2BTKG-0085signal amplifier

0085 signal amplifier FCC Caution: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception,which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna. -- Increase the separation between the equipment and receiver. -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. To maintain compliance with FCCs RF Exposure guidelines, This equipment should be installed and operated with minimum distance between 20cm the radiator your body: Use only the supplied antenna.

CoveredEquipmentCertificationAttestationLetter 2025.12.16 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA ATTN.:ReviewingEngineer FCCID:2BTKG-0085 ShenzhenMaijindeE-commerceCo.,Ltd(“theapplicant”)certifiesthattheequipmentfor whichauthorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. ShenzhenMaijindeE-commerceCo.,Ltd(“theapplicant”)certifiesthat,asofthedateof thefilingoftheapplication,theapplicantisnotidentifiedontheCoveredListasanentity producing“covered”equipment. ShenzhenMaijindeE-commerceCo.,Ltd(“theapplicant”)certifiesthattheequipmentfor whichauthorizationissoughtdoesnotincludecybersecurityoranti-virussoftware producedorprovidedbyKasperskyLab,Inc.oranyofitssuccessorsandassignees, includingequipmentwithintegratedKasperskyLab,Inc.(oranyofitssuccessorsand assignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446 D01 CoveredEquipmentGuidancesectionB(2a). Signed: Printedname:YujuLuo Title:Juridicalperson CompanyName:ShenzhenMaijindeE-commerceCo.,Ltd Date:2025.12.16

2025.12.16 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2BTKG-0085 ProductName:signalamplifier RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommission’srules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: (Listherethedocumentsforwhichyouareseekingconfidentiality–forexample...) Schematics Blockdiagram  Operationdescription Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. Name:YujuLuo Title:Juridicalperson Company:ShenzhenMaijindeE-commerceCo.,Ltd

2025.12.16 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 RE:LETTEROFAGENTAUTHORIZATION ToWhomItMayConcern: We,theundersigned,herebyauthorizeShenzhenBangceTestingTechnologyCo.,Ltd.toacton ourbehalfinallmattersrelatingtoapplicationforequipmentauthorization,includingthesigningofall documentsrelatingtothesematters. Wealsoherebycertifythatnopartytotheapplicationauthorizedhereunderissubjecttothedenialof benefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuseActof1988,21 U.S.C.853(a). Sincerely, Name:YujuLuo Title:Juridicalperson Company:ShenzhenMaijindeE-commerceCo.,Ltd

version01 ShenzhenMaijindeE-commerceCo.,Ltd Modeldifferencestatement Itisherebydeclaredthattheproduct FCCID:2BTKG-0085 ProductName:signalamplifier Model(s):0085,666,888,6660,8880,6688,6868,8686,8866,8899,9988,9898,8989,0165 Mark:/ Thenyareelectricalidentical,theSchematic,PCBlayout,structureandsoftwarearesame,onlythe differenceisthemodelnameformarketpurpose. Sincerely, Signature Name:YujuLuo Title:Juridicalperson ApplicantCompany:ShenzhenMaijindeE-commerceCo.,Ltd

ReportNo.:CISRR25101404001 Page 68 of 71 9.EXTERNALANDINTERNALPHOTOS 9.1.ExternalPhotos ReportNo.:CISRR25101404001 Page 69 of 71 ReportNo.:CISRR25101404001 Page 70 of 71

Label Size:20mm*16mm Productname:signalamplifier ModelNo.:0085 FCCID:2BTKG-0085 LabelLocation

ReportNo.:CISRR25101404001 Page 71 of 71 9.2.InternalPhotos ------Endofthereport----- ANT0 ANT1 ANT2 ANT3 ANT4 ANT5

