2AN3WM5DUALKEYM5DualKey

DualKey 1. Description The DualKey is a programmable dual-button input development board. It is equipped with the ESP32-S3FN8 microcontroller, and features two mechanical keyboard switches (blue switches) and two programmable RGB LEDs on the front, providing excellent interactive feedback. With a built-in 350mAh lithium battery and low-power design, it offers good battery life. Utilizing the expandable design of the M5Stack Chain series, it is equipped with two HY2.0-4P expansion interfaces, supporting horizontal expansion and connection to other sensor devices. Leveraging the USB-OTG peripheral function built into the ESP32-S3, it is suitable for applications such as smart home, keyboard peripherals, and macro keyboards. 2. Specifications Specification Parameters SoC ESP32-S3FN8 @ Dual-core Xtensa LX7 processor, up to 240MHz main frequency Flash 8MB Input Power USB: DC 5V RGB LED 2x WS2812B Operating Temperature 0~40°C Product Size 47.9 x 23.9x 34.35mm 3. Quick Start 3.1 Preparation 1. Visit the official Arduino website and install the Arduino IDE https://www.arduino.cc/en/Main/Software 2. Add the following Board Manager URL to File → Preferences → Additional Boards Manager URLs: https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json 3. Open the Boards Manager, search for "ESP32", and click install. 4. After installation, select the board "ESP32S3 Dev Module" 5. Configure the following options. USB CDC On Boot: "Enabled", USB Mode: "Hardware CDC and JTAG" 3.2 Wi-Fi Scan Select the example program "Examples" → "WiFi" → "WiFiScan", choose the port corresponding to your device, and click the compile and upload button in the top-left corner. After uploading is complete, open the Serial Monitor to view Wi-Fi scan information. 3.3 BLE Scan Select the example program "Examples" → "BLE" → ”Scan”, choose the port corresponding to your device, and click the compile and upload button in the top-left corner. After uploading is complete, open the Serial Monitor to view BLE scan information. 4. FCC Warning FCC Caution: Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 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. IMPORTANT NOTE: Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: — Reorient or relocate the receiving antenna. — Increase the separation between the equipment and receiver. — Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. — Consult the dealer or an experienced radio/TV technician for help. FCC Radiation Exposure Statement: This model product has been tested and meets the RF exposure guidelines with the test distance 0mm for body worn. The highest SAR1g value is 0.174 W/Kg. The use of belt clips, holsters and similar accessories should not contain metallic components in its assembly. The use of accessories that do not satisfy these requirements may not comply with RF exposure requirements, and should be avoided

Page1of31ReportNo.:AiTSZ-250902004FW1 Note:Thisdevicehasbeentestedandfoundtocomplywiththestandard(s)listed,thistestreportmerelycorrespondstothe testsample.Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetestlaboratory.This reportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofGuangdongAsiaHongkeTestTechnologyLimited. Ifthereisaneedtoalterorrevisethisdocument,therightbelongstoGuangdongAsiaHongkeTestTechnologyLimited,and itshouldgiveapriorwrittennoticeoftherevisiondocument.Thistestreportmustnotbeusedbytheclienttoclaimproduct endorsement. GuangdongAsiaHongkeTestTechnologyLimited B1/F,Building11,JunfengIndustrialPark,ChongqingRoad,HepingCommunity,FuhaiStreet,Bao'anDistrict,Shenzhen, Guangdong,China. TESTREPORT ProductName:M5DualKey BrandName: Model: DualKey SeriesModel: ESP-DualKey FCCID: 2AN3WM5DUALKEY Applicant:M5StackTechnologyCo.,Ltd Address: BlockA10,ExpoBaySouthCoast,FuhaiStreet,Bao'anDistrict, Shenzhen,China Manufacturer:M5StackTechnologyCo.,Ltd Address: BlockA10,ExpoBaySouthCoast,FuhaiStreet,Bao'anDistrict, Shenzhen,China Standard(s):FCCCFRTitle47Part15SubpartCSection15.247 DateofReceipt:Sep.02,2025 DateofTest:Sep.02,2025~Sep.11,2025 IssuedDate:Sep.12,2025 IssuedBy: GuangdongAsiaHongkeTestTechnologyLimited B1/F,Building11,JunfengIndustrialPark,ChongqingRoad,HepingCommunity,FuhaiStreet, Bao'anDistrict,Shenzhen,Guangdong,China Tel.:+860755-230967639Fax.:+860755-230967639 Reviewedby:Approvedby: Aalen.YeAllenWang Page 2 of 31 ReportNo.:AiTSZ-250902004FW1 ReportReviseRecord ReportVersionIssuedDateNotes M1Sep.12,2025InitialRelease Page 3 of 31 ReportNo.:AiTSZ-250902004FW1 Contents 1TESTSUMMARY..........................................................................................................................................................4 1.1TESTSTANDARDS..........................................................................................................................................................4 1.2TESTSUMMARY...........................................................................................................................................................4 1.3TESTFACILITY...............................................................................................................................................................5 1.4MEASUREMENTUNCERTAINTY........................................................................................................................................5 2GENERALINFORMATION.............................................................................................................................................6 2.1ENVIRONMENTALCONDITIONS........................................................................................................................................6 2.2GENERALDESCRIPTIONOFEUT......................................................................................................................................6 2.3DESCRIPTIONOFTESTMODESANDTESTFREQUENCY........................................................................................................7 2.4SPECIALACCESSORIES....................................................................................................................................................8 2.5EQUIPMENTLISTFORTHETEST......................................................................................................................................8 3TESTCONDITIONSANDRESULTS...............................................................................................................................10 3.1CONDUCTEDEMISSIONSTEST.......................................................................................................................................10 3.2RADIATEDEMISSIONSANDBANDEDGE.........................................................................................................................13 3.3MAXIMUMPEAKCONDUCTEDOUTPUTPOWER.............................................................................................................20 