2AN3WM5STOPWATCHM5StopWatch

Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China StopWatch Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China 1. Description StopWatch is a compact round smart terminal built for on-the-go interaction. Featuring an ESP32-S3R8 with 16MB Flash and 8MB PSRAM, it supports reliable 2.4GHz Wi-Fi +BLE communication. Its AMOLED touch display, programmable keys, and haptic vibration motor create a responsive and user-friendly experience. Combined with audio I/O, IMU sensing, RTC support, and versatile expansion options, StopWatch is a practical platform for timing tools, wearable interfaces, portable dashboards, and embedded IoT projects. Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China 2. Specifications Specification Parameters SoC ESP32-S3R8 @ Dual-core Xtensa LX7 Processor, up to 240MHz PSRAM 8MB Flash 16MB Communication 2.4 GHz Wi-Fi;BLE Display Touch-enabled circular AMOLED display Keys 2 x programmable keys + 1 x power key Haptic Feedback Built-in vibration motor Audio Codec ES8311 Microphone MEMS MIC Audio Amplifier AW8737A IMU BMI270 + BMM150 RTC RX8130CE Expansion Port HY2.0-4P Rear Expansion Bus 2.54 1x7P, 2.54 1x6P Mechanical Design Lanyard hole Power Management M5PM1 multi-stage power management Battery Capacity 450mAh Power Input USB Type-C, DC 5V Frequency Range for CE 2.4GWi-Fi:2412-2472MHz BLE:2402-2480MHz Maximum EIRP for CE 2.4GWi-Fi: 15.25 dBm BLE:7.26 dBm Hardware version NO. V1.0 Software version NO. V1.0 Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China 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 Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China 3. Open the Boards Manager, search for "ESP32", and click install. Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China 4. After installation, select the board "ESP32S3 Dev Module" 5. Configure the following options. USB CDC On Boot: "Enabled", PSRAM："OPI PSRAM", USB Mode: "Hardware CDC and JTAG" Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China 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. Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China 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. Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China Company Name：M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen,Guangdong,China 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 equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. The device has been tested and comply with FCC SAR limits.

Note: This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA, or any agency of the Federal Government. The information marked ―#‖ is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included but no need marked. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. Shenzhen Accurate Technology Co., Ltd. Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Tel: +86 755-26503290 Web: www.atc-lab.com Rev:A/4.0(2024/11/01) Page 1 of 34 TR-4-E-R050 TEST REPORT Applicant Name: M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao’an District, Shenzhen, China Report Number: 2604R12645E-SA FCC ID: 2AN3WM5STOPWATCH Test Standard (s) FCC 47 CFR part 2.1093 Sample Description Product Name: M5StopWatch Model No.: StopWatch Multiple Model(s) No.: TP-01-A Trade Mark: Date Received: 2026-03-26 Report Date: 2026-04-28 Test Result: The EUT complied with the standards above. Prepared and Checked By: Approved By: Jack Yang Lance Li SAR Engineer SAR Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Rev:A/4.0(2024/11/01) Page 2 of 34 TR-4-E-R050 Mode Max. Reported SAR Level(s) (W/kg) Limit (W/kg) Wi-Fi 2.4G 1g Body SAR 0.22 1.6 Applicable Standards FCC 47 CFR part 2.1093 Radiation exposure evaluation: portable devices RF Exposure Procedures: TCB Workshop April 2019 IEEE1528:2013 IEEE Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques KDB procedures KDB 447498 D01 General RF Exposure Guidance v06 KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz v01r04 KDB 865664 D02 RF Exposure Reporting v01r02 KDB 248227 D01 802.11 Wi-Fi SAR v02r02 Note: This wireless device has been shown to be capable of compliance for localized specific absorption rate (SAR) for General Population/Uncontrolled Exposure limits specified in FCC 47 CFR part 2.1093 and has been tested in accordance with the measurement procedures specified in IEEE 1528-2013 and RF exposure KDB procedures. The results and statements contained in this report pertain only to the device(s) evaluated. Unless otherwise stated there are no any additions to, deviations, or exclusions from the method. Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Rev:A/4.0(2024/11/01) Page 3 of 34 TR-4-E-R050 TABLE OF CONTENTS DOCUMENT REVISION HISTORY .................................................................................................. 4 EUT DESCRIPTION ......................................................................................................................... 5 Technical Specification ................................................................................................................................. 5 REFERENCE, STANDARDS, AND GUILDELINES ......................................................................... 6 SAR Limits ...................................................................................................................................................... 6 FACILITIES ...................................................................................................................................... 7 DESCRIPTION OF TEST SYSTEM .................................................................................................. 8 Recommended Tissue Dielectric Parameters for Head liquid .......................................................... 13 EQUIPMENT LIST AND CALIBRATION ........................................................................................ 14 Equipment’s List & Calibration Information ............................................................................................. 14 SAR MEASUREMENT SYSTEM VERIFICATION .......................................................................... 15 Liquid Verification......................................................................................................................................... 15 System Accuracy Verification .................................................................................................................... 16 EUT TEST STRATEGY AND METHODOLOGY ............................................................................ 18 SAR Evaluation Procedure ......................................................................................................................... 19 CONDUCTED OUTPUT POWER MEASUREMENT ...................................................................... 20 Test Procedure ............................................................................................................................................. 20 STANDALONE SAR TEST EXCLUSION CONSIDERATIONS ...................................................... 23 Standalone SAR estimation: ...................................................................................................................... 24 SAR MEASUREMENT RESULTS .................................................................................................. 25 Test Results: ................................................................................................................................................. 25 SAR Measurement Variability ...................................................................................................... 27 SAR DUT HOLDER PERTURBATIONS .............................................…

