2BRZL-MI104wireless microphone

JUMBOAUDIOELECTRONICSCO.,LTD. Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA ReferenceNo.2026UL0005 U.S.AgentLetterofAttestation To:FederalCommunicationsCommission 7435OaklandMillsRoad,Columbia,MD21046,USA Date:Apr.8,26 Ref:AttestationStatement–Part2.911(d)(7)filing FCCID:2BRZL-MI104 [JUMBOAUDIOELECTRONICSCO.,LTD.](“theapplicant”)certifiesthat,asofthedateofthefiling oftheapplication,[TTSMARKETINC.](“theagent”)isourdesignatedU.S.agentforserviceof processfortheabovereferenceFCCID.Theapplicantacceptstomaintainanagentforserviceof processintheUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanently terminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S.,orthe conclusionofanyCommission-relatedadministrativeorjudicialproceedinginvolvingtheequipment, whicheverislater.TheapplicantfurtheracknowledgesitisourresponsibilitytoinformtheFCC whenevertheagentinformationchanges. [TTSMARKETINC.]("theagent”)understanditistheagent'sobligationtoacceptserviceof processintheUnitedStatesformattersrelatedtotheapplicableequipment,andatthephysicalU.S. addressandemailaddress. DesignatedU.S.Agent CompanyName:TTSMARKETINC. FRN:0036806057 GC:N/A Address:1178BroadwaySte324,NewYork,NY 10001.USA ContactPerson:MaverickLim Tel:001-(646)305-2908 Applicant CompanyName:JUMBOAUDIOELECTRONICSCO.,LTD. FRN:0037462835 Address:NO.15YANGJIA,WANSHIXUVILLAGE, ZHUANGSHISTREET,ZHENHAIDISTRICT, NINGBO,CHINA Signature: ContactPerson: LiangqingZhu Tel:13777229469Email:[email protected]

JUMBOAUDIOELECTRONICSCO.,LTD. Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA AttestationStatements NotCoveredEntityApplicant&NotCoveredEquipment To:FederalCommunicationsCommissionDate:Apr.13,26 7435OaklandMillsRoad, Columbia,MD21046,USA Ref:InformationRequiredbySection2.911(d)(5)(i)&(ii) FCCID:2BRZL-MI104 JUMBOAUDIOELECTRONICSCO.,LTD.(“theapplicant”)certifiesthat,asofthedateofthefilingof theapplication,theapplicantisnotidentifiedontheCoveredList,establishedpursuantto§1.50002of referencechapter,asanentityproducing“covered”communicationequipment.Theequipmentfor whichauthorizationissoughtisnot“covered”telecommunicationsequipmentandvideosurveillance equipmentproducedbyentitiesidentifiedontheCommission’sCoveredListthatprohibitedfrom receivinganequipmentauthorizationpursuanttosection§2.903oftheFCCrules. Sincerelyyours, ApplicantSignature PrintedName:LiangqingZhu Title:Director Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA Tel:13777229469 Email:[email protected]

JUMBOAUDIOELECTRONICSCO.,LTD. Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA 1|Page AttestationStatements To:FederalCommunicationsCommissionDate:Apr.8,26 7435OaklandMillsRoad, Columbia,MD21046,USA Subject:AttestationofCompliancewithFCCCoveredListSoftwareRequirements FCCID:[2BRZL-MI104] ProductName:[ wirelessmicrophone ] 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:LiangqingZhu Title:Director Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA Tel:13777229469 Email:[email protected] JUMBOAUDIOELECTRONICSCO.,LTD. Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA 2|Page EvaluationregardingtotheCoveredListSoftware: Compliance Methodology EvaluationProcessResults Deviceis Inherent compliance ☒ TheChipset(s)usedislimitedtorun theCybersecurityoranti-virus software. Compliance ☒ TheMemoryusedislimitedtorunthe Cybersecurityoranti-virussoftware. Compliance ☒ Thereisstoragecapacitylimitationfor storeorinstalltheCybersecurityor anti-virussoftware. Compliance ☒ Operatingsystemusedislimitedto run,installordelivertheCybersecurity oranti-virussoftware. Compliance Deviceisnot Inherent compliance ☐ EvaluationBasedonSoftware BillofMaterials(SBoM) Seeattached“SBoM“ Note:TheSBoMcontentislimited tothescopeofcoveredlist software(e.g.antivirusand cybersecuritysoftware). ☐ EvaluationBasedonScanfor Softwareonthedevice ☐ EvaluationBasedonFilesystemscan ☐ EvaluationBasedonRunning softwarecheck

