2BRNE-AT-600Professional processor

InternalPhotos M/N:AT-600 InternalPhotos M/N:AT-600 InternalPhotos M/N:AT-600 InternalPhotos M/N:AT-600

ConductedTest RadiatedTest(Below1GHz) RadiatedTest(Above1GHz) RadioSpectrumTesting

Page 41 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2480-30~26500-PASS 3DH5-Ant1-2402-30~26500-PASS Page 42 of 49 Report No. ESTE-R2509047 3DH5-Ant1-2441-30~26500-PASS 3DH5-Ant1-2480-30~26500-PASS Page 43 of 49 Report No. ESTE-R2509047 Page 44 of 49 Report No. ESTE-R2509047 Appendix H: Reference level measurement Test Result TestMode Antenna Freq(MHz) Max.Point[MHz] Result[dBm] DH5 Ant1 2402 2402.07 2.07 DH5 Ant1 2441 2441.08 2.05 DH5 Ant1 2480 2479.96 0.68 2DH5 Ant1 2402 2401.76 2.97 2DH5 Ant1 2441 2440.75 2.72 2DH5 Ant1 2480 2479.77 1.40 3DH5 Ant1 2402 2401.74 2.92 3DH5 Ant1 2441 2440.75 3.05 3DH5 Ant1 2480 2479.73 1.70 Page 45 of 49 Report No. ESTE-R2509047 Test Graphs DH5-Ant1-2402-PASS DH5-Ant1-2441-PASS DH5-Ant1-2480-PASS Page 46 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2402-PASS 2DH5-Ant1-2441-PASS Page 47 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2480-PASS 3DH5-Ant1-2402-PASS Page 48 of 49 Report No. ESTE-R2509047 3DH5-Ant1-2441-PASS 3DH5-Ant1-2480-PASS Page 49 of 49 Report No. ESTE-R2509047

