2A4K8-MX108Keyboard

C5266091_X24_Ed.2 1/1 “AttestationStatements” TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 TheCommissionadoptedrulesthatprohibitequipmentauthorizationfor“covered” telecommunicationsequipmentandvideosurveillanceequipmentproducedbyentitiesidentified ontheCommission’sCoveredList 1 ,whichisperiodicallyupdated.SeetheCoveredListformore details.ThisAttestationStatementistoconfirmthatwefollowtheSection2.911(d)(5)(i)-(ii) Applicant Companyname:ShenzhenYinchenTechnologyCo.,Ltd Granteecode:2A4K8 FCCID:2A4K8-MX108 ContactName: Address:STE101,201,301,401,Building1,1stIndustrialZone,BitouCommunity, SonggangStreet,Bao'anDistrict,Shenzhen,China TelephoneNo:0755-89216026 FaxNo:/ Email:[email protected] i.[ShenzhenYinchenTechnologyCo.,Ltd](“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtisnot“covered”equipment prohibitedfromreceivinganequipmentauthorizationpursuanttosection 2.903oftheFCCrules.Theapplicantmustsignthiscertification. ii.[ShenzhenYinchenTechnologyCo.,Ltd](“theapplicant”)certifiesthat,asofthe dateofthefilingoftheapplication,theapplicant[isnot](asaspecifically namedentityoranyofitssubsidiariesoraffiliates)identifiedontheCovered Listasanentityproducing“covered”equipment.Theapplicantmustsign thiscertification. [ShenzhenYinchenTechnologyCo.,Ltd](“theapplicant”)certifiesthat,asofthedateof thefilingofthe application,theapplicant[isnot]identifiedontheCoveredList asanentityproducing“covered” equipment. Date:2023-08-16 Applicant’sName:Yilin gFu Title:Manager Signature 1 TheCommission’sCoveredList ispublishedbythePublicSafetyandHomelandSecurityBureauandpostedonthe Commission’swebsite.ThisCoveredList,whichisperiodicallyupdated,identifiesparticularequipment,producedby particularentities,thatconstitutes“covered”equipment.https://www.fcc.gov/supplychain/coveredlist Yiling Fu

ShenzhenYinchenTechnologyCo.,Ltd DeclarationonModelDifferences We, ShenzhenYinchenTechnologyCo.,Ltd STE101,201,301,401,Building1,1stIndustrialZone,BitouCommunity,Songgang Street,Bao'anDistrict,Shenzhen,China Declarethatthefollowingproduct(s): FCCID:2A4K8-MX108 ProductName:Keyboard ModelNo.:MX108,MX104,MX98,MX87,MX84,MX82,MX68,MX61 Utilizetheidenticalcircuitdesign,PCBlayout,shieldingandinterfacewith(MX108),onlythe modelnumberdifferent.Thereforethisapplicationcanberegardedasidenticalin performancetothesubmittedtestsample. Themanufacturerwouldtakealltheresponsibilitiesfortheaboveproduct(s). Forandonbehalfof Authorizedperson Name:YilingFu Position:Manager Dateofissue:8/16/2023 *IherebydeclarethatIamentitledtosignonbehalfoftheapplicantandthattheinformationsuppliediscorrectandcomplete.

C5266091_X8_Ed.1 1/1 LetterofAuthorization ShenzhenYinchenTechnologyCo.,Ltd Company:ShenzhenYinchenTechnologyCo.,Ltd Address:STE101,201,301,401,Building1,1stIndustrialZone,Bitou Community,SonggangStreet,Bao'anDistrict,Shenzhen,China ProductName:Keyboard ModelNumber:MX108,MX104,MX98,MX87,MX84,MX82,MX68, MX61 FCCIdentifier:2A4K8-MX108 WeauthorizeLGAITechnologicalCenterS.A.,RondadelaFontdelCarme,s/n, 08193Bellaterra,Spain,toactonourbehalfonallmattersconcerningthe abovenamedequipment. AnyindividualwithinLGAITechnologicalCenterS.A.isauthorizedtoactonour behalfandtakeactionontheapplication. WedeclarethatauthorizeLGAITechnologicalCenterS.A.,RondadelaFontdel Carme,s/n,08193Bellaterra,Spain,isallowedtoforwardallinformation relatedtotheapprovalprojecttotheFederalCommunicationCommissionand todiscussanyissuesconcerningtheapprovalapplication.Anyandallacts carriedoutbyLGAITechnologicalCenterS.A.onourbehalfshallhavethe sameeffectasactsofourown. Name:YilingFuDate:2023-08-16 Title:Manager Signatureofapplicant:

C5266091_X10_Ed.2 1/1 ShenzhenYinchenTechnologyCo.,Ltd OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 Date:2023-08-16 Subject:RequestforConfidentiality FCCID:2A4K8-MX108 ToWhomItMayConcern, PursuanttotheprovisionsofSections0.457and0.459ofCommission'srules (47CFR0.457,0.459),wearerequestingtheCommissiontowithholdthefollowing attachment(s)asconfidentialdocumentfrompublicdisclosure. ExhibitsLong-Term Confidentiality Short-Term Confidentiality NOTE2 IDLabel/LocationNoNo AttestationStatementNoNo ExternalPhotosNo ☐ BlockDiagram ☒☐ Schematics ☒☐ TestReportNoNo TestSetupPhotosNo ☐ User’sManual ☐ NOTE 1 ☐ InternalPhotos ☐ NOTE 1 ☐ PartsList/TuneUp ☐☐ RFExposureInfoNoNo OperationalDescription ☒☐ CoverLetter(s)NoNo SDRSoftware/SecurityInfo ☐ No NOTE1:Long-TermConfidentialitymaybepermittedunderspecialconditions(SeeII.LONG-TERMCONFIDENTIALITY,Section3of KDB726920,uselastinforce) NOTE2:Short-TermConfidentialitycanberequestedforamaximumof180daysfromthedateofthegrant. Abovementioneddocumentcontainsdetailedsystemandequipmentdescriptionare consideredasproprietaryinformationinoperationoftheequipment.Thepublic disclosureofabovedocumentsmightbeharmfultoourcompanyandwouldgive competitoranunfairadvantageinthemarket. Incaseofshort-termConfidentiality,theapplicantrequeststheexhibitsselected abovearewithheldfrompublicviewforaperiodof____daysfromthedateof theGrantofEquipmentAuthorizationandpriortomarketing. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondentduringcertificationreviewprocesscannotbegrantedasconfidential documentsandthoseinformationwillbeavailableforpublicreviewoncethegrantof equipmentauthorizationisissued. C5266091_X10_Ed.2 1/1 Sincerely, Signature: Name:YilingFu Title:Manager

ProjectNo.:18220WC301409Page1of3 Code:AB-RF-05-b AppendixII--ExternalPhotograph ProjectNo.:18220WC301409Page2of3 Code:AB-RF-05-b ProjectNo.:18220WC301409Page3of3 Code:AB-RF-05-b

LabelLocationOnEUT Label

ProjectNo.:18220WC301409Page1of3 Code:AB-RF-05-b AppendixIII--InternalPhotograph ProjectNo.:18220WC301409Page2of3 Code:AB-RF-05-b ANT ProjectNo.:18220WC301409Page3of3 Code:AB-RF-05-b

AntennaSpecification Specifications Summary ITEMSPEC. ModelNameIBM2.4GHz CenterFrequency2402MHz-2.10dBi 2441MHz-1.78dBi 2480MHz-1.52dBi MAX.GAIN Polarization AzimuthBeamPattern Impedance AntennaLength Manufacture -1.52dBi Horizontal Omni-directional 50 Ω 11.5*6mm r JiangxiSuichuan TongmingTechnology Co.,Ltd AntennaPhoto&Length （ mm ） 1.Mainantenna:2402MHz 1.1Horizontal 1.2Vertical 2.Mainantenna:2441MHz 2.1Horizontal 2.2Vertica . 3.Mainantenna:2480MHz 3.1Horizontal 3.2Vertical 4.Result CenterFrequencyMaximumAntGain 2402MHzH-2.10dBi V-5.02dBi 2441MHzH-1.78dBi V-5.80dBi 2480MHzH-1.52dBi V-4.52dBi