ReportNo.: CISRR25101404002 Reporttemplateversion:CISE-TR-001-A0Page:1of6 TESTREPORT RFExposureEvaluation ReportNo.: CISRR25101404002 ProjectNo.: CISR251014040 FCCID:2BTKG-0085 Applicant:ShenzhenMaijindeE-commerceCo.,Ltd Address: 5C-221J,5/F,Bldg.210,TairanTechnologyParkNo.113Tairan4thRd.,Futian Dist.,Shenzhen,China Manufacturer: ShenzhenMaijindeE-commerceCo.,Ltd Address: 5C-221J,5/F,Bldg.210,TairanTechnologyParkNo.113Tairan4thRd.,Futian Dist.,Shenzhen,China ProductName: signalamplifier TradeMark:- Model/Typereference:0085 ListedModel(s): 666,888,6660,8880,6688,6868,8686,8866,8899,9988,9898,8989, 0085,0165 Standard:47CFRPart2.1091 Issuedate:December18,2025 Testresult:Complied Reviewedby:MorganTan Approvedby:HansHu Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangceTesting TechnologyCo.,Ltd. ReportNo.: CISRR25101404002 Reporttemplateversion:CISE-TR-001-A0Page:2of6 1.APPLICABLESTANDARD 47CFRPart2.1091:Radiofrequencyradiationexposureevaluation:mobiledevices ANSIC95.1–3999:IEEEStandardforSafetyLevelswithRespecttoHumanExposuretoRadioFrequency ElectromagneticFields,3kHzto300GHz. FCCKDBpublication447498D01GeneralRFExposureGuidancev06:MobileandPortableDevicesRF ExposureProceduresandEquipmentAuthorizationPolicies. 47CFRPart1.1307:Actionsthatmayhaveasignificantenvironmentaleffect,forwhichEnvironmental Assessments(EAs)mustbeprepared. 47CFRPart1.1310:Radiofrequencyradiationexposurelimits. 2.REPORTVERSION VersionNo.IssuedateDescription 00December18,2025Original ReportNo.: CISRR25101404002 Reporttemplateversion:CISE-TR-001-A0Page:3of6 3.RADIOSPECIFICATIONDESCRIPTION WIFI-2.4GHzBand Supportedtype:802.11b802.11g802.11n 802.11ax Note:PleaserefertoRFreportfordetailedtechnicalspecifications 4.SIMULTANEOUSTRANSMISSIONANALYSIS ThesedevicesuseasingletransmittermoduleandantennaforbothWLAN,WLANcannottransmit simultaneously. ReportNo.: CISRR25101404002 Reporttemplateversion:CISE-TR-001-A0Page:4of6 5.TESTRESULT 5.1.SARtestexclusionEvaluation ExclusionLimit: KDB447498D01v06,Clause4.3.1b) 100MHzto1500MHz {[Powerallowedatnumericthresholdfor50mminstepa)]+[(testseparation distance–50mm)·(f(MHz)/150)]}mW 1500MHzand≤6GHz {[Powerallowedatnumericthresholdfor50mminstepa)]+[(testseparation distance–50mm)·10]}mW Result: Passed TestData EUTRadiotype Frequency (GHz) Maximum output power #1 (dBm) Antenna gain #2 (dBi) Maximum EIRP #3 (dBm) Maximum tune-up EIRP #4 (dBm) Minimum distance #5 (mm) Exclusion Limit (dBm) Result MIMOWIFI2.4G2.4129.58211.581220032.03PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. #3:EIRP=Maximumoutputpower+Antennagain. #4:Thisvalueisdeclaredbytheapplicant. #5:Thisvalueisdeclaredbytheapplicant. ReportNo.: CISRR25101404002 Reporttemplateversion:CISE-TR-001-A0Page:5of6 5.2.Standalonetransmission Limit: Thecriterialistedinthefollowingtableshallbeusedtoevaluatetheenvironment