Page 1 of 49 Report No. ESTE-R2509047 Appendix A: 20dB Emission Bandwidth Test Result TestMode Antenna Frequency[MHz] 20db EBW[MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict DH5 Ant1 2402 0.933 2401.463 2402.396 --- --- DH5 Ant1 2441 0.936 2440.460 2441.396 --- --- DH5 Ant1 2480 0.939 2479.457 2480.396 --- --- 2DH5 Ant1 2402 1.260 2401.292 2402.552 --- --- 2DH5 Ant1 2441 1.263 2440.289 2441.552 --- --- 2DH5 Ant1 2480 1.272 2479.286 2480.558 --- --- 3DH5 Ant1 2402 1.299 2401.268 2402.567 --- --- 3DH5 Ant1 2441 1.278 2440.274 2441.552 --- --- 3DH5 Ant1 2480 1.248 2479.280 2480.528 --- --- Page 2 of 49 Report No. ESTE-R2509047 Test Graphs DH5-Ant1-2402 DH5-Ant1-2441 DH5-Ant1-2480 Page 3 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2402 2DH5-Ant1-2441 Page 4 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2480 3DH5-Ant1-2402 Page 5 of 49 Report No. ESTE-R2509047 3DH5-Ant1-2441 3DH5-Ant1-2480 Page 6 of 49 Report No. ESTE-R2509047 Page 7 of 49 Report No. ESTE-R2509047 Appendix B: Maximum conducted output power Test Result Peak Test Mode Antenna Frequency[MHz] Conducted Peak Powert[dBm] Conducted Limit[dBm] Verdict DH5 Ant1 2402 2.93 ≤20.97 PASS DH5 Ant1 2441 2.78 ≤20.97 PASS DH5 Ant1 2480 1.71 ≤20.97 PASS 2DH5 Ant1 2402 3.50 ≤20.97 PASS 2DH5 Ant1 2441 3.40 ≤20.97 PASS 2DH5 Ant1 2480 2.39 ≤20.97 PASS 3DH5 Ant1 2402 3.65 ≤20.97 PASS 3DH5 Ant1 2441 3.55 ≤20.97 PASS 3DH5 Ant1 2480 2.45 ≤20.97 PASS Test Graphs DH5-Ant1-2402-PASS DH5-Ant1-2441-PASS Page 8 of 49 Report No. ESTE-R2509047 DH5-Ant1-2480-PASS 2DH5-Ant1-2402-PASS Page 9 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2441-PASS 2DH5-Ant1-2480-PASS Page 10 of 49 Report No. ESTE-R2509047 3DH5-Ant1-2402-PASS 3DH5-Ant1-2441-PASS Page 11 of 49 Report No. ESTE-R2509047 3DH5-Ant1-2480-PASS Page 12 of 49 Report No. ESTE-R2509047 Appendix C: Carrier frequency separation Test Result TestMode Antenna Frequency[MHz] Result[MHz] Limit[MHz] Verdict DH5 Ant1 2402 0.978 ≥0.939 PASS DH5 Ant1 2441 0.984 ≥0.939 PASS DH5 Ant1 2480 1.128 ≥0.939 PASS 2DH5 Ant1 2402 1.026 ≥0.848 PASS 2DH5 Ant1 2441 0.996 ≥0.848 PASS 2DH5 Ant1 2480 1.002 ≥0.848 PASS 3DH5 Ant1 2402 1.182 ≥0.866 PASS 3DH5 Ant1 2441 1.029 ≥0.866 PASS 3DH5 Ant1 2480 0.894 ≥0.866 PASS Page 13 of 49 Report No. ESTE-R2509047 Test Graphs DH5-Ant1-2402-PASS DH5-Ant1-2441-PASS DH5-Ant1-2480-PASS Page 14 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2402-PASS 2DH5-Ant1-2441-PASS Page 15 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2480-PASS 3DH5-Ant1-2402-PASS Page 16 of 49 Report No. ESTE-R2509047 3DH5-Ant1-2441-PASS 3DH5-Ant1-2480-PASS Page 17 of 49 Report No. ESTE-R2509047 Page 18 of 49 Report No. ESTE-R2509047 Appendix D: Time of occupancy Test Result TestMode Antenna Frequency[MHz] BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH1 Ant1 Hop 0.367 319 0.117 ≤0.4 PASS DH3 Ant1 Hop 1.600 159 0.254 ≤0.4 PASS DH5 Ant1 Hop 2.850 107 0.305 ≤0.4 PASS 2DH1 Ant1 Hop 0.377 319 0.12 ≤0.4 PASS 2DH3 Ant1 Hop 1.620 159 0.258 ≤0.4 PASS 2DH5 Ant1 Hop 2.860 107 