ReportNo.:18220WC30140901FCCID:2A4K8-MX108Page1of30 Code:AB-RF-05-b FCCTestReport Applicant:ShenzhenYinchenTechnologyCo.,Ltd Address: STE101,201,301,401,Building1,1st IndustrialZone,BitouCommunity,Songgang Street,Bao'anDistrict,Shenzhen,China ProductName:Keyboard ReportDate:Aug.15,2023 ShenzhenAnbotekComplianceLaboratoryLimited ReportNo.:18220WC30140901FCCID:2A4K8-MX108Page2of30 Code:AB-RF-05-b Contents 1.GeneralInformation............................................................................................................................................6 1.1.ClientInformation....................................................................................................................................6 1.2.DescriptionofDevice(EUT)..................................................................................................................6 1.3.AuxiliaryEquipmentUsedDuringTest.................................................................................................7 1.4.DescriptionofTestConfiguration..........................................................................................................7 1.5.DescriptionOfTestSetup......................................................................................................................8 1.6.TestEquipmentList.................................................................................................................................9 1.7.MeasurementUncertainty....................................................................................................................10 1.8.DescriptionofTestFacility...................................................................................................................10 2.SummaryofTestResults.................................................................................................................................11 3.ConductedEmissionTest................................................................................................................................12 3.1.TestStandardandLimit........................................................................................................................12 3.2.TestSetup...............................................................................................................................................12 3.3.TestProcedure.......................................................................................................................................12 3.4.TestData.................................................................................................................................................12 4.RadiationSpuriousEmissionandBandEdge.............................................................................................15 4.1.TestStandardandLimit........................................................................................................................15 4.2.TestSetup...............................................................................................................................................15 4.3.TestProcedure.......................................................................................................................................16 4.4.TestData.................................................................................................................................................17 5.MaximumPeakOutputPowerTest...............................................................................................................25 5.1.TestStandardandLimit........................................................................................................................25 5.2.TestSetup...............................................................................................................................................25 5.3.TestProcedure.......................................................................................................................................25 5.4.TestData.................................................................................................................................................25 6.6dBOccupyBandwidthTest...........................................................................................................................26 6.1.TestStandardandLimit........................................................................................................................26 6.2.TestSetup...............................................................................................................................................26 6.3.TestProcedure.......................................................................................................................................26 6.4.TestData.................................................................................................................................................26 7.PowerSpectralDensityTest...........................................................................................................................27 7.1.TestStandardandLimit........................................................................................................................27 7.2.TestSetup...............................................................................................................................................27 7.3.TestProcedure.......................................................................................................................................27 7.4.TestData.................................................................................................................................................27 8.100kHzBandwidthofFrequencyBandEdgeRequirement......................................................................28 8.1.TestStandardandLimit........................................................................................................................28 8.2.Tes…

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Page1of23 AppendixTestData ReportNo.:18220WC30140901TestSampleNo.:1-2-2 StartTestDate:2023.07.10FinishTestDate:2023.07.17 TestEngineer:Auditor: Temperature:26.2 °C RelativeHumidity:48% Pressure:1012hPa AppendixA:DTSBandwidth TestResult TestModeAntennaFrequency[MHz] DTSBW [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict BLE_1MAnt1 24020.6722401.6442402.3160.5PASS 24400.6922439.6402440.3320.5PASS 24800.6882479.6442480.3320.5PASS Page2of23 TestGraphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 Page3of23 Page4of23 AppendixB:OccupiedChannelBandwidth TestResult TestModeAntennaFrequency[MHz] OCB[MHz] FL[MHz]FH[MHz] BLE_1MAnt1 24021.02982401.46102402.4908 24401.02792439.46392440.4918 24801.02662479.45982480.4864 Page5of23 TestGraphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 Page6of23 Page7of23 AppendixC:Maximumconductedoutputpower TestResultPeak TestModeAntennaFrequency[MHz] ConductedPeak Power[dBm] Conducted Limit[dBm] Verdict BLE_1MAnt1 24021.29≤30PASS 2440-0.01≤30PASS 2480-1.32≤30PASS Page8of23 TestGraphsPeak BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 Page9of23 Page10of23 AppendixD:Maximumpowerspectraldensity TestResult TestModeAntennaFrequency[MHz]Result[dBm/3kHz]Limit[dBm/3kHz]Verdict BLE_1MAnt1 2402-8.38≤8.00PASS 2440-9.36≤8.00PASS 2480-11.92≤8.00PASS Page11of23 TestGraphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 Page12of23 Page13of23 AppendixE:Bandedgemeasurements TestResult TestMod e Antenn a ChNam e Frequency[MHz ] RefLevel[dBm ] Result[dBm ] Limit[dBm ] Verdic t BLE_1MAnt1 Low24020.79-56.55≤-19.21PASS High2480-1.99-57.22≤-21.99PASS Page14of23 TestGraphs BLE_1M_Ant1_Low_2402 BLE_1M_Ant1_High_2480 Page15of23 AppendixF:ConductedSpuriousEmission TestResult TestMod e Antenn a Frequency[MHz ] FreqRange [MHz] RefLeve l [dBm] Result[dBm ] Limit[dBm ] Verdic t BLE_1MAnt1 2402 Reference-0.28-0.28---PASS 30~1000-0.28-68.86≤-20.28PASS 1000~2650 0 -0.28-43.98≤-20.28PASS 2440 Reference-1.93-1.93---PASS 30~1000-1.93-68.92≤-21.93PASS 1000~2650 0 -1.93-41.62≤-21.93PASS 2480 Reference-2.17-2.17---PASS 30~1000-2.17-68.63≤-22.17PASS 1000~2650 0 -2.17-40.54≤-22.17PASS Page16of23 TestGraphs BLE_1M_Ant1_2402_0~Reference BLE_1M_Ant1_2402_30~1000 BLE_1M_Ant1_2402_1000~26500 Page17of23 BLE_1M_Ant1_2440_0~Reference BLE_1M_Ant1_2440_30~1000 Page18of23 BLE_1M_Ant1_2440_1000~26500 BLE_1M_Ant1_2480_0~Reference Page19of23 BLE_1M_Ant1_2480_30~1000 BLE_1M_Ant1_2480_1000~26500 Page20of23 Page21of23 AppendixG:DutyCycle TestResult TestModeAntennaFrequency[MHz] ONTime [ms] Period [ms] DutyCycle [%] DutyCycle Factor[dB] BLE_1MAnt1 240219.0019.001000.00 244019.0019.001000.00 248019.0019.001000.00 Page22of23 TestGraphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 Page23of23 ---End---

