2BTCP-DX-286High-Performance Digital Receiver

CERTIFICATIONDESIGNATINGAU.S.AGENTFORSERVICEOFPROCESS No.:BKCUS20251202001 Date:Dec.2,25 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,Maryland21046 FCCID:2BTCP-DX-286 ToWhomItMayConcern: Asrequiredbysection2.911(d)(7),we[HUIZHOUKEDUOSHENGTECHNOLOGYCO., LTD NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY, HUIZHOUCITY,GUANGDONGPROVINCE,CHINA.FRN:0037683901]certifies thatweacknowledgethedesignationofacontactlocatedintheUnitedStatesfor purposesofactingastheapplicant’sagentforserviceofprocess.We[HUIZHOU KEDUOSHENGTECHNOLOGYCO.,LTD]acceptstomaintainanagentfornolessthan oneyearafterthegranteehasterminatedallmarketingandimportationorthe conclusionofanyCommission-relatedproceedinginvolvingtheequipment. Asrequiredbysection2.911(d)(7),we[PacificUnionTechnologies&TradingINC., 1942BroadwaySt ， STE314CBoulderCOLORADO80302UnitedStates,FRN: 0034734624]certifiesthatweacknowledgeourobligationactingastheapplicant’s agentforserviceofprocessfortheabovereferencedFCCID.We[PacificUnion Technologies&TradingINC.]confirmthatwearenotassociatedwithorpartofany TCBorFCCrecognisedtestlab. Thankyouforyourattentiontothismatter. Sincerelyyours, SignaturebyapplicantSignaturebydesignatedagent(ifdifferent fromapplicant) PrintedName:De'anZengPrintedName:XIONGLU Company:HUIZHOUKEDUOSHENG TECHNOLOGYCO.,LTD Company:PacificUnionTechnologies& TradingINC. JobTitle:ManagerJobTitle:Director Email:[email protected]:[email protected] Telephone:15360960760Telephone:+1-3034148533

HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY,HUIZHOU CITY,GUANGDONGPROVINCE,CHINA) AttestationStatements NotCoveredEntityApplicant&NotCoveredEquipment To:FederalCommunicationsCommissionDate:Dec.4,25 7435OaklandMillsRoad, Columbia,MD21046,USA Ref:InformationRequiredbySection2.911(d)(5)(i)&(ii) FCCID:2BTCP-DX-286 HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD(“theapplicant”)certifiesthat,asofthedateof thefilingoftheapplication,theapplicantisnotidentifiedontheCoveredList,establishedpursuantto§ 1.50002ofreferencechapter,asanentityproducing“covered”communicationequipment.The equipmentforwhichauthorizationissoughtisnot“covered”telecommunicationsequipmentandvideo surveillanceequipmentproducedbyentitiesidentifiedontheCommission’sCoveredListthatprohibited fromreceivinganequipmentauthorizationpursuanttosection§2.903oftheFCCrules. Sincerelyyours, ApplicantSignature PrintedName:De'anZeng Title:Manager Address:NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY,HUIZHOU CITY,GUANGDONGPROVINCE,CHINA Tel.:15360960760 Email:[email protected]

HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY,HUIZHOU CITY,GUANGDONGPROVINCE,CHINA) 1|Page AttestationStatements To:FederalCommunicationsCommissionDate:Dec.4,25 7435OaklandMillsRoad, Columbia,MD21046,USA Subject:AttestationofCompliancewithFCCCoveredListSoftwareRequirements FCCID:[2BTCP-DX-286] ProductName:[High-PerformanceDigitalReceiver] Thisletterservesasanattestationthattheequipmentidentifiedabove☐is/☒isnot(selectone)"covered" softwareasdefinedundertheFederalCommunicationsCommission(FCC)CoveredListrequirements,as outlinedinFCC22-84andKDB986446. Specifically,theundersignedcertifiesthattheequipmentforwhichauthorizationissought: 1.Doesnotcontaincybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab, Inc.oranyofitssuccessors,assignees,parents,subsidiaries,affiliates,oranyentitythathasrebranded orrelabeledsoftwareproducedbytheaforementionedentities. 2.Doesnothavethecapabilitytostore,run,ordeliveranysoftwareidentifiedontheFCCCoveredList, includingbutnotlimitedtocybersecurityandanti-virussoftware. Tosupportthisattestation,theappendixevaluationdocumentationhasbeenpreparedandisincludedinthe certificationfiling. Thisattestationisbasedonathoroughevaluationofthedevice'sdesign,functionality,andsoftware environment.Theundersignedaffirmsthattheinformationprovidedisaccurateandcompletetothebestof theirknowledge. Sincerelyyours, ApplicantSignature PrintedName:De'anZeng Title:Manager Address:NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY,HUIZHOU CITY,GUANGDONGPROVINCE,CHINA Tel.:15360960760 Email:[email protected] HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY,HUIZHOU CITY,GUANGDONGPROVINCE,CHINA) 2|Page EvaluationregardingtotheCoveredListSoftware: Compliance Methodology EvaluationProcessResults Deviceis Inherent compliance ☒ TheChipset(s)usedislimitedtorun theCybersecurityoranti-virus software. Compliance ☐ TheMemoryusedislimitedtorunthe Cybersecurityoranti-virussoftware. ☐ Thereisstoragecapacitylimitationfor storeorinstalltheCybersecurityor anti-virussoftware. ☐ Operatingsystemusedislimitedto run,installordelivertheCybersecurity oranti-virussoftware. Deviceisnot Inherent compliance ☐ EvaluationBasedonSoftware BillofMaterials(SBoM) ☐ EvaluationBasedonScanfor Softwareonthedevice ☐ EvaluationBasedonFilesystemscan ☐ EvaluationBasedonRunning softwarecheck SBOM(SoftwareBillofMaterials)[ForDeviceisnotInherentcompliance] SectionComponentNameVersionSupplier 1/// 2/// 3///

HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY, HUIZHOUCITY,GUANGDONGPROVINCE,CHINA) (Dec.3,25) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:AgentAuthorizationforFCCID:2BTCP-DX-286 I,theundersigned,herebyauthorize(ShenzhenBKCTestingCo.,Ltd.)toactonourbehalfinallmatters relatingtothisapplicationforequipmentcertification. Anyactcarriedoutby(ShenzhenBKCTestingCo.,Ltd.)shallhavethesameeffectasourownandI acknowledgethatallresponsibilityforcomplyingwiththetermsandconditionsofcertification,as specifiedbyDERYCOMCERTIFICATIONSERVICES,INC.,stillresideswith(HUIZHOUKEDUOSHENG TECHNOLOGYCO.,LTD). WecertifythatwearenotsubjecttoadenialoffederalbenefitsthatincludesFCCbenefitspursuantto Section5301oftheAnti-DrugAbuseActof1988,21U.S.C.§862,andthatnopartytotheapplication,as definedin47CFR§1.2002(b),issubjecttoadenialoffederalbenefitsthatincludesFCCbenefits pursuanttothatsection. Sincerely, (Signature) (FullnameofcontactpersonlistedonFCC’swebsite) (Title)Manager Tel:15360960760 Fax: Email:[email protected]

HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY, HUIZHOUCITY,GUANGDONGPROVINCE,CHINA ) ModelDifferenceDeclaration Productname: High-PerformanceDigitalReceiver Modelname: DX-286,SR-286,TR-286,SR-286S,SR-286X,QD-286 We(HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD) herebystatethatallthemodelsareelectricalidenticalincluding thesamesoftwareparameterandhardwaredesign(i.e.,circuit design,PCBLayout,RFmodule/circuit,antennatype(s)and antennalocation,componentsonPCB,etc.,),Onlythemodel namesaredifferent Signature: Name:De'anZeng Title:Manager Address:NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY, HUIZHOUCITY,GUANGDONGPROVINCE,CHINA (Title)Manager Tel:15360960760 Fax: Email:[email protected] Date:2025-12-04

HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY, HUIZHOUCITY,GUANGDONGPROVINCE,CHINA) 2025-09-16 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:ConfidentialityRequestfor:FCCID:2BTCP-DX-286 PursuanttoSections0.457and0.459oftheCommission’sRules,weherebyrequestpermanent confidentialtreatmentoftheexhibitsaccompanyingthiscertificationapplicationasoutlinedbelow: BlockDiagram  Schematics OperationalDescription Theaboveexhibitscontaintradesecretsand/orproprietaryinformationthatarenotpubliclyavailableand materialsthattheApplicanthasspentconsiderableeffortsindeveloping.Publicdisclosureofthesemay beharmfultotheApplicantandgiveanunfairadvantagetocompetitorsonthemarket. PursuanttoDA04-1705,theapplicantalsorequeststemporaryconfidentialtreatmentoftheexhibits outlinedbelowforaperiodof(upto180)daysfromthedateofequipmentauthorizationandpriorto marketingintheUnitedStatestopreventtheprematurereleaseofanysensitiveinformation.Applicantis awareoftheirresponsibilitytonotifyDERYCOMintheeventinformationregardingtheproductorthe productismadeavailabletothepublicbeforetherequestedperiodhasexpired. UserManual InternalPhotos ExternalPhotos TestSetupPhotos Sincerely, (Signature) Title:manager Address:NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN,BOLUOCOUNTY, HUIZHOUCITY,GUANGDONGPROVINCE,CHINA Tel.:15360960760 Email:[email protected]

