2A5PJ-TK51AKeyboard

- Don gg uan Dareu Electronics Audio Co., Ltd - Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 7/27/2023 U.S. A� nation Dongguan Dareu Electronics Audio Co., Ltd acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought ( FCC ID: 2A5PJ-TK51A ) : Name and company of U.S. agent: Linkwld LLC Physical U.S. address of agent: 1942 Broadway St. STE 314C, Boulder, CO, 80302, US FRN of U.S. agent: 0033625682 Email address of U.S. agent: [email protected] Linkwld LLC acknowledges their obligation to accept service of process on behalf of Dongguan Dareu Electronics Audio Co., Ltd. Dongguan Dareu Electronics Audio Co., Ltd with the FRN 0032100323 accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under§ 2.911 ( d )(7) . Sincerely, 沪 炟 艺A ”[ H,L) 二三 一 (} NI I 百 li300v - s `] [l:al [) Olll i- 8t Signature [Name) Bo Jiang [f itl e] R &D Manager [Company] Dongguan Dareu Electronics Audio Co., Ltd 飞 4 多 Signature (Name of U.S. agent] Timothy Zhu [Title of U.S. agent] Manager (Company of U.S. agent] Linkwld LLC 、 - 、 The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 DOI. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB

ProjectNo.:18220WC301262Page1of4 Code:AB-RF-05-b AppendixII--ExternalPhotograph ProjectNo.:18220WC301262Page2of4 Code:AB-RF-05-b ProjectNo.:18220WC301262Page3of4 Code:AB-RF-05-b ProjectNo.:18220WC301262Page4of4 Code:AB-RF-05-b

LabelLocationOnEUT Label ProductName:Keyboard ModelNo.:Z82 FCCID:2A5PJ-TK51A ThisdevicecomplieswithPart15oftheFCCRules.Operationis subjecttothefollowingtwoconditions: (1)Thisdevicemaynotcauseharmfulinterference,and (2) Thisdevicemustacceptanyinterferencereceived,including interferencethatmaycauseundesiredoperation.

ProjectNo.:18220WC301262Page1of5 Code:AB-RF-05-b AppendixIII--InternalPhotograph ProjectNo.:18220WC301262Page2of5 Code:AB-RF-05-b ProjectNo.:18220WC301262Page3of5 Code:AB-RF-05-b ANT ProjectNo.:18220WC301262Page4of5 Code:AB-RF-05-b ProjectNo.:18220WC301262Page5of5 Code:AB-RF-05-b

Page1of23 AppendixTestData ReportNo.:18220WC30126201TestSampleNo.:1-2-2 StartTestDate:2023.06.25FinishTestDate:2023.07.13 TestEngineer:Auditor: Temperature:26.1 °C RelativeHumidity:51% Pressure:1012hPa AppendixA:20dBEmissionBandwidth TestResult TestModeAntennaFrequency[MHz]20dbEBW[MHz]FL[MHz]FH[MHz] 2.4GAnt1 24041.0742403.4752404.549 24391.0652438.4902439.555 24791.3112478.2412479.552 Page2of23 TestGraphs 2.4G_Ant1_2404 2.4G_Ant1_2439 2.4G_Ant1_2479 Page3of23 Page4of23 AppendixB:OccupiedChannelBandwidth TestResult TestModeAntennaFrequency[MHz]OCB[MHz]FL[MHz]FH[MHz] 2.4GAnt1 24041.03902403.49052404.5295 24391.03852438.49162439.5301 24791.49252478.06182479.5543 Page5of23 TestGraphs 2.4G_Ant1_2404 2.4G_Ant1_2439 2.4G_Ant1_2479 Page6of23 Page7of23 AppendixC:Maximumconductedoutputpower TestResultPeak TestModeAntennaFrequency[MHz] ConductedPeak Power[dBm] Conducted Limit[dBm] Verdict 2.4GAnt1 2404-3.01≤20.97PASS 2439-3.51≤20.97PASS 2479-3.68≤20.97PASS Page8of23 TestGraphs 2.4G_Ant1_2404 2.4G_Ant1_2439 2.4G_Ant1_2479 Page9of23 Page10of23 AppendixD:Carrierfrequencyseparation TestResult TestModeAntennaFrequency[MHz]Result[MHz]Limit[MHz]Verdict 2.4GAnt1Hop2.000≥0.874PASS TestGraphs 2.4G_Ant1_Hop Page11of23 AppendixE:Timeofoccupancy TestResult TestModeAntennaFrequency[MHz] BurstWidth [ms] TotalHops [Num] Result[s]Limit[s]Verdict 2.4GAnt1Hop0.417360.015≤0.4PASS TestGraphs 2.4G_Ant1_Hop Page12of23 AppendixF:Numberofhoppingchannels TestResult TestModeAntennaFrequency[MHz]Result[Num]Limit[Num]Verdict 2.4GAnt1Hop16≥15PASS TestGraphs 2.4G_Ant1_Hop Page13of23 AppendixG:Bandedgemeasurements TestResult TestModeAntennaChNameFrequency[MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict 2.4GAnt1 Low2404-3.57-48.12≤-23.57PASS High2479-4.26-49.79≤-24.26PASS LowHop_2404-3.22-57.3≤-23.22PASS HighHop_2479-3.77-56.81≤-23.77PASS Page14of23 TestGraphs 2.4G_Ant1_Low_2404 2.4G_Ant1_High_2479 2.4G_Ant1_Low_Hop_2404 Page15of23 2.4G_Ant1_High_Hop_2479 Page16of23 AppendixH:ConductedSpuriousEmission TestResult TestModeAntennaFrequency[MHz] FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict 2.4GAnt1 2404 Reference-3.57-3.57---PASS 30~1000-3.57-57.06≤-23.57PASS 1000~26500-3.57-31.8≤-23.57PASS 2439 Reference-4.16-4.16---PASS 30~1000-4.16-57.35≤-24.16PASS 1000~26500-4.16-31.9≤-24.16PASS 2479 Reference-4.24-4.24---PASS 30~1000-4.24-50.97≤-24.24PASS 1000~26500-4.24-26.96≤-24.24PASS Page17of23 TestGraphs 2.4G_Ant1_2404_0~Reference 2.4G_Ant1_2404_30~1000 2.4G_Ant1_2404_1000~26500 Page18of23 2.4G_Ant1_2439_0~Reference 2.4G_Ant1_2439_30~1000 Page19of23 2.4G_Ant1_2439_1000~26500 2.4G_Ant1_2479_0~Reference 2.4G_Ant1_2479_30~1000 Page20of23 2.4G_Ant1_2479_1000~26500 Page21of23 AppendixI:DutyCycle TestResult TestModeAntennaFrequency[MHz] ONTime [ms] Period [ms] DutyCycle [%] DutyCycle Factor[dB] 2.4GAnt1 24040.422.7415.338.14 24390.422.7315.388.13 24790.422.7315.388.13 Page22of23 TestGraphs 2.4G_Ant1_2404 2.4G_Ant1_2439 2.4G_Ant1_2479 Page23of23 ---End---