JUMBOAUDIOELECTRONICSCO.,LTD. Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA (Apr.08,2026) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:AgentAuthorizationforFCCID:2BRZL-MI104 I,theundersigned,herebyauthorize(ShenzhenNCTTestingTechnologyCo.,Ltd.)toactonour behalfinallmattersrelatingtothisapplicationforequipmentcertification. Anyactcarriedoutby(ShenzhenNCTTestingTechnologyCo.,Ltd.)shallhavethesameeffectas ourownandIacknowledgethatallresponsibilityforcomplyingwiththetermsandconditionsof certification,asspecifiedbyDERYCOMCERTIFICATIONSERVICES,INC.,stillresideswith (JUMBOAUDIOELECTRONICSCO.,LTD.). WecertifythatwearenotsubjecttoadenialoffederalbenefitsthatincludesFCCbenefitspursuantto Section5301oftheAnti-DrugAbuseActof1988,21U.S.C.§862,andthatnopartytotheapplication,as definedin47CFR§1.2002(b),issubjecttoadenialoffederalbenefitsthatincludesFCCbenefits pursuanttothatsection. Sincerely, (Signature) PrintedName:LiangqingZhu Title:Director Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA Tel:13777229469 Email:[email protected]

JUMBOAUDIOELECTRONICSCO.,LTD. ProductSimilarityDeclaration Productname:wirelessmicrophone Modelname:MI104,MI104A,MI104B,MI104C,MI104D,MI104T FCCID:2BRZL-MI104 We(JUMBOAUDIOELECTRONICSCO.,LTD.)herebystatethatallthe modelsareelectricalidenticalincludingthesamesoftware parameterandhardwaredesign(i.e.,circuitdesign,PCBLayout, RFmodule/circuit,antennatype(s)andantennalocation, componentsonPCB,etc.,),samemechanicalstructureand design(includingproductenclosure,materials,etc.,),theonly differenceisthemodelnumberandthecolour. Signature: Name:LiangqingZhu Title:Director Place,date:Enping,2026.04.08

JUMBOAUDIOELECTRONICSCO.,LTD. Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA (Apr.08,2026) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:ConfidentialityRequestfor:FCCID:2BRZL-MI104 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 Sincerely, (Signature) PrintedName:LiangqingZhu Title:Director Address:NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA Tel:13777229469 Email:[email protected]

Page 1 of 3 ShenzhenNCTTestingTechnologyCo.,Ltd. A101&2FB2,Fuqiao6thArea,XintianCommunity,FuhaiStreet,BaoanDistrict,Shenzhen,China Hotline:400-8868-419Fax:86-755-27790922http://www.ncttesting.cn FCCID:2BRZL-MI104ExternalPhotos Page 2 of 3 ShenzhenNCTTestingTechnologyCo.,Ltd. A101&2FB2,Fuqiao6thArea,XintianCommunity,FuhaiStreet,BaoanDistrict,Shenzhen,China Hotline:400-8868-419Fax:86-755-27790922http://www.ncttesting.cn Page 3 of 3 ShenzhenNCTTestingTechnologyCo.,Ltd. A101&2FB2,Fuqiao6thArea,XintianCommunity,FuhaiStreet,BaoanDistrict,Shenzhen,China Hotline:400-8868-419Fax:86-755-27790922http://www.ncttesting.cn

FCCID:2BRZL-MI104

Page 1 of 2 ShenzhenNCTTestingTechnologyCo.,Ltd. A101&2FB2,Fuqiao6thArea,XintianCommunity,FuhaiStreet,BaoanDistrict,Shenzhen,China Hotline:400-8868-419Fax:86-755-27790922http://www.ncttesting.cn FCCID:2BRZL-MI104InternalPhotos Page 2 of 2 ShenzhenNCTTestingTechnologyCo.,Ltd. A101&2FB2,Fuqiao6thArea,XintianCommunity,FuhaiStreet,BaoanDistrict,Shenzhen,China Hotline:400-8868-419Fax:86-755-27790922http://www.ncttesting.cn ANT

RFExposureEvaluationReport FCCID:2BRZL-MI104 AccordingtoKDB447498V06andpart2.1093 ， Unlessspecificallyrequiredbythe publishedRFexposureKDBprocedures,standalone1-gheadorbodyand10-gextremity SARevaluationforgeneralpopulationexposureconditions,bymeasurementornumerical simulation,isnotrequiredwhenthecorrespondingSARTestExclusionThreshold condition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤5mm,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, SoaSARtestisnotrequired ModeFrequen cy (MHz) Max Power (dBm) Targetpower W/tolerance (dBm) Maxtuneup power tolerance (dBm) Max Power (mW) Min. Distance (mm) Calc. thresholds limit DQPSK 470.15.756 5±1.0 6 3.98115.000.5459 3.0 533.45.616 5±1.06 3.98115.000.5815 3.0 607.93.283 4±1.05 3.16235.000.4931 3.0