3cm 1cm Thelabelinformationisprovidedintheinstructionmanual. FCCID:2BTCP-DX-286

ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC25115053LE TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage1of19 TESTREPORT Applicant:HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD Address: NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN, BOLUOCOUNTY,HUIZHOUCITY,GUANGDONGPROVINCE, CHINA Manufacturer:HUIZHOUKEDUOSHENGTECHNOLOGYCO.,LTD Address: NIUJIAOFU,YEWUZU,ZHONGGANGVILLAGE,SHIWANTOWN, BOLUOCOUNTY,HUIZHOUCITY,GUANGDONGPROVINCE, CHINA ProductName: High-PerformanceDigitalReceiver ModelNumber: DX-286,SR-286,TR-286,SR-286S,SR-286X,QD-286 Trademark:QODOSEN FCCID:2BTCP-DX-286 TestDate : Nov.24,2025-Nov.29,2025 DateofReport : Dec.02,2025 TestResult: Theequipmentundertestwasfoundtobecompliancewiththe requirementsofthestandardsapplied. TestProcedureUsed: FCCPart15SubpartB ANSIC63.4:2014 Preparedby(TestEngineer): StenHuang Approved(Manager): CaseyWang Approved(Manager): JerryLiao ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC25115053LE TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage2of19 TABLEOFCONTENT TestReportDeclarationPage 1.GENERALINFORMATION....................................................................................................4 1.1.Customerbasicinformation...................................................................................................................4 1.2.DescriptionofDevice(EUT)..................................................................................................................4 1.3.IndependentOperationModes..............................................................................................................4 1.4.TESTSUMMARY....................................................................................................................................5 1.5.SpecialAccessoriesandAuxiliaryEquipment....................................................................................5 1.6.TestUncertainty.......................................................................................................................................5 1.7.TestFacility...............................................................................................................................................6 2.TESTINSTRUMENTUSED...................................................................................................7 3.CONDUCTEDEMISSIONATTHEMAINSTERMINALSTEST.....................................8 3.1.BlockDiagramOfTestSetup................................................................................................................8 3.2.TestStandard...........................................................................................................................................8 3.3.PowerLineConductedEmissionLimit................................................................................................8 3.4.EUTConfigurationonTest.....................................................................................................................8 3.5.OperatingConditionofEUT...................................................................................................................8 3.6.TestProcedure.........................................................................................................................................9 3.7.TestResult................................................................................................................................................9 4.RADIATIONEMISSIONTEST.............................................................................................12 4.1.BlockDiagramofTestSetup...............................................................................................................12 4.2.TestStandard.........................................................................................................................................13 4.3.RadiationLimit.......................................................................................................................................13 4.4.EUTConfigurationonTest...................................................................................................................13 4.5.OperatingConditionofEUT.................................................................................................................13 4.6.TestProcedure.......................................................................................................................................13 4.7.TestResult..............................................................................................................................................14 5.TESTPHOTOGRAPHS........................................................................................................19 6.PHOTOGRAPHS....................................................................................................................19 ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC25115053LE TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage3of19 RevisionHistoryofThisTestReport ReportNumberDescriptionIssuedDate BKC25115053LEInitialIssue2025-12-02 ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC25115053LE TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage4of19 1.GENERALINFORMATION 1.1.Customerbasicinformation Contacts:/ E-Mail:/ Telephone:/ 1.2.DescriptionofDevice(EUT) EUT:High-PerformanceDigitalReceiver ModelNumber:DX-286,SR-286,TR-286,SR-286S,SR-286X,QD-286 ModelDifference:Onlythemodelnamesaredifferent. Trademark:QODOSEN PowerSupply:DC3.7VFromthebatteryorDC5VfromUSBport WorkFrequency:Below108MHz Note: 1)EUT:Equipmentundertest 2)DX-286wasselectedasthetestmodelandthedatashavebeenrecordedinthisreport. 1.3.IndependentOperationModes TestVoltage:AC120V/60Hz TestModeA:ONMode TestModeB:Chargingmode Remark:Thetestdataoftheworstcasecondition(s)wasreportedonthefollowingpage. ShenzhenBKCTestingCo.,Ltd.ReportNo.:BKC25115053LE TestReportTel:4000-875-3820755-84829082Web:Http://www.bkc-lab.comPage5of19 1.4.TESTSUMMARY TestProceduresAccordingToTh…

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