0.306 ≤0.4 PASS 3DH1 Ant1 Hop 0.377 319 0.12 ≤0.4 PASS 3DH3 Ant1 Hop 1.610 159 0.256 ≤0.4 PASS 3DH5 Ant1 Hop 2.860 107 0.306 ≤0.4 PASS Page 19 of 49 Report No. ESTE-R2509047 Test Graphs DH1-Ant1-Hop-PASS DH3-Ant1-Hop-PASS Page 20 of 49 Report No. ESTE-R2509047 DH5-Ant1-Hop-PASS Page 21 of 49 Report No. ESTE-R2509047 2DH1-Ant1-Hop-PASS Page 22 of 49 Report No. ESTE-R2509047 2DH3-Ant1-Hop-PASS Page 23 of 49 Report No. ESTE-R2509047 2DH5-Ant1-Hop-PASS Page 24 of 49 Report No. ESTE-R2509047 3DH1-Ant1-Hop-PASS Page 25 of 49 Report No. ESTE-R2509047 3DH3-Ant1-Hop-PASS Page 26 of 49 Report No. ESTE-R2509047 3DH5-Ant1-Hop-PASS Page 27 of 49 Report No. ESTE-R2509047 Page 28 of 49 Report No. ESTE-R2509047 Appendix E: Number of hopping channels Test Result TestMode Antenna Frequency[MHz] Result[Num] Limit[Num] Verdict DH5 Ant1 Hop 79 ≥15 PASS 2DH5 Ant1 Hop 79 ≥15 PASS 3DH5 Ant1 Hop 79 ≥15 PASS Page 29 of 49 Report No. ESTE-R2509047 Test Graphs DH5-Ant1-Hop-PASS 2DH5-Ant1-Hop-PASS 3DH5-Ant1-Hop-PASS Page 30 of 49 Report No. ESTE-R2509047 Page 31 of 49 Report No. ESTE-R2509047 Appendix F: Band edge measurements Test Result TestMode Antenna ChName Frequency[MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 Low 2402 2.07 -48.54 ≤-17.93 PASS DH5 Ant1 High 2480 0.68 -49.6 ≤-19.32 PASS DH5 Ant1 Low Hop_2402 4.07 -46.49 ≤-15.94 PASS DH5 Ant1 High Hop_2480 3.14 -48.06 ≤-16.86 PASS 2DH5 Ant1 Low 2402 2.97 -48.92 ≤-17.03 PASS 2DH5 Ant1 High 2480 1.40 -49.56 ≤-18.6 PASS 2DH5 Ant1 Low Hop_2402 -1.94 -48.87 ≤-21.94 PASS 2DH5 Ant1 High Hop_2480 -3.11 -48.84 ≤-23.11 PASS 3DH5 Ant1 Low 2402 2.92 -49.4 ≤-17.08 PASS 3DH5 Ant1 High 2480 1.70 -49.3 ≤-18.3 PASS 3DH5 Ant1 Low Hop_2402 -1.17 -48.54 ≤-21.17 PASS 3DH5 Ant1 High Hop_2480 -2.70 -48.61 ≤-22.7 PASS Page 32 of 49 Report No. ESTE-R2509047 Test Graphs DH5-Ant1-2402-PASS DH5-Ant1-2480-PASS DH5-Ant1-Hop_2402-PASS Page 33 of 49 Report No. ESTE-R2509047 DH5-Ant1-Hop_2480-PASS 2DH5-Ant1-2402-PASS Page 34 of 49 Report No. ESTE-R2509047 2DH5-Ant1-2480-PASS 2DH5-Ant1-Hop_2402-PASS Page 35 of 49 Report No. ESTE-R2509047 2DH5-Ant1-Hop_2480-PASS 3DH5-Ant1-2402-PASS Page 36 of 49 Report No. ESTE-R2509047 3DH5-Ant1-2480-PASS 3DH5-Ant1-Hop_2402-PASS Page 37 of 49 Report No. ESTE-R2509047 3DH5-Ant1-Hop_2480-PASS Page 38 of 49 Report No. ESTE-R2509047 Appendix G: Conducted Spurious Emission Test Result TestMode Antenna Frequency[MHz] FreqRange [MHz] RefLevel [dBm] Result [dBm] Limit [dBm] Verdict DH5 Ant1 2402 30~26500 2.07 -41.39 ≤-17.93 PASS DH5 Ant1 2441 30~26500 2.05 -41.86 ≤-17.95 PASS DH5 Ant1 2480 30~26500 0.68 -41.15 ≤-19.32 PASS 2DH5 Ant1 2402 30~26500 2.97 -42.37 ≤-17.03 PASS 2DH5 Ant1 2441 30~26500 2.72 -41.88 ≤-17.28 PASS 2DH5 Ant1 2480 30~26500 1.40 -41.9 ≤-18.6 PASS 3DH5 Ant1 2402 30~26500 2.92 -42.04 ≤-17.08 PASS 3DH5 Ant1 2441 30~26500 3.05 -41.53 ≤-16.95 PASS 3DH5 Ant1 2480 30~26500 1.70 -40.29 ≤-18.3 PASS Page 39 of 49 Report No. ESTE-R2509047 Test Graphs DH5-Ant1-2402-30~26500-PASS DH5-Ant1-2441-30~26500-PASS DH5-Ant1-2480-30~26500-PASS Page 40 o…