3.4POWERSPECTRALDENSITY..........................................................................................................................................21 3.56DBBANDWIDTH.......................................................................................................................................................22 3.6OUT-OF-BANDEMISSIONS...........................................................................................................................................23 3.7ANTENNAREQUIREMENT.............................................................................................................................................25 4TESTSETUPPHOTOGRAPHSOFEUT..........................................................................................................................26 5PHOTOSOFEUT........................................................................................................................................................27 Page 4 of 31 ReportNo.:AiTSZ-250902004FW1 1TESTSUMMARY 1.1TestStandards Thetestswereperformedaccordingtofollowingstandards: FCCRulesPart15.247:FrequencyHopping,DirectSpreadSpectrumandHybridSystemsthatarein operationwithinthebandsof902-928MHz,2400-2483.5MHz,and5725-5850MHz ANSIC63.10:2013:AmericanNationalStandardforTestingUnlicensedWirelessDevices KDB558074D0115.247MeasGuidancev05r02:GuidanceforComplianceMeasurementsonDigital TransmissionSystem,FrequencyHoppingSpredaSpectrumSystem,andHybridSystemDevices OperatingUnderSection15.247oftheFCCRules 1.2TestSummary TestItemSectionin47CFRResult Antennarequirement§15.203Pass OnTimeandDutyCycle// ACPowerLineConductedEmission§15.207(a)Pass MaximumConductedPeakOutput Power §15.247(b)(3)Pass -6dBBandwidth§15.247(a)(2)Pass PowerSpectralDensity§15.247(e)Pass TransmitterRadiatedSpurious Emission §15.205/15.209Pass RestrictedBands§15.205/15.209PASS ConductedUnwantedemissionsand Bandedge …

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FCCID:2AN3WM5DUALKEY TestPositions FrontSide (Separationdistanceof0mm) BackSide (Separationdistanceof0mm) LeftSide (Separationdistanceof0mm) RightSide (Separationdistanceof0mm) TopSide (Separationdistanceof0mm) BottomSide (Separationdistanceof0mm)

Page1of2FCCID: 2AN3WM5DUALKEY Page2of2FCCID: 2AN3WM5DUALKEY

Page9of14ReportNo.:AiTSZ-250902004FW1 IEEE802.11g_Channel6_20MHz_Antenna0IEEE802.11g_Channel11_20MHz_Antenna0 IEEE802.11n_Channel1_20MHz_Antenna0IEEE802.11n_Channel6_20MHz_Antenna0 IEEE802.11n_Channel11_20MHz_Antenna0IEEE802.11n_Channel3_40MHz_Antenna0 IEEE802.11n_Channel6_40MHz_Antenna0IEEE802.11n_Channel9_40MHz_Antenna0 Page10of14ReportNo.:AiTSZ-250902004FW1 ConductedOutOfBandEmission TestResult ModeChannelAnt. OOB Emission Frequency (MHz) OOB Emission Level (dBm) Limit (dBm) OverLimit (dB) Result IEEE802.11b 1 0 2396.19-46.162-21.66-24.502PASS 2400.00-47.740-21.66-26.080PASS 24997.5-38.895-21.66-17.235PASS 624292.7-40.064-21.18-18.884PASS 11 2483.50-52.270-21.92-30.350PASS 24958.2-40.216-21.92-18.296PASS IEEE802.11g 1 2398.53-34.179-25.29-8.889PASS 2400.00-34.430-25.29-9.140PASS 24841.4-38.777-25.29-13.487PASS 624983.1-40.232-25.13-15.102PASS 11 2483.50-45.880-25.36-20.520PASS 24993.1-39.855-25.36-14.495PASS IEEE 802.11n_20 1 2397.88-40.179-26.26-13.919PASS 2400.00-40.700-26.26-14.440PASS 24881.4-39.818-26.26-13.558PASS 624355.1-39.857-26.5-13.357PASS 11 2483.50-47.280-26.67-20.610PASS 24187.2-39.794-26.67-13.124PASS IEEE 802.11n_40 3 2397.10-40.483-29.81-10.673PASS 2400.00-43.920-29.81-14.110PASS 