2BTIG-KH75Aluminum Alloy Hub Mechanical Keyboard Series

December 8,2025

DongguanEvoluxTechnologyCo.,Ltd Room1201,Building4,No.2R&DFifthRoad,SongshanLakeSciencePark,Dongguan, GuangdongProvince,China AttestationStatements NotCoveredEntityApplicant&NotCoveredEquipment To:FederalCommunicationsCommissionDate:Dec.8,25 7435OaklandMillsRoad, Columbia,MD21046,USA Ref:InformationRequiredbySection2.911(d)(5)(i)&(ii) FCCID:2BTIG-KH75 DongguanEvoluxTechnologyCo.,Ltd(“theapplicant”)certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredList,establishedpursuantto§1.50002of referencechapter,asanentityproducing“covered”communicationequipment.Theequipmentfor whichauthorizationissoughtisnot“covered”telecommunicationsequipmentandvideosurveillance equipmentproducedbyentitiesidentifiedontheCommission’sCoveredListthatprohibitedfrom receivinganequipmentauthorizationpursuanttosection§2.903oftheFCCrules. Sincerelyyours, ApplicantSignature PrintedName:PeiliangChen Title:Manager Address:Room1201,Building4,No.2R&DFifthRoad,SongshanLakeSciencePark,Dongguan, GuangdongProvince,China Tel.:+8613538618438 Email:[email protected]

DongguanEvoluxTechnologyCo.,Ltd Room1201,Building4,No.2R&DFifthRoad,SongshanLakeSciencePark,Dongguan, GuangdongProvince,China 1|Page AttestationStatements To:FederalCommunicationsCommissionDate:Dec.8,25 7435OaklandMillsRoad, Columbia,MD21046,USA Subject:AttestationofCompliancewithFCCCoveredListSoftwareRequirements FCCID:[2BTIG-KH75] ProductName:[AluminumAlloyHubMechanicalKeyboardSeries] 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:PeiliangChen Title:Manager Address:Room1201,Building4,No.2R&DFifthRoad,SongshanLakeSciencePark,Dongguan, GuangdongProvince,China Tel.:+8613538618438 Email:[email protected] DongguanEvoluxTechnologyCo.,Ltd Room1201,Building4,No.2R&DFifthRoad,SongshanLakeSciencePark,Dongguan, GuangdongProvince,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) ☐ EvaluationBasedonScanfor Softwareonthedevice ☐ EvaluationBasedonFilesystemscan ☐ EvaluationBasedonRunning softwarecheck

DongguanEvoluxTechnologyCo.,Ltd Room1201,Building4,No.2R&DFifthRoad,SongshanLakeSciencePark,Dongguan, GuangdongProvince,China Date:Dec.8,25 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:AgentAuthorizationforFCCID:2BTIG-KH75 I,theundersigned,herebyauthorize(FluxComplianceServiceLaboratory)toactonourbehalfinall mattersrelatingtothisapplicationforequipmentcertification. Anyactcarriedoutby(FluxComplianceServiceLaboratory)shallhavethesameeffectasourownandI acknowledgethatallresponsibilityforcomplyingwiththetermsandconditionsofcertification,as specifiedbyDERYCOMCERTIFICATIONSERVICES,INC.,stillresideswith(DongguanEvolux TechnologyCo.,Ltd). WecertifythatwearenotsubjecttoadenialoffederalbenefitsthatincludesFCCbenefitspursuantto Section5301oftheAnti-DrugAbuseActof1988,21U.S.C.§862,andthatnopartytotheapplication,as definedin47CFR§1.2002(b),issubjecttoadenialoffederalbenefitsthatincludesFCCbenefits pursuanttothatsection. Sincerely, ApplicantSignature: PrintedName:PeiliangChen Title:Manager Address:Room1201,Building4,No.2R&DFifthRoad,SongshanLakeSciencePark,Dongguan, GuangdongProvince,China Tel.:+8613538618438 Email:[email protected]

DongguanEvoluxTechnologyCo.,Ltd Room1201,Building4,No.2R&DFifthRoad,SongshanLakeSciencePark, Dongguan,GuangdongProvince,China ProductSimilarityDeclaration EUTDescription:AluminumAlloyHubMechanicalKeyboardSeries ModelNo.:KH75,KH98,KH108,FH75,FH98,FH108,WK75,WK98,WK108 FCCID:2BTIG-KH75 We(DongguanEvoluxTechnologyCo.,Ltd)herebystatethatall themodelsareelectricalidenticalincludingthesamesoftware parameterandhardwaredesign(i.e.,circuitdesign,PCBLayout, RFmodule/circuit,antennatype(s)andantennalocation, componentsonPCB,etc.,),samemechanicalstructureand design(includingproductenclosure,materials,etc.,),theonly differenceisthemodelnameandcolour. Signature: Name:PeiliangChen Title:Manager Place,date:December8,2025