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Page 1 of 55 Report No. ESTE-R2509047 FCC PART 15C TEST REPORT FOR CERTIFICATION On Behalf of Guangzhou ToneWinner Electronics CO.,Ltd Professional processor Model Number: AT-600 Additional Model: AT-600PRO, AT-600PRO+, AD-7600HD, AD-7600HDII FCC ID: 2BRNE-AT-600 Applicant: Guangzhou ToneWinner Electronics CO.,Ltd Address: Building 2, No.1, Hongsheng 3 Road, Dashi, Panyu, Guangzhou 511430, China Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2509047 Date of Test: Aug. 11, 2025~ Nov. 12, 2025 Date of Report: Nov. 17, 2025 Page 2 of 55 Report No. ESTE-R2509047 TABLE OF CONTENTS Description Page TEST REPORT VERIFICATION .......................................................................................................... 3 1. GENERAL INFORMATION ................................................................................................................... 5 1.1. Description of Device (EUT) ............................................................................................................ 5 1.2. Antenna Information ......................................................................................................................... 5 1.3. Information of RF Cable ................................................................................................................... 5 2. SUMMARY OF TEST ........................................................................................................................... 6 2.1. Summary of test result ..................................................................................................................... 6 2.2. Test Facilities ..................................................................................................................................... 7 2.3. Measurement uncertainty ................................................................................................................ 8 2.4. Assistant equipment used for test .................................................................................................. 8 2.5. Block Diagram ................................................................................................................................... 8 2.6. Test mode .......................................................................................................................................... 9 2.7. Channel List ..................................................................................................................................... 10 2.8. Power Setting of Test Software .................................................................................................... 10 2.9. Test Equipment ............................................................................................................................... 11 3. MAXIMUM PEAK OUTPUT POWER ................................................................................................... 13 3.1. Limit ................................................................................................................................................... 13 3.2. Test Setup ........................................................................................................................................ 13 3.3. Spectrum Analyzer Setting ............................................................................................................ 13 3.4. Test Procedure ................................................................................................................................ 13 3.5. Test Result ....................................................................................................................................... 13 4. 20 DB BANDWIDTH ......................................................................................................................... 14 4.1. Limit ................................................................................................................................................... 14 4.2. Test Setup ........................................................................................................................................ 14 4.3. Spectrum Analyzer Setting ............................................................................................................ 14 4.4. Test Procedure ................................................................................................................................ 14 4.5. Test Result ....................................................................................................................................... 14 5. CARRIER FREQUENCY SEPARATION .............................................................................................. 15 5.1. Limit ................................................................................................................................................... 15 5.2. Test Setup ........................................................................................................................................ 15 5.3. Spectrum Analyzer Setting ............................................................................................................ 15 5.4. Test Procedure ................................................................................................................................ 15 5.5. Test Result ....................................................................................................................................... 15 6. NUMBER OF HOPPING CHANNEL ................................................................................................... 16 6.1. Limit ................................................................................................................................................... 16 6.2. Test Setup ....................................................................…

