2A76QKB051Dual Mode Keyboard

Shenzhen Ntmer Technology Co., Ltd. 2022.12.22 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Dual Mode Keyboard Trademark: N/A MODEL : KB051 FCC ID: 2A76QKB051 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Jack Dong / Certification Manager Contact information / address: 2109, Hivac Building, NO.2,Keji South 8th Road, High Tech Zone Community, Yuehai Subdistrict, Nanshan District, Shenzhen, China

Shenzhen Ntmer Technology Co., Ltd. 2022.12.22 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION EUT NAME: Dual Mode Keyboard Trademark: N/A MODEL : KB051 FCC ID: 2A76QKB051 To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing Co., Ltd to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title : Jack Dong / Certification Manager Contact information / address: 2109, Hivac Building, NO.2,Keji South 8th Road, High Tech Zone Community, Yuehai Subdistrict, Nanshan District, Shenzhen, China

External Photos

Size:40*20mm M/N: KB051 FCC ID: 2A76QKB051 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. Label location

Internal Photos Antenna

FCC ID: 2A76QKB051 RF exposure evaluation §2.1093 Radiofrequency radiation exposure evaluation: Portable Devices. According to§15.247(i) and§1.1307b(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the commission’s guidance. The 1-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR, where  f(GHz) is the RF channel transmit frequency in GHz  Power and distance are rounded to the nearest mW and mm before calculation  When the minimum test separation distance is < 5 mm, a distance of 5 mm according is applied to determine SAR test exclusion.  The result is rounded to one decimal place for comparison  GFSK Modulation Frequency (GHz) Max. Power (dBm) Tune up Power (dBm) Max. Tune up Power (dBm) Max. Tune up Power (mW) Test distance (mm) Result exclusion thresholds for 1-g SAR GFSK(1M) 2.402 2.85 2±1 3 2.0 5 0.62 3.0 Conclusion: For the max result : 0.62W/Kg ≤ FCC Limit 3.0 for 1g SAR. The Product unsupported at the same time to Transmitting.