DongguanEvoluxTechnologyCo., Ltd Room1201, Building4, No. 2 R&D Fifth Road , SongshanLake SciencePark, Dongguan, GuangdongProvince,China 12/8/2025 FederalCommunicationsCommission Authorizationand EvaluationDivision 7435 OaklandMills Road Columbia,MD 21046 Subject:ConfidentialityRequestfor:FCCID: 2BTIG-KH75 Pursuantto Sections0.457 and 0.459 of the Commission’s Rules,we herebyrequestpermanent confidentialtreatmentof the exhibitsaccompanyingthis certificationapplicationas outlinedbelow: Block Diagram  Schematics Operational Description The aboveexhibitscontaintrade secretsand/orproprietaryinformationthat are not publiclyavailableand materialsthat the Applicanthas spent considerableeffortsin developing.Publicdisclosureof these may be harmfulto the Applicantand give an unfair advantageto competitorson the market. Pursuantto DA 04-1705,the applicantalso requeststemporaryconfidentialtreatmentof the exhibits outlinedbelowfor a periodof (up to 180) days from the date of equipmentauthorizationand prior to marketingin the UnitedStatesto preventthe prematurereleaseof any sensitiveinformation.Applicantis awareof their responsibilityto notify DERYCOMin the event informationregardingthe productor the productis made availableto the publicbeforethe requestedperiodhas expired. User Manual InternalPhotos ExternalPhotos Test SetupPhotos Sincerely, (Signature) PrintedName:PeiliangChen Title: Manager Address:Room1201, Building4, No. 2 R&D Fifth Road,SongshanLake SciencePark, Dongguan, GuangdongProvince,China Tel.: +86 13538618438 Email: [email protected]

LabelandLabelLocation FCCID:2BTIG-KH75 L*W:10mm*5mm labelandWhitefont

FCS202508262 FCCRFExposure EUTDescription:AluminumAlloyHubMechanicalKeyboardSeries ModelNo.:KH75,KH98,KH108,FH75,FH98,FH108,WK75,WK98,WK108 FCCID:2BTIG-KH75 Equipmenttype:Portabledevices AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093 ， Unless specificallyrequiredbythepublishedRFexposureKDBprocedures,standalone1-gheadorbody and10-gextremitySARevaluationforgeneralpopulationexposureconditions,bymeasurementor numericasimulation,isnotrequiredwhenthecorrespondingSARTestExclusion Thresholocondition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances<50mm,the1-gand10-gSARtestexclusion thresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distancemm)]·[vfGHz)]<3.0for1-gSAR,ands7.5for10-gextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison 2.4G EIRP=EMeas+20log(dmeas)-104.7 EIRPistheequivalentisotropicallyradiatedpower, E M easindBmisthefieldstrengthoftheemissionatthemeasurementdistance,indBuV/m dMeasisthemeasurementdistance,inm Field strength(dBuV/m) EIRP(dBm)Maxtune- up(mW) Frequency(MHz)Min. distance(mm) Calc. thresholds limit 95.410.181.0423242050.32333.0 93.94-1.290.7430244250.23213.0 96.751.521.4191246550.44653.0 BLE conducted power (dBm) Maxtune- up(mW) Frequency(MHz)Min. distance(mm) Calc. thresholds limit 2.29 1.694324025 0.5252 3.0 2.35 1.717924405 0.5367 3.0 1.83 1.524124805 0.4800 3.0 Conclusion:NoSARisrequired