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Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 1 ProductAcknowledgment Cover/SignaturePage CustomerName： CustomerPartNumber： KexinPartNumber：NZ2017 SpecificationDescription：2.4GFPC38x16.1-RG1.13（grey）-40CM-IPEX ProductionDate：2025年08月19日 FactoryDeliveryConfirmation： DepartmentReviewApproval RadioFrequency Department ZhouLee StructuralDepartment LeeLee QualityDepartment LiuFeiWang CustomerConfirmation： CheckReviewApproval Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 2 TextControlRecord △RecordofDocumentFormulation,RevisionandAbolition DocumentNameDateControlRevisionRelatedContentFormulateApproval SampleApprovalForm 2025.08.19V1 Firstproduction EileenLee Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 3 TableofContents 1．Cover/SignaturePage......................................................1 2．TextControlRecord...............................................................2 3．TableofContents.....................................................................3 4．ProductPerformanceParameters..........................................4 5．Productdimensiondrawing......................................................5 6．ElectricalPerformanceTestReport.............................................6-7 7．Actualproductpictures............................................................8 8．Environmentaltest.....................................................................8-10 Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 4 ProductPerformanceParameters ElectricalSpecifications FrequencyRange(MHz) 2400-2500MHz InputImpendence(Ω)50 V.S.W.R ≤ 4(Nomatchingequipment,for referenceonly) Gain(dbi)0 ± 1(Nomatchingequipment,for referenceonly) PolarizationType linear RadiationDirectionOmni-Directional ContinuityTestchannel MechanicalSpecifications Antennasize(mm)38*16.1mm ConnectTypeIPEX RadomeMaterial FPC RadomeColorBlack OperatingTemp-30~+65 ̊C Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 5 Productdimensiondrawing Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 6 ElectricalPerformanceTestReport：VSWR Efficiency&Gain FreqEffiGain (MHz)(%)(dBi) 240011.64-1.10 245010.71-1.92 250019.11-0.02 Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 7 3D&2DPattern Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 8 Actualproductpictures EnvironmentalTestReport 8.1Highandlowtemperaturehumiditytest TestName NZ2017 ProductNameandSpecification 2.4GFPC TestItemHightemperature,lowtemperatureandconstanthumiditytests RequirementConstanttemperatureandhumidity testchamber Numberoftests 1PCS TestMethod1.Themetalsurfacecoatingshallbefreefromdefectssuchaspeeling,crackingand wrinkling;non-metallicpartsshallnothavephenomenasuchasdiscoloration,cracking, deformationanddegumming. ResultDeterminationTestItemsRequirementsTestMethodResultDetermination High-temperature Test Temperature(°C) Testsample temperaturetime(h) Testduration(h) Recoverytime(h) 65±3 1 2 1 Teststeps: a)Putthetestedpiece intothetestchamber, thenadjustthe temperatureofthe high-temperature chamberto65°C±3°C, Qualified Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 9 andmonitorthetime. b)Afterthetest,place itatroomtemperature for1hourandconduct routineinspection. Low-temperature Test Temperature（°C） TimeforTest SampletoReach Temperature（h） TestDuration（h） RecoveryTime（h） -30±3 1 2 1 Testprocedures: a)Putthetestedpiece intothetestchamber, thenadjustthe temperatureofthe high-temperature chamberto75°C±3°C, andmonitorthetime. b)Afterthetest,place itatroomtemperature for1hourandconduct routineinspection. Qualified Constantdampheat test Temperature（°C） RelativeHumidity(%) TestDuration(h) RecoveryTime(h) +40±3 90-95 21 1 a)Putthetestedpiece intothetestchamber, thenadjustthe temperatureofthetest chamberto+40°C±3°C andthehumidityto 90-95%,andmonitor thetime. b)Afterthetest,placeit atroomtemperaturefor 1hourandconduct routineinspection. Qualified Inspector:LiuChunyuReview:WangFei Address:BuildingH,HongyongliIndustrialZone, Shabeiwa,BaolongStreet,LonggangDistrict,Shenzhen TEL:0755-28700870FAX：0755-28483275 Website:www.kxwxjs.com 10 8.2Saltspraytest PartNumber NZ2017 ProductNameandSpecification 2.4GFPC TestItemsSaltspraytest TestingequipmentSaltspraytestingmachineNumberoftests1PCS Inspection Standard 1.Themetalsurfacecoatingshallnotpeeloff;thereshallbenodefectssuchasrust, corrosion,oxidation,etc.ontheappearance. TestNameTestItemsRequirementsTestMethodResult Judgment Saltspraytest1.NaClconcentrat ion: 2.Airpressure: 3.PHvalue: 4.Sprayvolume: 5.Brinetest temperature setting a.Laboratory temperature: b.Pressure barrel temperature: 6.Testtime: 40-60g/1kg 1.0±0.01kgf㎡ 6.5-7.2 1.0-2.0ml/80c/h 35±1°C 47±1°C 12H Teststeps: a)Adjustthesaltspray testingmachinetothe relevanttestconditions. b)Putthetestedpiece intothesaltspraytesting machineandleaveitfor 12hours.Afterthetest, rinseitwithcleanwater, visuallyinspectthe appearanceofthetested piece,andconduct routineinspection. Qualified Inspector:LiuChunyuReview:WangFei