24973.8-39.714-29.81-9.904PASS 624949.4-39.762-29.56-10.202PASS 9 2483.50-46.620-30.11-16.510PASS 24437.5-39.664-30.11-9.554PASS TestGraphs In-BandReferenceLevel IEEE802.11b_Channel1_20MHz_Antenna0 OutOfBandEmission IEEE802.11b_Channel1_20MHz_Antenna0 Page11of14ReportNo.:AiTSZ-250902004FW1 30.0MHz-25000.0MHz IEEE802.11b_Channel1_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11b_Channel6_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11b_Channel6_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11b_Channel11_20MHz_Antenna0 OutOfBandEmission IEEE802.11b_Channel11_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11b_Channel11_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11g_Channel1_20MHz_Antenna0 OutOfBandEmission IEEE802.11g_Channel1_20MHz_Antenna0 Page12of14ReportNo.:AiTSZ-250902004FW1 30.0MHz-25000.0MHz IEEE802.11g_Channel1_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11g_Channel6_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11g_Channel6_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11g_Channel11_20MHz_Antenna0 OutOfBandEmission IEEE802.11g_Channel11_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11g_Channel11_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel1_20MHz_Antenna0 OutOfBandEmission IEEE802.11n_Channel1_20MHz_Antenna0 Page13of14ReportNo.:AiTSZ-250902004FW1 30.0MHz-25000.0MHz IEEE802.11n_Channel1_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel6_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11n_Channel6_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel11_20MHz_Antenna0 OutOfBandEmission IEEE802.11n_Channel11_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11n_Channel11_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel3_40MHz_Antenna0 OutOfBandEmission IEEE802.11n_Channel3_40MHz_Antenna0 Page14of14ReportNo.:AiTSZ-250902004FW1 30.0MHz-25000.0MHz IEEE802.11n_Channel3_40MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel6_40MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11n_Channel6_40MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel9_40MHz_Antenna0 OutOfBandEmission IEEE802.11n_Channel9_40MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11n_Channel9_40MHz_Antenna0 **********************EndofReport**********************

Page1of14ReportNo.:AiTSZ-250902004FW1 DutyCycle TestResult ModeDataratesChannelAntenna OnTime (ms) Period (ms) Duty Cycle(%) Duty Cycle (linear) Duty Cycle Factor (dB) 1/T IEEE 802.11b 1 1 1 32.95032.97699.920.99920.00350.0303 632.95433.81697.450.97450.11220.0303 1132.95032.97699.920.99920.00350.0303 IEEE 802.11g 15.4945.52299.510.99510.02130.1820 65.4925.51999.510.99510.02130.1821 115.4945.52299.510.99510.02130.1820 IEEE 802.11n_20 MCS0 15.0895.11899.420.99420.02530.1965 65.0895.11899.420.99420.02530.1965 115.0895.11899.420.99420.02530.1965 IEEE 802.11n_40 32.4722.50498.720.98720.05590.4045 62.4732.50498.760.98760.05420.4044 92.4722.50398.760.98760.05420.4045 TestGraphs IEEE802.11b_20MHz_Channel1IEEE802.11b_20MHz_Channel6 IEEE802.11b_20MHz_Channel11IEEE802.11g_20MHz_Channel1 Page2of14ReportNo.:AiTSZ-250902004FW1 IEEE802.11g_20MHz_Channel6IEEE802.11g_20MHz_Channel11 IEEE802.11n_20MHz_Channel1IEEE802.11n_20MHz_Channel6 IEEE802.11n_20MHz_Channel11IEEE802.11n_40MHz_Channel3 IEEE802.11n_40MHz_Channel6IEEE802.11n_40MHz_Channel9 Page3of14ReportNo.:AiTSZ-250902004FW1 ConductedOutputPower TestResult ConductedOutputPower ModeChannel Ant.0 (dBm) Limit (dBm) Result IEEE802.11b 112.14≤30PASS 612.70≤30PASS 