NOTE:ThisdocumentisissuedbyShenzhenMorlabCommunicationsTechnologyCo.,Ltd.,thetestreportshallnotbereproducedexceptin fullwithoutpriorwrittenpermissionofthecompany.Thetestresultsapplyonlytotheparticularsample(s)testedandtothespecifictestscarried outwhichisavailableonrequestforvalidationandinformationconfirmedatourwebsite. MORLAB ShenzhenMorlabCommunicationsTechnologyCo.,Ltd.,FL1-3,BuildingA, FeiYangSciencePark,No.8LongChangRoad,Block67,BaoAnDistrict, ShenZhen,GuangDongProvince,P.R.China Tel:86-755-36698555Fax:86-755-36698525 Http://www.morlab.cnE-mail:[email protected] Page1of 15 REPORTNo.：SZ22120038E01 TESTREPORT APPLICANT:DongGuanMaeTayElectronicCo.,Ltd. PRODUCTNAME:DualModeKeyboard MODELNAME:KB051 TRADENAME:N/A BRANDNAME:N/A STANDARD(S):IEEEStd149-2021 RECEIPTDATE:2022-12-02 TESTDATE:2022-12-05 ISSUEDATE:2022-12-12 Editedby: FangJinshan(Rapporteur) Approvedby: ChiShide(Supervisor) MORLAB ShenzhenMorlabCommunicationsTechnologyCo.,Ltd.FL1-3,BuildingA, FeiYangSciencePark,No.8LongChangRoad,Block67,BaoAnDistrict, ShenZhen,GuangDongProvince,P.R.China Tel:86-755-36698555Fax:86-755-36698525 Http://www.morlab.cnE-mail:[email protected] Page2of15 REPORTNo.：SZ22120038E01 DIRECTORY 1.TechnicalInformation ........................................................................................................3 1.1.ApplicantandManufacturerInformation ....................................................................3 1.2.EquipmentUnderTest(EUT)Description...................................................................3 2.TestResults........................................................................................................................4 2.1.AppliedReferenceDocuments.....................................................................................4 2.2.TestConditions...............................................................................................................4 2.3.MeasurementUncertainty.............................................................................................4 2.4.TestResultslists.............................................................................................................5 AnnexATestSetupPhotos..................................................................................................6 AnnexBFigures .....................................................................................................................7 1.2DRadiationPattern .........................................................................................................7 2.3DRadiationPattern .........................................................................................................8 AnnexCEUTPhotos ...........................................................................................................10 AnnexDGeneralInformation .............................................................................................15 1.1IdentificationoftheResponsibleTestingLaboratory..............................................15 1.2IdentificationoftheResponsibleTestingLocation..................................................15 1.3TestEquipmentsUtilized..............................................................................................15 ChangeHistory VersionDateReasonforchange 1.02022-12-12Firstedition MORLAB ShenzhenMorlabCommunicationsTechnologyCo.,Ltd.FL1-3,BuildingA, FeiYangSciencePark,No.8LongChangRoad,Block67,BaoAnDistrict, ShenZhen,GuangDongProvince,P.R.China Tel:86-755-36698555Fax:86-755-36698525 Http://www.morlab.cnE-mail:[email protected] Page3of15 REPORTNo.：SZ22120038E01 1.TechnicalInformation Note:Providebymanufacturer. 1.1.ApplicantandManufacturerInformation Applicant: DongGuanMaeTayElectronicCo.,Ltd. ApplicantAddress: BeiHuanRoadIndustrialArea,ChangPingTown,DongguanCity, GuangdongProvince,P.R.C Manufacturer:N/A ManufacturerAddress:N/A 1.2.EquipmentUnderTest(EUT)Description WirelessTypeBluetooth Frequency2400MHz-2500MHz IMEIN/A SampleNo.2# MORLAB ShenzhenMorlabCommunicationsTechnologyCo.,Ltd.FL1-3,BuildingA, FeiYangSciencePark,No.8LongChangRoad,Block67,BaoAnDistrict, ShenZhen,GuangDongProvince,P.R.China Tel:86-755-36698555Fax:86-755-36698525 Http://www.morlab.cnE-mail:[email protected] Page4of15 REPORTNo.：SZ22120038E01 2.TestResults 2.1.AppliedReferenceDocuments Leadingreferencedocumentsfortesting: No.IdentityDocumentTitle 1 IEEEStd149-2021 IEEERecommendedPracticeforAntenna Measurements 2.2.TestConditions TestEnvironmentConditions ： RelativeHumidity:25...75% Temperature:+10°Cto+30°C 2.3.MeasurementUncertainty Theuncertaintyiscalculatedusingthemethodssuggestedinthe"GuidetotheExpressionof UncertaintyinMeasurement"(GUM)publishedbyISO.Whenthetestresultisacriticalvalue,we willusethemeasurementuncertaintygivethejudgmentresultbasedonthe95%Confidence intervals. ItemMeasurementUncertainty(dB) Gain±0.5 VSWR±0.2 MeasurementUncertainty(95%ConfidenceInterval)K=2 MORLAB ShenzhenMorlabCommunicationsTechnologyCo.,Ltd.FL1-3,BuildingA, FeiYangSciencePark,No.8LongChangRoad,Block67,BaoAnDistrict, ShenZhen,GuangDongProvince,P.R.China Tel:86-755-36698555Fax:86-755-36698525 Http://www.morlab.cnE-mail:[email protected] Page5of15 REPORTNo.：SZ22120038E01 2.4.TestResultslists 2.4.1.GainandEfficiency Frequency(MHz) Efficiency(%)Gain(dBi) 240015.21-3.53 241018.84-2.55 242021.56-2.01 243022.36-1.63 244023.40-1.33 245023.25-1.41 246021.96-1.65 247020.19-1.60 248018.08-1.94 249016.52-2.70 250015.40-3.54 MORLAB ShenzhenMorlabCommunicationsTechnologyCo.,Ltd.FL1-3,BuildingA, FeiYangSciencePark,No.8LongChangRoad,Block67,BaoAnDistrict, ShenZhen,GuangDongProvince,P.R.China Tel:86-755-36698555Fax:86-755-36698525 Http://www.morlab.cnE-mail:[email protected] Page6of15 REPORTNo.：SZ22120038E01 AnnexATestSetupPhotos MORLAB ShenzhenMorlabCommunicationsTechnologyCo.,Ltd.FL1-3,BuildingA, FeiYangSciencePark,No.8LongChangRoad,Block67,BaoAnDistrict, ShenZhen,GuangDongProvince,P.R.China Tel:86-755-36698555Fax:86-755-36698525 Http://www.morlab.cnE-mail:[email protected] Pa…

