2483.5-1.07Horizontal 2483.5-2.30Vertical FCCID:2BROZ-BT1-YB 2.2RadiationPatternView