1112.22≤30PASS IEEE802.11g 112.66≤30PASS 612.55≤30PASS 1112.44≤30PASS IEEE802.11n_20 111.25≤30PASS 611.31≤30PASS 1111.11≤30PASS IEEE802.11n_40 311.22≤30PASS 611.20≤30PASS 911.20≤30PASS Page4of14ReportNo.:AiTSZ-250902004FW1 PowerSpectralDensity TestResult ModeChannel PSD (dBm/3kHz) Ant.0 Limit (dBm/3kHz) Result IEEE802.11b 1-15.990 ≤8 PASS 6-15.580PASS 11-16.340PASS IEEE802.11g 1-19.640PASS 6-19.350PASS 11-19.580PASS IEEE802.11n_20 1-20.160PASS 6-20.040PASS 11-20.250PASS IEEE802.11n_40 3-22.910PASS 6-23.090PASS 9-22.790PASS TestGraphs IEEE802.11b_Channel1_20MHz_Antenna0IEEE802.11b_Channel6_20MHz_Antenna0 IEEE802.11b_Channel11_20MHz_Antenna0IEEE802.11g_Channel1_20MHz_Antenna0 Page5of14ReportNo.:AiTSZ-250902004FW1 IEEE802.11g_Channel6_20MHz_Antenna0IEEE802.11g_Channel11_20MHz_Antenna0 IEEE802.11n_Channel1_20MHz_Antenna0IEEE802.11n_Channel6_20MHz_Antenna0 IEEE802.11n_Channel11_20MHz_Antenna0IEEE802.11n_Channel3_40MHz_Antenna0 IEEE802.11n_Channel6_40MHz_Antenna0IEEE802.11n_Channel9_40MHz_Antenna0 Page6of14ReportNo.:AiTSZ-250902004FW1 99%Bandwidth TestResult ModeChannelAnt. CenterFrequency (MHz) 99%BW(MHz) IEEE802.11b 1 0 241212.910 6243712.914 11246212.944 IEEE802.11g 1241216.511 6243716.511 11246216.519 IEEE802.11n_20 1241217.305 6243717.317 11246217.314 IEEE802.11n_40 3242235.679 6243735.687 9245235.644 TestGraphs IEEE802.11b_Channel1_20MHz_Antenna0IEEE802.11b_Channel6_20MHz_Antenna0 IEEE802.11b_Channel11_20MHz_Antenna0IEEE802.11g_Channel1_20MHz_Antenna0 Page7of14ReportNo.:AiTSZ-250902004FW1 IEEE802.11g_Channel6_20MHz_Antenna0IEEE802.11g_Channel11_20MHz_Antenna0 IEEE802.11n_Channel1_20MHz_Antenna0IEEE802.11n_Channel6_20MHz_Antenna0 IEEE802.11n_Channel11_20MHz_Antenna0IEEE802.11n_Channel3_40MHz_Antenna0 IEEE802.11n_Channel6_40MHz_Antenna0IEEE802.11n_Channel9_40MHz_Antenna0 Page8of14ReportNo.:AiTSZ-250902004FW1 6dBBandwidth TestResult ModeChannelAnt. Center Frequency (MHz) 6dBBandwidth (MHz) Limit (MHz) Result IEEE802.11b 1 0 24128.850 ≥0.5 PASS 624379.580PASS 1124629.280PASS IEEE802.11g 1241216.31PASS 6243716.30PASS 11246216.06PASS IEEE802.11n_20 1241216.32PASS 6243716.53PASS 11246216.31PASS IEEE802.11n_40 3242235.05PASS 6243733.85PASS 9245235.08PASS TestGraphs IEEE802.11b_Channel1_20MHz_Antenna0IEEE802.11b_Channel6_20MHz_Antenna0 IEEE802.11b_Channel11_20MHz_Antenna0IEEE802.11g_Channel1_20MHz_Antenna0

Page 1 of 11 Report No.: AiTSZ-250902004FW2 Duty Cycle Test Result Mode Channel On Time (ms) Period (ms) Duty Cycle (%) Duty Cycle (linear) Duty Cycle Factor (dB) 1/T BLE 1M 0 2.097 2.499 83.90 0.8390 0.7624 0.4769 19 2.097 2.499 83.90 0.8390 0.7624 0.4769 39 2.097 2.499 83.90 0.8390 0.7624 0.4769 BLE 2M 0 1.061 1.874 56.59 0.5659 2.4726 0.9425 19 1.060 1.874 56.55 0.5655 2.4757 0.9434 39 1.060 1.874 56.58 0.5658 2.4734 0.9434 Test Graphs BLE 1M_Channel 0 BLE 1M_Channel 19 BLE 1M_Channel 39 BLE 2M_Channel 0 BLE 2M_Channel 19 BLE 2M_Channel 39 Page 2 of 11 Report No.: AiTSZ-250902004FW2 Page 3 of 11 Report No.: AiTSZ-250902004FW2 Conducted Output Power Test Result Mode Channel Peak Output Power (dBm) Limit (dBm) Result BLE 1M 0 0.36 ≤30 PASS 19 1.06 ≤30 PASS 39 2.10 ≤30 PASS BLE 2M 0 0.47 ≤30 PASS 19 1.39 ≤30 PASS 39 1.96 ≤30 PASS Test Graphs Peak Output Power BLE 1M_Channel 0 Peak Output Power BLE 1M_Channel 19 Peak Output Power BLE 1M_Channel 39 Peak Output Power BLE 2M_Channel 0 Peak Output Power BLE 2M_Channel 19 Peak Output Power BLE 2M_Channel 39 Page 4 of 11 Report No.: AiTSZ-250902004FW2 Page 5 of 11 Report No.: AiTSZ-250902004FW2 Power