Page 1 of 5 Report No. ESTE-R2509050 FCC 47 CFR MPE REPORT Guangzhou ToneWinner Electronics CO.,Ltd Professional processor Model Number: AT-600 Additional Model: AT-600PRO, AT-600PRO+, AD-7600HD, AD-7600HDII FCC ID: 2BRNE-AT-600 Applicant: Guangzhou ToneWinner Electronics CO.,Ltd Address: Building 2, No.1, Hongsheng 3 Road, Dashi, Panyu, Guangzhou 511430, China Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2509050 Date of Test: Aug. 11, 2025~ Nov. 12, 2025 Date of Report: Nov. 17, 2025 Page 2 of 5 Report No. ESTE-R2509050 Maximum Permissible Exposure 1. Applicable Standards 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 limit for maximum permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as a mobile device whereby a distance of 0.2m normally can be maintained between the user and the device. 1.1. Limits for Maximum Permissible Exposure (MPE) (a) Limits for Occupational/Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times ︱E︱ 2 ,︱H︱ 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-10000 5 6 (b) Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times ︱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)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-10000 1.o 30 Note: f=frequency in MHz; *Plane-wave equivalent power density Page 3 of 5 Report No. ESTE-R2509050 1.2. MPE Calculation Method E (V/m) = d G × P × 30 Power Density: Pd (W/m 2 ) = 377 E 2 E = Electric Field (V/m) P = Peak RF output Power (W) G = EUT Antenna numeric gain (numeric) d = Separation distance between radiator and human body (m) The formula can be changed to Pd = 2 d × 377 G × P × 30 From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of the used antenna, the RF power density can be obtained Page 4 of 5 Report No. ESTE-R2509050 2. Conducted Power Result Mode Frequency (MHz) Peak output power (dBm) Peak output power (mW) GFSK 2402 2.93 1.963 2441 2.78 1.897 2480 1.71 1.483 π/4-DQPSK 2402 3.5 2.239 2441 3.4 2.188 2480 2.39 1.734 8-DPSK 2402 3.65 2.317 2441 3.55 2.265 2480 2.45 1.758 BLE 1M 2402 3.52 2.249 2440 3.46 2.218 2480 2.37 1.726 BLE 2M 2402 4.23 2.649 2440 4.15 2.600 2480 3.12 2.051 IEEE 802.11b 2412 13.51 22.439 2437 12.97 19.815 2462 12.96 19.770 IEEE 802.11g 2412 13.56 22.699 2437 13.07 20.277 2462 13.57 22.751 IEEE 802.11n HT20 2412 13.62 23.014 2437 13.16 20.701 2462 13.69 23.388 IEEE 802.11n HT40 2422 11.59 14.421 2437 11.36 13.677 2452 11.37 13.709 Page 5 of 5 Report No. ESTE-R2509050 3. Calculated Result and Limit Mode Peak output power (dBm) Target power (dBm) MAX Target power (dBm) Antenna gain Power Density (S) (mW /cm 2 ) Limited of Power Density (S) (mW /cm 2 ) Test Result (dBi) (Linear) 2.4G Band GFSK 2.93 2±1 3 -0.02 0.995 0.00040 1 Complies π/4-DQPSK 3.50 3±1 4 -0.02 0.995 0.00050 1 Complies 8-DPSK 3.65 3±1 4 -0.02 0.995 0.00050 1 Complies BLE 4.23 4±1 5 -0.02 0.995 0.00063 1 Complies IEEE 802.11b 13.51 13±1 14 1.89 1.545 0.00772 1 Complies IEEE 802.11g 13.57 13±1 14 1.89 1.545 0.00772 1 Complies IEEE 802.11n HT20 13.69 13±1 14 1.89 1.545 0.00772 1 Complies IEEE 802.11n HT40 11.59 11±1 12 1.89 1.545 0.00487 1 Complies End of Test Report