impactofhumanexposuretoradiofrequency(RF)radiationasspecifiedin1.1307(b) LimitsforMaximumPermissibleExposure(MPE) Frequency range(MHz) Electricfield strength(V/m) Magneticfield strength (A/m) Powerdensity (mW/cm 2 ) Averaging time(minutes) (A)LimitsforOccupational/ControlledExposures 0.3–3.06141.63*(100)6 3.0–301842/f4.89/f *(900/f 2 ) 6 30–30061.40.1631.06 300–1500--f/3006 1500–100,000--56 (B)LimitsforGeneralPopulation/UncontrolledExposure 0.3–1.346141.63*(100)30 1.34–30824/f2.19/f *(180/f 2 ) 30 30–30027.50.0730.230 300–1500--f/150030 1500–100,000--1.030 Evaluationmethod: Pd=(Pout*G)/(4*pi*r 2 ) Where Pd=powerdensityinmW/cm 2 ,Pout=outputpowertoantennainmW, G=gainofantennainlinearscale,Pi=3.1416, R=distancebetweenobservationpointandcenteroftheradiatorincm Result:Passed TestData EUTRadiotype Maximum output power (dBm) #1 Maximum tune-up power (dBm) Antenna gain(dBi) #2 Minimun distance(cm) #3 Pd (mW/cm 2 ) Limit (mW/cm 2 ) Result MIMOWIFI2.4G9.58102.0020.000.00321.00PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. ReportNo.: CISRR25101404002 Reporttemplateversion:CISE-TR-001-A0Page:6of6 5.3.Simultaneoustransmission Limit: KDB447498D01v06,Clause4.3.2,47CFRPart1.1307 InthecaseofxedRFsourcesoperatinginthesametime-averagingperiod,orof multiplemobileorportableRFsourceswithinadeviceoperatinginthesametime averagingperiod,ifthesumofthefractionalcontributionstotheapplicablethresholds islessthanorequalto1asindicatedinthefollowingequation. Where a=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(B)ofthissectionforP,includingexistingexempttransmittersandthosebeing added. b=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(C)ofthissectionforThresholdERP,includingexistingexempttransmittersand thosebeingadded. c=numberofexistingfixed,mobile,orportableRFsourceswithknownevaluationforthespeci edminimumdistanceincludingexistingevaluatedtransmitters. P j =theavailablemaximumtime-averagedpowerortheERP,whicheverisgreater,forxed, mobile,orportableRFsourceiatadistancebetween0.5cmand40cm(inclusive). P th,j =theexemptionthresholdpower(P)accordingtoparagraph(b)(3)(i)(B)ofthissectionfor xed,mobile,orportableRFsourcei. ERP j =theERPoffixed,mobile,orportableRFsourcej. ERP th,j =exemptionthresholdERPforfixed,mobile,orportableRFsourcej,atadistanceofat leastλ/2πaccordingtotheapplicableformulaofparagraph(b)(3)(i)(C)ofthissection. Evaluated k =themaximumreportedSARorMPEoffixed,mobile,orportableRFsourcekeither inthedeviceoratthetransmittersitefromanexistingevaluationatthelocationofexposure. ExposureLimit k =eitherthegeneralpopulation/uncontrolledmaximumpermissibleexposure (MPE)orspecicabsorptionrate(SAR)limitforeachxed,mobile,orportableRFsourcek, asapplicablefrom§1.1310ofthischapter. Result:NotApplicable --------EndofReport--------