Spectral Density Test Result Mode Channel PSD (dBm/3kHz) Limit (dBm/3kHz) Result BLE 1M 0 -14.790 ≤8 PASS BLE 1M 19 -13.900 ≤8 PASS BLE 1M 39 -13.060 ≤8 PASS BLE 2M 0 -16.910 ≤8 PASS BLE 2M 19 -15.980 ≤8 PASS BLE 2M 39 -15.390 ≤8 PASS Test Graphs BLE 1M_Channel 0 BLE 2M_Channel 0 BLE 1M_Channel 19 BLE 2M_Channel 19 BLE 1M_Channel 39 BLE 2M_Channel 39 Page 6 of 11 Report No.: AiTSZ-250902004FW2 99% Bandwidth Test Result Mode Channel Center Frequency (MHz) 99% BW (MHz) BLE 1M 0 2402 1.0339 BLE 1M 19 2440 1.0358 BLE 1M 39 2480 1.0317 BLE 2M 0 2402 2.0447 BLE 2M 19 2440 2.0262 BLE 2M 39 2480 2.0432 Test Graphs BLE 1M_Channel 0 BLE 2M_Channel 0 BLE 1M_Channel 19 BLE 2M_Channel 19 BLE 1M_Channel 39 BLE 2M_Channel 39 Page 7 of 11 Report No.: AiTSZ-250902004FW2 6dB Bandwidth Test Result Mode Channel Center Frequency (MHz) 6 dB Bandwidth (MHz) Limit (MHz) Result BLE 1M 0 2402 0.6400 ≥0.5 PASS 19 2440 0.6400 PASS 39 2480 0.6400 PASS BLE 2M 0 2402 1.100 PASS 19 2440 1.100 PASS 39 2480 1.110 PASS Test Graphs BLE 1M_Channel 0 BLE 2M_Channel 0 BLE 1M_Channel 19 BLE 2M_Channel 19 BLE 1M_Channel 39 BLE 2M_Channel 39 Page 8 of 11 Report No.: AiTSZ-250902004FW2 Page 9 of 11 Report No.: AiTSZ-250902004FW2 Conducted Out Of Band Emission Test Result Mode Channel OOB Emission Frequency (MHz) OOB Emission Level (dBm) Limit (dBm) Over Limit (dB) Result BLE 1M 0 2400.00 -54.850 -19.76 -35.090 PASS 24896.4 -50.043 -19.76 -30.283 PASS 19 24987.5 -50.130 -19.04 -31.090 PASS 39 2483.50 -59.030 -18.07 -40.960 PASS 24711.0 -50.160 -18.07 -32.090 PASS BLE 2M 0 2400.00 -48.500 -19.64 -28.860 PASS 24985.6 -49.823 -19.64 -30.183 PASS 19 24970.7 -49.302 -18.78 -30.522 PASS 39 2483.50 -57.970 -18.31 -39.660 PASS 24979.4 -50.058 -18.31 -31.748 PASS Test Graphs In-Band Reference Level BLE 1M_Channel 0 In-Band Reference Level BLE 2M_Channel 0 Out Of Band Emission BLE 1M_Channel 0 Out Of Band Emission BLE 2M_Channel 0 Page 10 of 11 Report No.: AiTSZ-250902004FW2 30.0 MHz - 25000.0 MHz BLE 1M_Channel 0 30.0 MHz - 25000.0 MHz BLE 2M_Channel 0 In-Band Reference Level BLE 1M_Channel 19 In-Band Reference Level BLE 2M_Channel 19 30.0 MHz - 25000.0 MHz BLE 1M_Channel 19 30.0 MHz - 25000.0 MHz BLE 2M_Channel 19 In-Band Reference Level BLE 1M_Channel 39 In-Band Reference Level BLE 2M_Channel 39 Page 11 of 11 Report No.: AiTSZ-250902004FW2 Out Of Band Emission BLE 1M_Channel 39 Out Of Band Emission BLE 2M_Channel 39 30.0 MHz - 25000.0 MHz BLE 1M_Channel 39 30.0 MHz - 25000.0 MHz BLE 2M_Channel 39

OTA Antenna Performance Data Summary APPLICANT : M5Stack Technology Co., Ltd EQUIPMENT : M5DualKey BRAND NAME : M5Stack MODEL NAME : DualKey ANTENNA TYPE : PCB Antenna DEVICE RECEIVING DATE : Aug. 28, 2025 TEST DATE : Aug. 28, 2025 Tested by: Reviewed by: Jinshan Zheng / Senior Engineer Johnny Chen / Manager Sporton International Inc. (Shenzhen) 1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People’s Republic of China Sporton International Inc. (Shenzhen) Page Number : 2 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 Table of Contents Revision History -------------------------------------------------------------------------------------------------------------------------------- 3 1. Administration Data ----------------------------------------------------------------------------------------------------------------------- 4 1.1 Testing Laboratory ----------------------------------------------------------------------------------------------------------------- 4 1.2 Applicant ----------------------------------------------------------------------------------------------------------------------------- 4 2. Product Photo ------------------------------------------------------------------------------------------------------------------------------- 5 3. Measurement Environment ------------------------------------------------------------------------------------------------------------- 6 3.1 Ambient Condition ----------------------------------------------------------------------------------------------------------------- 6 3.2 Measurement Uncertainty ------------------------------------------------------------------------------------------------------- 6 4. Summary of Test Result of Antenna Gain ------------------------------------------------------------------------------------------ 7 5. Description for EUT Testing Position ------------------------------------------------------------------------------------------------ 8 6. Free Space Position Antenna Gain Patterns -------------------------------------------------------------------------------------- 9 Sporton International Inc. (Shenzhen) Page Number : 3 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 Revision History DATA NO. VERSION DESCRIPTION ISSUED DATE OQ582718 1.0 Initial issue of Data Summary Aug. 29, 2025 Sporton International Inc. (Shenzhen) Page Number : 4 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 1. Administration Data 1.1 Testing Laboratory Test Site Sporton International Inc. (Shenzhen) Test Site Location 1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055, People’s Republic of China TEL: +86-755-86379589 FAX: +86-755-86379595 Chamber □ OTA01-SZ ■ OTA02-SZ □ OTA03-SZ ■: Indicates the chamber(s) used in this data summary. 1.2 Applicant Company Name M5Stack Technology Co., Ltd Address 5F, Tangwei Stock Commercial Building Youli Road, Bao'an District, Shenzhen, Guangdong, China Sporton International Inc. (Shenzhen) Page Number : 5 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 2. Product Photo Sporton International Inc. (Shenzhen) Page Number : 6 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 3. Measurement Environment 3.1 Ambient Condition Temperature (°C ): 25±5°C Humidity (%): <60% 3.2 Measurement Uncertainty The maximum expanded measurement uncertainty (k=2, at a 95% confidence level) as below: TRP Normal 617-698 MHz 699-798 MHz 814-894 MHz 1695-1780 MHz 1850-2020 MHz 2300-2800 MHz Free Space 1.45 1.38 1.26 1.40 1.47 1.52 TIS Normal 617-698 MHz 699-798 MHz 814-894 MHz 1850-2020 MHz 2110-2180 MHz 2300-2800 MHz Free Space 1.91 1.86 1.77 1.92 1.88 1.96 Sporton International Inc. (Shenzhen) Page Number : 7 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 4. Summary of Test Result of Antenna Gain Test / Position Antenna Gain / Free Space 2.4G WIFI Frequency (MHz) Directivity (dBi) Avg Gain(dBi) Efficiency (%) Peak Gain(dBi) 2400 6.84 -4.18 38.23 2.67 2410 6.84 -3.88 40.96 2.97 2420 6.88 -3.70 42.69 3.18 2430 6.83 -3.64 43.23 3.19 2440 6.88 -3.66 43.01 3.22 2450 6.85 -3.78 41.86 3.07 2460 6.87 -3.97 40.07 2.89 2470 6.81 -4.22 37.86 2.59 2480 6.78 -4.48 35.67 2.30 2490 6.64 -4.74 33.59 1.91 2500 6.57 -5.07 31.15 1.50 Sporton International Inc. (Shenzhen) Page Number : 8 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 5. Description for EUT Testing Position Placed and fixed with tape shown as below. Free Space Sporton International Inc. (Shenzhen) Page Number : 9 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 