Page 1 of 33 Hotline:400-8868-419http://www.ncttesting.cn FCCTESTREPORT FCCID:2BRZL-MI104 Product: wirelessmicrophone ModelName: MI104,MI104A,MI104B, MI104C,MI104D,MI104T Brand: N/A ReportNo.: NCT260051449E1-1 Preparedfor JUMBOAUDIOELECTRONICSCO.,LTD. NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA Preparedby ShenzhenNCTTestingTechnologyCo.,Ltd. A101&2FB2,Fuqiao6thArea,XintianCommunity,FuhaiStreet,BaoanDistrict, Shenzhen,People’sRepublicofChina TEL:400-8868-419 ReportNo.:NCT260051449E1-1 Page 2 of 33 Hotline:400-8868-419http://www.ncttesting.cn TESTRESULTCERTIFICATION Applicant’sname:JUMBOAUDIOELECTRONICSCO.,LTD. Address: NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA Manufacture'sname:JUMBOAUDIOELECTRONICSCO.,LTD. Address: NO.15YANGJIA,WANSHIXUVILLAGE,ZHUANGSHISTREET, ZHENHAIDISTRICT,NINGBO,CHINA Productname:wirelessmicrophone Modelname:MI104,MI104A,MI104B,MI104C,MI104D,MI104T Standards:FCCCFR47Part15Section15.236 Testprocedure:ANSIC63.10-2020+Cor1-2023 Dateoftest:Mar.03,2026-Apr.07,2026 DateofIssue:Apr.07,2026 ThisdevicedescribedabovehasbeentestedbyNCT,andthetestresultsshowthatthe equipmentundertest(EUT)isincompliancewiththeFCCrequirements.Anditisapplicableonlyto thetestedsampleidentifiedinthereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofNCT,thisdocument maybealteredorrevisedbyNCT,personalonly,andshallbenotedintherevisionofthedocument. TestEngineer: KevenWu/Engineer TechnicalManager: HenryWang/Manager ReportNo.:NCT260051449E1-1 Page 3 of 33 Hotline:400-8868-419http://www.ncttesting.cn TableofContentsPage TESTRESULTCERTIFICATION...................................................................................2 1.VERSION...................................................................................................................5 2.SUMMARYOFTESTRESULTS...............................................................................6 2.1TESTFACILITY.................................................................................................................7 2.2MEASUREMENTUNCERTAINTY....................................................................................7 3.GENERALINFORMATION.........................................................................................8 3.1GENERALDESCRIPTIONOFEUT.................................................................................8 3.2DESCRIPTIONOFTESTMODES....................................................................................9 3.3BLOCKDIGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED..............9 3.4DESCRIPTIONOFSUPPORTUNITS(CONDUCTEDMODE)........................................9 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 4.2.1RADIATEDEMISSIONLIMITS...............................................................................14 4.2.3TESTSETUP...........................................................................................................15 4.2.4TESTPROCEDURE...............................................................................................15 4.2.5TESTRESULTS....................................................................................................15 5.MAXIMUMRADIATEDPOWER(EIRP)...................................................................20 5.1APPLIEDPROCEDURES/LIMIT.............................................................................20 5.2TESTPROCEDURE..................................................................................................20 5.3DEVIATIONFROMSTANDARD...............................................................................20 5.4TESTSETUP..............................................................................................................20 5.5EUTOPERATIONCONDITIONS..............................................................................20 5.6TESTRESULTS.........................................................................................................21 6.CHANNELBANDWIDTH....................................................................................23 7.NECESSARYBANDWIDTH....................................................................................26 7.1LIMIT................................................................................................................................26 7.2TESTSETUP...................................................................................................................28 7.3TESTPROCEDURE........................................................................................................28 ReportNo.:NCT260051449E1-1 Page 4 of 33 Hotline:400-8868-419http://www.ncttesting.cn TableofContentsPage 7.4TESTRESULTS..............................................................................................................28 8.FREQUENCYSTABILITY........................................................................................31 9.TESTPHOTO&EUTPHOTO.................................................................................33 ReportNo.:NCT260051449E1-1 Page 5 of 33 Hotline:400-8868-419http://www.ncttesting.cn 1.VERSION ReportNo.VersionDescriptionApproved NCT260051449E1-1Rev.01…

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天线参数 AntennaSpecification 470-608MHz 天线参数 AntennaSpecification 规格 Size ：Φ 7mmx6T 材质 Materials ： 碳钢 carbon steel 阻抗 Impedance ： 50 Ω 驻波比 SWR ：≤ 2 增益 Gain ： -2.71dBi 最大功率 Max.Power ： 10mW 工作温度 Temperature ： -40~+80 °C MechanicalDimensionDrawing 天线增益与效率 Antennagainandefficiency Frequency (MHz) Efficiency (%) Gian (dBi) 300 MHz 15.67-3.19 350 MHz 14.83-3.17 400 MHz 14.14-3.24 450 MHz 16.41-2.83 500 MHz 18.13-2.89 550 MHz 15.75-2.71 600 MHz 13.69-3.41 650 MHz 11.57-4.23 700 MHz 10.37-4.89 750 MHz 9.25-5.34 800 MHz8.74-5.63 天线类型 Antenna Type ： 弹簧天线 Spring Antenna 天线方向图 Antennaradiationpattern

Page1of1 ShenzhenNCTTestingTechnologyCo.,Ltd. A101&2FB2,Fuqiao6thArea,XintianCommunity,FuhaiStreet,BaoanDistrict,Shenzhen,China Hotline:400-8868-419Fax:86-755-27790922http://www.ncttesting.cn FCCID:2BRZL-MI104TestPhoto