ReportNo.:CISRR25101404001 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of64 TESTREPORT ReportNo.CISRR25101404001 ProjectNo.CISR251014040 FCCID2BTKG-0085 ApplicantShenzhenMaijindeE-commerceCo.,Ltd Address 5C-221J,5/F,Bldg.210,TairanTechnologyParkNo.113Tairan4th Rd.,FutianDist.,Shenzhen,China ManufacturerShenzhenMaijindeE-commerceCo.,Ltd Address 5C-221J,5/F,Bldg.210,TairanTechnologyParkNo.113Tairan4th Rd.,FutianDist.,Shenzhen,China ProductNamesignalamplifier Trademark- Model/Typereference0085 ListedModel(s) 666,888,6660,8880,6688,6868,8686,8866,8899,9988,9898,8989, 0085,0165 Standard 47CFRPart15.247 DateofsamplereceiptNovember27,2025 TestdateNovember27,2025toDecember18,2025 IssuedateDecember18,2025 TestresultComplied Reviewedby:MorganTan Approvedby:HansHu ReportNo.:CISRR25101404001 Page 2 of 64 Contents 1.STANDARDANDAPPLICABLETESTMETHODS........................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.TESTDESCRIPTION.......................................................................................................................................4 4.SUMMARY........................................................................................................................................................5 4.1.ProductDescription*..................................................................................................................................5 4.2.RadioSpecificationDescription*..............................................................................................................5 4.3.ModificationofEUT.....................................................................................................................................5 4.4.Deviationfromstandards...........................................................................................................................6 4.5.TestingSite...................................................................................................................................................6 5.TESTCONFIGURATION.................................................................................................................................7 5.1.Testfrequencylist.......................................................................................................................................7 5.2.Descriptionsoftestmode...........................................................................................................................7 5.3.Supportunitusedintestconfiguration....................................................................................................7 5.4.Testsampleinformation.............................................................................................................................7 5.5.Environmentalconditions...........................................................................................................................7 5.6.Statementofthemeasurementuncertainty.............................................................................................8 5.7.EquipmentUsedduringtheTest................................................................................................................9 6.TESTRESULTS.............................................................................................................................................11 6.1.EvaluationResults(Evaluation)...............................................................................................................11 6.1.1.AntennaRequirement.............................................................................................................................11 6.2.RadioSpectrumMatterTestResults(RF)...............................................................................................12 6.2.1.ConductedEmissionatACpowerline.................................................................................................12 6.2.2.6dBBandwidth........................................................................................................................................15 6.2.3.MaximumConductedOutputPower.....................................................................................................16 6.2.4.PowerSpectralDensity..........................................................................................................................17 6.2.5.Conductedbandedgeandspuriousemission...................................................................................18 6.2.6.Radiatedbandedgeemission...............................................................................................................19 6.2.7.RadiatedSpuriousEmission(below1GHz).........................................................................................25 6.2.8.RadiatedSpuriousEmission(Above1GHz)........................................................................................29 7.APPENDIXREPORT......................................................................................................................................37 7.1.6dBBandwidth...........................................................................................................................................37 7.2.ConductedPeakOutputPower................................................................................................................41 7.3.PowerSpectralDensity.............................................................................................................................46 7.4.DutyCycle..................................................................................................................................................51 7.5.ConductedSpurious&BandEdgeEmission..…

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AntennaSheetData productpicture： Model WIFI Antenna Frequency Range2400-2500MHz VSWR< 2 Input Impedance50 Ω Gain2 dBi PolarizationVertical Polarization Radiation Pattern Omnidirectional Cable Type, Length/Material Input Connector RF1.13 Cable, Length 40 (Unit: mm, default) IPEX Gen 1 (U.FL/MHF1) Antenna DimensionΦ10×95mm (Diameter 10mm × Length 95mm) -20°C~80 Operating Temperature °C Manuacturer: Shenzhen Maijinde E-commerce Co., Ltd Address: C, th Floor, uilding , Tairan Technology Par, o Tairan th Road, Tianan Community, Shatou Street, Futian District, Shenzhen,China Standing wave diagram： rheogram： Return loss graph： 3D radiation pattern diagram XY-plane XZ-plane YZ-plane

ReportNo.:CISRR25101404001 Page 66 of 71 8.TESTSETUPPHOTOS ConductedEmissionatACpowerline Radiatedbandedgeemission RadiatedSpuriousEmission(Above1GHz) ReportNo.:CISRR25101404001 Page 67 of 71 RadiatedSpuriousEmission(below1GHz)