6. Free Space Position Antenna Gain Patterns Please refer to as below. Free Space for 2400MHz Total Gain (d Bi) -25 5 -20 -15 -10 -5 0 X Y Z Azi m uth = 0.0 El evati on = 0.0 Rol l = 0.0 Total Gain (d Bi) -25 5 -20 -15 -10 -5 0 Z X Y Azi m uth = 0.0 El evati on = 0.0 Rol l = -180.0 Sporton International Inc. (Shenzhen) Page Number : 10 of 19 TEL : +86-755-8637-9589 Issued Date : Aug. 29, 2025 FAX : +86-755-8637-9595 Version : 1.0 OTA Antenna Performance Data Summary DATA NO.: OQ582718 Free Space for 2410MHz Total Gain (d Bi) -25 5 -20 -15 -10 -5 0 X Y Z Azi m uth = 0.0 El evati on = 0.0 Rol l = 0.0 Total Gain (d Bi) -25 5 -20 …

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Page 1 of 26 Report No.: AiTSZ-250902004FW2 Note: This device has been tested and found to comply with the standard(s) listed, this test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. This report shall not be reproduced except in full, without the written approval of Guangdong Asia Hongke Test Technology Limited. If there is a need to alter or revise this document, the right belongs to Guangdong Asia Hongke Test Technology Limited, and it should give a prior written notice of the revision document. This test report must not be used by the client to claim product endorsement. Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China. TEST REPORT Product Name : M5DualKey Brand Name : Model : DualKey Series Model : ESP-DualKey FCC ID : 2AN3WM5DUALKEY Applicant : M5Stack Technology Co., Ltd Address : Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China Manufacturer : M5Stack Technology Co., Ltd Address : Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China Standard(s) : FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of Receipt : Sep. 02, 2025 Date of Test : Sep. 02, 2025~ Sep. 11, 2025 Issued Date : Sep. 12, 2025 Issued By: Guangdong Asia Hongke Test Technology Limited B1/F, Building 11, Junfeng Industrial Park, Chongqing Road, Heping Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong, China Tel.: +86 0755-230967639 Fax.: +86 0755-230967639 Reviewed by: Approved by: Aalen.Ye Allen Wang Page 2 of 26 Report No.: AiTSZ-250902004FW2 Report Revise Record Report Version Issued Date Notes M1 Sep. 12, 2025 Initial Release Page 3 of 26 Report No.: AiTSZ-250902004FW2 Contents 1 TEST SUMMARY ....................................................................................................................................................... 4 1.1 TEST STANDARDS ......................................................................................................................................................... 4 1.2 TEST SUMMARY ........................................................................................................................................................... 4 1.3 TEST FACILITY .............................................................................................................................................................. 5 1.4 MEASUREMENT UNCERTAINTY ........................................................................................................................................ 5 2 GENERAL INFORMATION .......................................................................................................................................... 6 2.1 ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 6 2.2 GENERAL DESCRIPTION…

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