2BAIXET-5AIRElectronic drum

U.S. Agent Designation for Service of Process - Certification Attestation Letter 12/22-2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID: 2BAIXET-5AIR Applicant FRN: 0033522863 Designated U.S. Agent Information: Company Name: Global Product Services and Consultation LLC FCC Registration Number (FRN): 0033406703 Physical U.S. Company Address: 328 W Palm Ave. Monrovia, CA91016 Contact Person: Michael Chan Cell Phone : 626-366-4358 Global Product Services and Consultation LLC accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service ofprocess for the above NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. certifies that, as of the date of t he filing of the application, Global Product Services and Consultation LLC is our designated U.S. agent for service of process for the above referenced FCC ID. NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. accepts to maintain an agent for noless than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. referenced FCC ID. Agent Email Address: [email protected] Sincerely, Title: Head Company: NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. Designated Agent: Global Product Services and Consultation LLC Company Representative: Li li Engineer Signature: Designated Agent Representative: Michael Chan Title: Technical Director Signature: Date : 01/05/2026 SC:6019620 NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD.

Rev 1/26/2023 (NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD.) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 12‐01‐2024 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BAIXET‐5AIR NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. certifies that the equipment for which authorization is sought does not include cybersecurity or anti‐virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti‐virus software pursuant to DA‐24‐ 886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end‐user or third parties cannot install additional software on this device. Sincerely, Lili / head engineer NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. Rev 1/26/2023 (NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD.) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 12‐01‐2024 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BAIXET‐5AIR NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, Lili / head engineer NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD.

(NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD.) Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: 2BAIXET-5AIR Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Block Diagram, Schematics, Operational Description Block Diagram .pdf, Schematics .pdf , Operation Description .pdf 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. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Pursuant to DA04-1705 June 15, 2004 of the Commission’s public notice, we also request temporary confidential treatment of information accompanying this application as outlined below: Short-term confidentiality requested: 180 days Exhibit Type File Name Internal Photos, Test Setup Photos, User Manual, External Photos Internal Photos .pdf, Test Setup Photos .pdf, User Manual .pdf, External Photos.pdf Sincerely, Lili / head engineer NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD.

Family models declaration letter Model list: ET‐5AIR, ET‐5PRO, ET‐5ULTRA, LUX‐11, LUX‐12, LUX‐16, LUX‐18, WAVY‐380, WAVY‐480, WAVY‐580, Lux‐12, LT‐22,LT‐66,LT‐77 All models are identical in circuitry and electrical, mechanical and physical construction, Only the model names are different. Lili / head engineer NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. No. 335, Jingu Middle Road, Yinzhou District, Ningbo, China

(NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD.) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Date: 12-01-2024 SUBJECT: FCC Application for FCC ID: 2BAIXET-5AIR To Whom It May Concern: We, the undersigned, hereby authorize Lisa Wang at EMTEK(SHENZHEN) CO., LTD. on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by EMTEK(SHENZHEN) CO., LTD. on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, Lili / head engineer NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD.

FCC STATEMENT : 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. Product name：Electronic drum Model：ET-5AIR FCC ID：2BAIXET-5AIR