ReportNo.:18220WC30140902FCCID:2A4K8-MX108Page1of30 Code:AB-RF-05-b FCCTestReport Applicant:ShenzhenYinchenTechnologyCo.,Ltd Address: STE101,201,301,401,Building1,1st IndustrialZone,BitouCommunity,Songgang Street,Bao'anDistrict,Shenzhen,China ProductName:Keyboard ReportDate:Aug.15,2023 ShenzhenAnbotekComplianceLaboratoryLimited ReportNo.:18220WC30140902FCCID:2A4K8-MX108Page2of30 Code:AB-RF-05-b Contents 1.GeneralInformation............................................................................................................................................6 1.1.ClientInformation.....................................................................................................................................6 1.2.DescriptionofDevice(EUT)..................................................................................................................6 1.3.AuxiliaryEquipmentUsedDuringTest.................................................................................................7 1.4.DescriptionofTestConfiguration..........................................................................................................7 1.5.DescriptionOfTestSetup.......................................................................................................................8 1.6.TestEquipmentList.................................................................................................................................9 1.7.MeasurementUncertainty....................................................................................................................10 1.8.DescriptionofTestFacility....................................................................................................................10 2.SummaryofTestResults.................................................................................................................................11 3.ConductedEmissionTest................................................................................................................................12 3.1.TestStandardandLimit........................................................................................................................12 3.2.TestSetup...............................................................................................................................................12 3.3.TestProcedure.......................................................................................................................................12 3.4.TestData.................................................................................................................................................12 4.RadiationSpuriousEmissionandBandEdge.............................................................................................15 4.1.TestStandardandLimit........................................................................................................................15 4.2.TestSetup...............................................................................................................................................15 4.3.TestProcedure.......................................................................................................................................16 4.4.TestData.................................................................................................................................................17 5.MaximumPeakOutputPowerTest................................................................................................................25 5.1.TestStandardandLimit........................................................................................................................25 5.2.TestSetup...............................................................................................................................................25 5.3.TestProcedure.......................................................................................................................................25 5.4.TestData.................................................................................................................................................25 6.6DBOccupyBandwidthTest...........................................................................................................................26 6.1.TestStandardandLimit........................................................................................................................26 6.2.TestSetup...............................................................................................................................................26 6.3.TestProcedure.......................................................................................................................................26 6.4.TestData.................................................................................................................................................26 7.PowerSpectralDensityTest...........................................................................................................................27 7.1.TestStandardandLimit........................................................................................................................27 7.2.TestSetup...............................................................................................................................................27 7.3.TestProcedure.......................................................................................................................................27 7.4.TestData.................................................................................................................................................27 8.100kHzBandwidthofFrequencyBandEdgeRequirement......................................................................28 8.1.TestStandardandLimit........................................................................................................................28 8.2…