ReportNo.:18220WC30126201FCCID:2A5PJ-TK51APage1of32 Code:AB-RF-05-b FCCTestReport Applicant:DongguanDareuElectronicsAudioCo.,LTD Address: Room301,Building3,No.3YuhuaRd., Juzhouarea,ShijieTown,Dongguan,China ProductName:Keyboard ReportDate:Aug.02,2023 ShenzhenAnbotekComplianceLaboratoryLimited ReportNo.:18220WC30126201FCCID:2A5PJ-TK51APage2of32 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 6.20dBOccupyBandwidthTest .........................................................................................................................26 6.1.TestStandard ..........................................................................................................................................26 6.2.TestSetup ...............................................................................................................................................26 6.3.TestProcedure .......................................................................................................................................26 6.4.TestData .................................................................................................................................................26 7.CarrierFrequencySeparationTest ................................................................................................................27 7.1.TestStandardandLimit ........................................................................................................................27 7.2.TestSetup ...............................................................................................................................................27 7.3.TestProcedure .......................................................................................................................................27 7.4.TestData .................................................................................................................................................27 8.NumberofHoppingChannelTest ..................................................................................................................28 8.1.TestStandardandLimit ................................................................................................…

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DongguanDareuElectronicsAudioCo.,LTD DeclarationconcerningAntennaSpecification Itisherebydeclaredthattheproduct ModelNo.:Z82,TK51AF FCCID:2A5PJ-TK51A fulfillstherequirementinFCCtestrelatingtotheantennatype. ThedevicespecifiedaboveconfirmstotheFCCrecommendationsforinternalantennatype(s) describedbelow: ModelNo.ofantenna:2.4GANT Typeofantenna:PCBAntenna Gainoftheantenna:-1.25dBi Frequencyrange:2403-2479MHz Themountingoftheantennaisfixedtotheradiomoduleandnootherantennashouldbeused. Companyname:DongguanDareuElectronicsAudioCo.,LTD Address:Room301,Building3,No.3YuhuaRd.,Juzhouarea,ShijieTown, Dongguan,China City:Dongguan ZIP/Postalcode:/ Country:China Place:Date:8/2/2023 Signature: version01

ANTENNASPECIFICATION Summary ITEMANTSPEC ModelName2.4GANT Center Frequency HorizontalVertical 2403MHz2441MHz2479MHz2403MHz2441MHz2479MHz -2.12-1.25-2.36-2.36-1.56-3.68 MAX.Gain-1.25 PolarizationHorizontalandVertical AzimuthBeam Pattern Omni-directional Impedance50Ohm AntennaLength14.90mm Manufacture DONGGUANSHUOCHUANGELECTRONICSCOLTD AntennaPhoto&Length(mm) Horizontal:2403MHz2441MHz2479MHz Power(dBm) Frequency (MHz) Gain(dB) MaxMinAvg 2403-2.12-25.43-12.36 2441-1.25-26.35-12.16 2479-2.36-26.33-15.25 Vertical:2403MHz2441MHz2479MHz Power(dBm) Frequency (MHz) Gain(dB) MaxMinAvg 2403-2.36-27.91-6.56 2441-1.56-25.32-7.72 2479-3.68-20.35-9.25

ProjectNo.:18220WC301262Page1of2 Code:AB-RF-05-b AppendixI--TestSetupPhotograph PhotoofConductedEmissionMeasurement PhotoofRadiationEmissionTest ProjectNo.:18220WC301262Page2of2 Code:AB-RF-05-b