FCC ID:2BAIXET-5AIR RF EXPOSURE EVALUATION Following FCC KDB 447498 D01 “General SAR test exclusion guidance” The corresponding SAR Exclusion Threshold condition, listed below:  The 1-g and 10-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, and ≤ 7.5 for 10-g extremity 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.  The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion.  At 100 MHz to 6 GHz and for test separation distances > 50 mm, the SAR test exclusion threshold is determined according to the following:  [Threshold at 50 mm in step 1) + (test separation distance - 50mm) ( f(MHz)/150)] mW, at 100MHz to 1500 MHz;  [Threshold at 50 mm in step 1) + (test separation distance - 50 mm)-10] mW at > 1500 MHz and ≤6 GHz;  At frequencies below 100 MHz, the following may be considered for SAR test exclusion.  The threshold at the corresponding test separation distance at 100 MHz in step 2) is multiplied by [1 + log(100/f(MHz))] for test separation distances > 50 mm and < 200 mm.  The threshold determined by the equation in a) for 50 mm and 100 MHz is multiplied by 1/2 for test separation distances ≤ 50 mm.  SAR measurement procedures are not established below 100 MHz. When SAR test exclusion cannot be applied, a KDB inquiry is required to determine SAR evaluation requirements for any test results to be acceptable. Mobile Device Evaluation Method and Limit Human exposure to RF emissions from mobile devices (47 CFR §2.1091) may be evaluated based on the MPE limits adopted by the FCC for electric and magnetic field strength and/or power density, as appropriate, since exposures are assumed to occur at distances of 20 cm or more from persons. Limits For General Population / Uncontrolled Exposure Frequency Range (MHz) E-field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Time |E| 2 , |H| 2 or S (Minutes) 0.3 -- 1.34 614 1.63 (100)* 30 1.34 -- 30 824/f 2.19/f (180/f 2 )* 30 30 -- 300 27.5 0.073 0.2 30 300 -- 1500 -- -- f/1500 30 1500 -- 100,000 -- -- 1.0 30 *Note: 1. f= Frequency in MHz * Plane-wave Equivalent Power Density 2. The averaging time for General Population/Uncontrolled exposure to fixed transmitters is not applicable for mobile and portable transmitters. See 47 CFR §§2.1091 and 2.1093 on source-based time-averaging requirement for mobile and portable transmitters. 11.1 Friis transmission formula: Pd= (Pout*G)\ (4*pi*R2) Where Pd= Power density in mW/cm 2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1416 R= distance between observation point and center of the radiator in cm Pd the limit of MPE, 1mW/cm 2 ,If we know the maximum gain of the nd total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. RF Exposure Information: The radiated output power of this device meets the limits of FCC/IC radio frequency exposure limits.This device should be operated with a minimum separation distance of 20cm (8 inches) between the equipment and a person's body. 11.2 Measurement Result Max RF Exposure evaluation. Mode Max Conducted Power (dBm) Max Conducted Power (mw) Antenna gain (dBi) Min.test separation distance （mm） √ f(GHz) Result Limits BT -0.03 1.0 1.67 5.0 2.4 0.3 3 Note: After assessment, it was determined that this equipment does not require SAR testing. ----- The End -----

ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page1of9 TestingReport CustomerName:NINGBOKINLINELECTRONICTECHNOLOGY CO.,LTD. ProductName:Electronicdrum SampleModel:DED-500/DED-500P/ACE-500/ACE-510/ACE-530 ReferenceStandard:GB/T9410-2008;ANSI/IEEEStd149-1979 IssueDate:2023.4.4 Engineer:Date: Auditor:Date: Approver:Date: ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page2of9 Version VersionNo.DateDescriptionFormulateApproval A02023.4.4Forthefirsttime,formulateJeacksonEason Contents 1.GeneralInformation.........................................................................................................................3 1.1Generalinformationoftestinginstitutions...........................................................................3 1.2Testingprinciple...................................................................................................................3 1.3Testequipment......................................................................................................................4 1.4Testenvironment...................................................................................................................4 1.5Statement..............................................................................................................................4 2.SampleInformation.........................................................................................................................5 2.1Clientinformation.................................................................................................................5 2.2DescriptionofEUT(S)..........................................................................................................5 2.3EUTappearance....................................................................................................................6 2.4EUTsetupphotooffreespaceOTAtesting.........................................................................6 3.TestResults......................................................................................................................................7 3.1Teststandard.........................................................................................................................7 3.2Testuncertainty.....................................................................................................................7 3.3Testdata................................................................................................................................7 3.3.1Typicalfreespaceefficiencyandgain......................................................................7 3.3.2Typicalfreespaceradiationpattern...........................................................................8 （Thefollowingisblank）................................................................................................................9 ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page3of9 1.GeneralInformation 1.1Generalinformationoftestinginstitutions Name ShenzhenRFI-LABCommunicationTechnologyCo.,Ltd. Address 10/FA,LingyunBld,LiufangRd,BaoanDistrict,SZ Tel 13682621346 E-mail [email protected] Equipment AlltheequipmentusedinthereportisfixedinZoneB,WestSideof1/F,Building1, TingweiIndustrialPark,No.6LiufangRoad,Bao'anDistrict,Shenzhen 1.2Testingprinciple ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page4of9 1.3Testequipment EquipmentModelNo.SerialNo.Manufacturer Calibration date Next calibration date OTATest System RayZone-5000 RFI-LAB-RF -D00 GTS2023.3.142025.3.13 Network Analyzer E5071C RFI-LAB-RF -D01 KEYSIGHT2022.5.132023.5.12 1.4Testenvironment Temperature 23.6°C Humidity 59%RH Pressure 100.13kPa 1.5Statement (1)Thetestresultsinthereportareonlyapplicabletothetestedsamplesandthetestedsamples workundertheenvironmentdescribedinthereport. (2)OnlyShenzhenRFI-LABCommunicationTechnologyCo.,Ltd.havetherighttomodifythe report,andthemodificationinformationshallbeannotatedintherevisionform. (3)Anyobjectiontothisreportshallberaisedwithin30daysafterformalconfirmationofthe report. (4)Thisreportisinvalidifthereisanyevidencethatthesampleinformationprovidedisfalsified. (5)Thereportisinvalidwithoutthesignatureoftheauditorandapprover. ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page5of9 2.SampleInformation 2.1Clientinformation Manufacturer NINGBOKINLINELECTRONICTECHNOLOGYCO.,LTD. Address Room602,MainBuilding,No.531NingheRoad,QiuaiTown, YinzhouDistrict,NingboCity,ZhejiangProvince Contacts / Tel / E-mail / Manufacturer NINGBOKINLINELECTRONICTECHNOLOGYCO.,LTD. 2.2DescriptionofEUT(S) ProductName Electronicdrum SampleModel DED-500/DED-500P/ACE-500/ACE-510/ACE-530 AntennaSize / SerialNo. / AntennaType PCBAntenna TestItem Antennagain;Efficiency;Radiationpattern FrequencyRange 2400-2500MHz ReceivedDate 2023.3.13 TestDate 2023.4.3 Remark / ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page6of9 2.3EUTappearance 2.4EUTsetupphotooffreespaceOTAtesting Planform Frontview ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page7of9 3.TestResults 3.1Teststandard NameParameterMethodStandardno. Mobile communication antenna Antennagain Genericspecification forantennasusedinthe mobilecommunications GB/T 9410-2008 Radiationpattern Antenna Radiationefficiency IEEEStandardTest ProceduresforAntennas ANSI/IEEEStd 149-1979 Gainanddirectivity 3.2Testuncertainty TheuncertaintywascalculatedonthebasisoftheGUMpublishedbyISO,usingthe inclusionfactorofK=2andthe95%confidenceleveltoexpresstheextended uncertainty. ItemUncertainty Antennagain±0.72dB Radiationefficiency±0.72dB 3.3 Testdata 3.3.1Typicalfreespaceefficiencyandgain Frequency/MHz 24002410242024302440245024602470248024902500 PeakGain/dBi 1.671.301.051.010.890.640.610.590.260.01-0.10 Efficiency/% 47.5344.3841.6641.1139.9237.9838.2538.3835.6733.6831.80 ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page8of9 3.3.2Typicalfreespaceradiationpattern (1)X-ZPlane(unit:dBi): (2)Y-ZPlane(unit:dBi): ReportNo.:RFI-LAB-RF-202303-CC17 QP030-E41 Page9of9 (3)X-YPlane(unit:dBi): (4)TypicalFreeSpace3DRadiationPatternat2.4GHz(unit:dBi): ---…