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No.：BCTC/RF-EMC-005 Page: 1 of 57 Edition：A.5 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2209539064E Applicant: Shenzhen Ntmer Technology Co., Ltd. Product Name: Dual Mode Keyboard Model/Type Ref.: KB051 Tested Date: 2022-09-10 to 2022-11-29 Issued Date: 2022-11-29 Report No.: BCTC2209539064E No.：BCTC/RF-EMC-005 Page: 2 of 57 Edition：A.5 FCC ID: 2A76QKB051 The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. Product Name: Dual Mode Keyboard Trademark: N/A Model/Type Ref.: KB051 Prepared For: Shenzhen Ntmer Technology Co., Ltd. Address: 2109, Hivac Building, NO.2,Keji South 8th Road, High Tech Zone Community, Yuehai Subdistrict, Nanshan District, Shenzhen, China Manufacturer: Shenzhen Ntmer Technology Co., Ltd. Address: 2109, Hivac Building, NO.2,Keji South 8th Road, High Tech Zone Community, Yuehai Subdistrict, Nanshan District, Shenzhen, China Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Zhancheng, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2022-09-30 Sample tested Date: 2022-09-10 to 2022-11-29 Issue Date: 2022-11-29 Report No.: BCTC2209539064E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is Bluetooth BLE radio test report. Tested by: Approved by: Brave Zeng/ Project Handler Zero Zhou/Reviewer Report No.: BCTC2209539064E No.：BCTC/RF-EMC-005 Page: 3 of 57 Edition：A.5 Table Of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 8 4.4 Channel List .......................................................................................................... 9 4.5 Test Mode ............................................................................................................. 9 4.6 Table Of Parameters Of Text Software Setting ................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test Procedure ................................................................................................... 13 6.4 EUT Operating Conditions .................................................................................. 13 6.5 Test Result .......................................................................................................... 14 7. Radiated Emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test Procedure ................................................................................................... 18 7.4 EUT Operating Conditions .................................................................................. 19 7.5 Test Result .......................................................................................................... 19 8. Radiated Band Emission Measurement And Restricted Bands Of Operation ..... 23 8.1 Block Diagram Of Test Setup .............................................................................. 23 8.2 Limit .................................................................................................................... 23 8.3 Test Procedure ................................................................................................... 24 8.4 EUT operating Conditions ................................................................................... 24 8.5 Test Result .......................................................................................................... 25 9. Power Spectral Density Test ............................................................................... 26 9.1 Block Diagram Of Test Setup .............................................................................. 26 9.2 Limit .................................................................................................................... 26 9.3 Test Procedure ................................................................................................... 26 9.4 EUT Operating Conditions .................................................................................. 26 9.5 Test Result ...................................…

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Report No.: BCTC2209539064E No.：BCTC/RF-EMC-005 Page: 55 of 57 Edition：A.5 16. EUT Test Setup Photographs Conducted emissions Photo Radiated Measurement Photos Report No.: BCTC2209539064E No.：BCTC/RF-EMC-005 Page: 56 of 57 Edition：A.5