FCCTestReport ReportNo:FCS202508262W01 Issuedfor Applicant: DongguanEvoluxTechnologyCo.,Ltd Address: Room1201,Building4,No.2R&DFifthRoad,SongshanLake SciencePark,Dongguan,GuangdongProvince,China ProductName: AluminumAlloyHubMechanicalKeyboardSeries BrandName: N/A ModelName: KH75 SeriesModel: KH98,KH108,FH75,FH98,FH108,WK75,WK98,WK108 FCCID: 2BTIG-KH75 IssuedBy:FluxComplianceServiceLaboratory Add:Room105FloorBaohaoTechnologyBuilding1NO.15GongyeWestRoadHi-TechIndustrial, SongshanlakeDongguan Tel:0769-27280901Fax:0769-27280901http://www.FCS-lab.com Page 2 of41ReportNo.:FCS202508262W01 FluxComplianceServiceLaboratory Room105FloorBaohaoTechnologyBuilding1NO.15GongyeWestRoadHi-TechIndustrial,SongshanlakeDongguan Tel:0769-27280901Fax:0769-27280901http://www.FCS-lab.com TESTRESULTCERTIFICATION Applicant’sName......................:DongguanEvoluxTechnologyCo.,Ltd Address......................................: Room1201,Building4,No.2R&DFifthRoad,SongshanLake SciencePark,Dongguan,GuangdongProvince,China Manufacture'sName................:DongguanEvoluxTechnologyCo.,Ltd Address......................................: Room1201,Building4,No.2R&DFifthRoad,SongshanLake SciencePark,Dongguan,GuangdongProvince,China ProductDescription ProductName ........................... :AluminumAlloyHubMechanicalKeyboardSeries BrandName...............................:N/A ModelName..............................:KH75 SeriesModel .............................. :KH98,KH108,FH75,FH98,FH108,WK75,WK98,WK108 TestStandards .......................... :FCCRulesandRegulationsPart15SubpartC,Section247 TestProcedure..........................:ANSIC63.10:2020 ThisdevicedescribedabovehasbeentestedbyFluxComplianceServiceLaboratory,thetestresults showthattheequipmentundertest(EUT)isincompliancewiththeFCCrequirements.Anditis applicableonlytothetestedsampleidentifiedinthereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofFluxCompliance ServiceLaboratory,thisdocumentmaybealteredorrevisedbyFluxComplianceServiceLaboratory, personalonly,andshallbenotedintherevisionofthedocument.. DateofTest..................................: Date(s)ofperformanceoftests.:Aug.14,2025~Nov.19,2025 DateofIssue.................................:Dec.8,2025 TestResult ..................................... :Pass Testedby: (MikeTan) Reviewedby : (NelsWang) Approvedby: ( JackWang ) Page 3 of41ReportNo.:FCS202508262W01 FluxComplianceServiceLaboratory Room105FloorBaohaoTechnologyBuilding1NO.15GongyeWestRoadHi-TechIndustrial,SongshanlakeDongguan Tel:0769-27280901Fax:0769-27280901http://www.FCS-lab.com TableofContentsPage 1.SUMMARYOFTESTRESULTS..............................................................................................6 1.1TESTFACTORY................................................................................................................7 1.2MEASUREMENTUNCERTAINTY.....................................................................................7 2.GENERALINFORMATION.......................................................................................................8 2.1GENERALDESCRIPTIONOFTHEEUT..........................................................................8 2.2BLOCKDIGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED.............10 2.3DESCRIPTIONOFNECESSARYACCESSORIESANDSUPPORTUNITS.................11 2.4EQUIPMENTSLIST.........................................................................................................12 3.6DBBANDWIDTH..................................................................................................................13 3.1Limit..................................................................................................................................13 3.2TestProcedure.................................................................................................................13 3.3Testsetup.........................................................................................................................13 3.4Testresults.......................................................................................................................14 3.5OriginalTestData.............................................................................................................15 4.CONDUCTEDOUTPUTPOWER...........................................................................................18 4.1LIMIT................................................................................................................................18 4.2TESTPROCEDURE........................................................................................................18 4.3TESTSETUP...................................................................................................................18 4.4TESTRESULTS...............................................................................................................18 5.BANDEDGEANDSPURIOUS(CONDUCTED)....................................................................19 5.1LIMIT................................................................................................................................19 5.2TESTPROCEDURE........................................................................................................19 5.3TESTSETUP...................................................................................................................19 5.4TESTRESULTS...............................................................................................................20 5.5Originaltestdata..............................................................................................................20 6.POWERSPECTRALDENSITY..............................................................................................23 6.1LIMIT................................................................................................................................23 6.2TESTPROCEDURE.......................................................................…

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1 Antenna Specifications 1.Antenna Type: On-board Antenna Antenna manufacturer: Yanshan Xin Gao Electronic Technology Co., Ltd. 2. Real photos, drawings. 2 Frequency/MH 3. Antenna frequency,efficiency, gain. zEfficiency/%Gain/dBi 240041.51.4 241043.851.91 242043.951.9 243039.91.53 244043.451.95 245044.872.31 246042.562 247042.272.03 248040.551.72 249039.91.52 250039.991.37 4Antenna 2D/3D diagram Phi02D图Phi902D图 Theta902D图 2400 2450 2500 3 5.Antenna standing wave ratio 6.Antenna matching circuit 4 7．Test Environment 5 6