CoveredEquipmentCertificationAttestationLetter FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA ATTN.:ReviewingEngineer FCCID:2BRNE-AT-600 GuangzhouToneWinnerElectronicsCo.,Ltdcertifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedbyanyof theentitiesidentifiedonthecurrentCoveredList,theapplicantshouldincludean explanationonwhytheequipmentisnot“covered”equipment. GuangzhouToneWinnerElectronicsCo.,Ltdcertifiesthat,asofthedateofthefilingof theapplication,theapplicantisnotidentifiedontheCoveredList(asaspecifically namedentityoranyofitssubsidiariesoraffiliates)asanentityproducing“covered” equipment. GuangzhouToneWinnerElectronicsCo.,Ltdcertifiesthattheequipmentforwhich authorizationissoughtdoesnotincludecybersecurityoranti-virussoftwareproducedor providedbyKasperskyLab,Inc.oranyofitssuccessorsandassignees,including equipmentwithintegratedKasperskyLab,Inc.(oranyofitssuccessorsandassignees) cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446D01 CoveredEquipmentGuidancesectionB(2a). Signed: Name:HelenZhao Title:Safetyengineer Company:GuangzhouToneWinnerElectronicsCo.,Ltd Date:11/20/2025

InternalPhotos M/N:AT-600 InternalPhotos M/N:AT-600 InternalPhotos M/N:AT-600 InternalPhotos M/N:AT-600 InternalPhotos M/N:AT-600 InternalPhotos M/N:AT-600

LabelLocation

ExternalPhotos M/N:AT-600 ExternalPhotos M/N:AT-600 ExternalPhotos M/N:AT-600

GuangzhouToneWinnerElectronicsCo.,Ltd I,thesigner, Inadditiontothemodelname,PCBLayout,componentsandcomponent layout,allelectricalconstructionandmechanicalconstruction. Theyareidenticalexceptmodelname. ProductName:Professionalprocessor ModelNumber：AT-600 FCCID：2BRNE-AT-600 AdditionalModel: AT-600,AT-600PRO,AT-600PRO+,AD-7600HD, AD-7600HDII Signed: Name:HelenZhao Title:Safetyengineer Company:GuangzhouToneWinnerElectronicsCo.,Ltd Date:11/25/2025

DATE:11/20/2025 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2BRNE-AT-600 ProductName:Professionalprocessor RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommissionsrules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: Schematics Blockdiagram  Operationdescription Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. <Signature> Name:HelenZhao Title:Safetyengineer Company:GuangzhouToneWinnerElectronicsCo.,Ltd

DATE:11/20/2025 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 AuthoritytoActasAgent Onourbehalf,IappointESTTechnologyCo.,Ltd.Address:Chilingxiang,Qishantou, Santun,Houjie,Dongguan,Guangdong,Chinatoactasouragentinthepreparationof thisapplicationforequipmentcertification.Icertifythatsubmitteddocumentsproperly describethedeviceorsystemforwhichequipmentcertificationissought.Ialsocertifythat eachunitmanufactured,importedormarketed,asdefinedintheFederalCommunications Commission’sregulationswillhaveaffixedtoitalabelidenticaltothatsubmittedfor approvalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonour behalf,Iacknowledgethatallresponsibilityforcomplyingwiththetermsandconditions forcertification,stillresideswithGuangzhouToneWinnerElectronicsCo.,LtdAddress: Building2,No.1,HongSheng3Road,Dashi,Panyu,Guangzhou,Guangdong,China; <Signature> Name:HelenZhao Title:Safetyengineer Company:GuangzhouToneWinnerElectronicsCo.,Ltd

* theapplicantmustdesignateacontactlocatedintheUnitedStatesforpurposesofactingasthe applicant’sagentforserviceofprocess,regardlessofwhethertheapplicantisadomesticorforeign entity.AnapplicantlocatedintheUnitedStatesmaydesignateitselfastheagentforserviceofprocess. U.S.AgentDesignationforServiceofProcess- CertificationAttestationLetter 11/1/2023 TO:FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 ATTN.:ReviewingEngineer FCCID:2BRNE-AT-600 FRNofapplicant:0037391786 Persection2.911(d)(7)oftheFCCrules,GuangzhouToneWinnerElectronicsCo.,Ltd(“the applicant”)certifiesthattheequipmentforwhichauthorizationissoughtisdesignatedtothe followingU.S.agent*forserviceofprocess: CompanyName:SUMMITHIFIAUDIOLLC FCCRegistrationNumber(FRN): PhysicalU.S.CompanyAddress:79014THSTNSTE300ST.PETERSBURG,FL.US33702USA ContactPerson:TAYLORNEWMAN AgentEmailAddress:[email protected] Theabovecontactpersonacceptstheobligationforserviceofprocess. Theapplicantacceptstomaintainanagentfornolessthanoneyearafterthegranteehas terminatedallmarketingandimportationortheconclusionofanyCommission-related proceedinginvolvingtheequipment. ApplicantSigned:AgentSigned(ifdifferentfromApplicant): Signed:Signed: Printedname:HelenZhaoPrintedname:Aamirvahidy Title: Safetyengineer Title:AMBR CompanyName:GuangzhouToneWinnerElectronicsCo.,LtdCompanyName:SUMMITHIFIAUDIOLLC Date:11/20/2025Date:11/20/2025