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Report No. ENS2411280200W02301R Page 1 of 67 Ver.1.0 TEST REPORT Product Name : Electronic drum Model Number : ET-5AIR, ET-5PRO, ET-5ULTRA, LUX-11, LUX-12, LUX-16, LUX-18, WAVY-380, WAVY-480, WAVY-580, Lux-12, LT-22,LT-66,LT-77 FCC ID : 2BAIXET-5AIR Prepared for : NINGBO KINLIN ELECTRONIC TECHNOLOGY CO., LTD. Address : No. 335, Jingu Middle Road, Yinzhou District, Ningbo, China Prepared by : EMTEK (SHENZHEN) CO., LTD. Address : Building 69, Majialong Industry Zone,Nanshan District, Shenzhen, Guangdong, China Tel: (0755) 26954280 Fax: (0755) 26954282 Report Number : ENS2411280200W02301R Date(s) of Tests : November 08, 2024 to December 24, 2024 Date of issue : January 05, 2026 $二维码$ Report No. ENS2411280200W02301R Page 2 of 67 Ver.1.0 Table of Contents 1 TEST RESULT CERTIFICATION .......................................................................................................................... 3 2 EUT TECHNICAL DESCRIPTION ......................................................................................................................... 5 3 SUMMARY OF TEST RESULT ............................................................................................................................. 6 4 TEST METHODOLOGY ........................................................................................................................................ 7 4.1 GENERAL DESCRIPTION OF APPLIED STANDARDS ............................................................................................... 7 4.2 MEASUREMENT EQUIPMENT USED ..................................................................................................................... 7 4.3 DESCRIPTION OF TEST MODES .......................................................................................................................... 8 5 FACILITIES AND ACCREDITATIONS ................................................................................................................... 9 5.1 FACILITIES ......................................................................................................................................................... 9 5.2 EQUIPMENT ....................................................................................................................................................... 9 5.3 LABORATORY ACCREDITATIONS AND LISTINGS .................................................................................................... 9 6 TEST SYSTEM UNCERTAINTY ......................................................................................................................... 10 7 SETUP OF EQUIPMENT UNDER TEST ............................................................................................................ 11 7.1 RADIO FREQUENCY TEST SETUP 1 ................................................................................................................... 11 7.2 RADIO FREQUENCY TEST SETUP 2 ................................................................................................................... 11 7.3 CONDUCTED EMISSION TEST SETUP ................................................................................................................ 13 7.4 Block Diagram Configuration Of Test System .............................................................................................. 14 7.5 SUPPORT EQUIPMENT ..................................................................................................................................... 14 8 FREQUENCY HOPPING SYSTEM REQUIREMENTS ...................................................................................... 1 5 8.1 Standard Applicable ...................................................................................................................................... 15 8.2 EUT Pseudorandom Frequency Hopping Sequence ................................................................................... 15 8.3 Equal Hopping Frequency Use ..................................................................................................................... 16 8.4 Frequency Hopping System ......................................................................................................................... 16 9 TEST REQUIREMENTS ..................................................................................................................................... 17 9.1 20DB&99%BANDWIDTH................................................................................................................................... 17 9.2 CARRIER FREQUENCY SEPARATION .................................................................................................................. 24 9.3 NUMBER OF HOPPING FREQUENCIES ............................................................................................................... 25 9.4 AVERAGE TIME OF OCCUPANCY (DWELL TIME) ................................................................................................. 31 9.5 MAXIMUM PEAK CONDUCTED OUTPUT POWER ................................................................................................. 33 9.6 CONDUCTED SUPRIOUS EMISSION ................................................................................................................... 36 9.7 RADIATED SPURIOUS EMISSION ....................................................................................................................... 47 9.8 CONDUCTED EMISSION TEST ........................................................................................................................... 62 9.9 ANTENNA APPLICATION .................................................................................................................................... 65 10 APPENDIX PHOTOGRAPHS OF EUT ............................................................................................................. 66 11 APPENDIX PHOTOGRAPHS OF TEST SETUP ...................................................…

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