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Page1of23 AppendixTestData ReportNo.:18220WC30140902TestSampleNo.:1-2-2 StartTestDate:2023.07.10FinishTestDate:2023.07.17 TestEngineer:Auditor: Temperature:26.2 °C RelativeHumidity:48% Pressure:1012hPa AppendixA:DTSBandwidth TestResult TestModeAntennaFrequency[MHz] DTSBW [MHz] FL[MHz]FH[MHz]Limit[MHz]Verdict 2.4GAnt1 24051.2402404.3722405.6120.5PASS 24401.3682439.2722440.6400.5PASS 24701.3082469.3402470.6480.5PASS Page2of23 TestGraphs 2.4G_Ant1_2405 2.4G_Ant1_2440 2.4G_Ant1_2470 Page3of23 Page4of23 AppendixB:OccupiedChannelBandwidth TestResult TestModeAntennaFrequency[MHz] OCB[MHz] FL[MHz]FH[MHz] 2.4GAnt1 24052.07442403.93382406.0082 24402.04602438.95222440.9982 24702.02612468.95862470.9847 Page5of23 TestGraphs 2.4G_Ant1_2405 2.4G_Ant1_2440 2.4G_Ant1_2470 Page6of23 Page7of23 AppendixC:Maximumconductedoutputpower TestResultPeak TestModeAntennaFrequency[MHz] ConductedPeak Power[dBm] Conducted Limit[dBm] Verdict 2.4GAnt1 24051.10≤30PASS 2440-0.02≤30PASS 2470-1.16≤30PASS Page8of23 TestGraphsPeak 2.4G_Ant1_2405 2.4G_Ant1_2440 2.4G_Ant1_2470 Page9of23 Page10of23 AppendixD:Maximumpowerspectraldensity TestResult TestModeAntennaFrequency[MHz]Result[dBm/3kHz]Limit[dBm/3kHz]Verdict 2.4GAnt1 2405-11.96≤8.00PASS 2440-12.67≤8.00PASS 2470-13.6≤8.00PASS Page11of23 TestGraphs 2.4G_Ant1_2405 2.4G_Ant1_2440 2.4G_Ant1_2470 Page12of23 Page13of23 AppendixE:Bandedgemeasurements TestResult TestMod e Antenn a ChNam e Frequency[MHz ] RefLevel[dBm ] Result[dBm ] Limit[dBm ] Verdic t 2.4GAnt1 Low2405-0.58-57.21≤-20.58PASS High2470-3.38-56.91≤-23.38PASS Page14of23 TestGraphs 2.4G_Ant1_Low_2405 2.4G_Ant1_High_2470 Page15of23 AppendixF:ConductedSpuriousEmission TestResult TestMod e Antenn a Frequency[MHz ] FreqRange [MHz] RefLeve l [dBm] Result[dBm ] Limit[dBm ] Verdic t 2.4GAnt1 2405 Reference-1.36-1.36---PASS 30~1000-1.36-68.26≤-21.36PASS 1000~2650 0 -1.36-44.33≤-21.36PASS 2440 Reference-2.85-2.85---PASS 30~1000-2.85-68.23≤-22.85PASS 1000~2650 0 -2.85-43.3≤-22.85PASS 2470 Reference-4.60-4.60---PASS 30~1000-4.60-68.53≤-24.6PASS 1000~2650 0 -4.60-42.58≤-24.6PASS Page16of23 TestGraphs 2.4G_Ant1_2405_0~Reference 2.4G_Ant1_2405_30~1000 2.4G_Ant1_2405_1000~26500 Page17of23 2.4G_Ant1_2440_0~Reference 2.4G_Ant1_2440_30~1000 Page18of23 2.4G_Ant1_2440_1000~26500 2.4G_Ant1_2470_0~Reference Page19of23 2.4G_Ant1_2470_30~1000 2.4G_Ant1_2470_1000~26500 Page20of23 Page21of23 AppendixG:DutyCycle TestResult TestModeAntennaFrequency[MHz] ONTime [ms] Period [ms] DutyCycle [%] DutyCycle Factor[dB] 2.4GAnt1 240519.0019.001000.00 244019.0019.001000.00 247019.0019.001000.00 Page22of23 TestGraphs 2.4G_Ant1_2405 2.4G_Ant1_2440 2.4G_Ant1_2470 Page23of23 ---End---