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Shenzhen Accurate Technology Co., Ltd. No.: 2604R12645E-RF Test Photos Test Photos Page 1 / 3 Photo of Power Line Conducted Emission Measurement Shenzhen Accurate Technology Co., Ltd. No.: 2604R12645E-RF Test Photos Test Photos Page 2 / 3 Radiated Spurious Emissions Test View (9kHz-30MHz) Radiated Spurious Emissions Test View (30MHz- 1GHz) Shenzhen Accurate Technology Co., Ltd. No.: 2604R12645E-RF Test Photos Test Photos Page 3 / 3 Radiated Spurious Emissions Test View (1GHz-18GHz) Radiated Spurious Emissions Test View (18GHz-25GHz) ***** END *****

Note: This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA, or any agency of the Federal Government. The information marked “#” is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included but no need marked. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. Shenzhen Accurate Technology Co., Ltd. Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Tel: +86 755-26503290 Web: www.atc-lab.com Rev:A/4.0(2024/11/01) Page 1 of 70 TR-4-E-R015 TEST REPORT Applicant Name: M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China Report Number: 2604R12645E-RF-00A FCC ID: 2AN3WM5STOPWATCH Test Standard (s) FCC PART 15.247 Sample Description Product Name: M5StopWatch Model No.: StopWatch, TP-01-A Trade Mark: Date Received: 2026-03-26 Report Date: 2026-04-28 Test Result: The EUT complied with the standards above. Prepared and Checked By: Approved By: Jason Fan Bob.Liao EMC Engineer EMC Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-RF-00A Rev:A/4.0(2024/11/01) Page 2 of 70 TR-4-E-R015 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ................................................................................................................ 4 GENERAL INFORMATION ............................................................................................................................ 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ........................................................................ 5 OBJECTIVE ................................................................................................................................................... 6 TEST METHODOLOGY .................................................................................................................................... 6 TEST FACILITY .............................................................................................................................................. 6 MEASUREMENT UNCERTAINTY ....................................................................................................................... 6 SYSTEM TEST CONFIGURATION ............................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION ......................................................................................................... 7 EUT EXERCISE SOFTWARE AND POWER LEVEL # ............................................................................................ 7 SPECIAL ACCESSORIES AND EQUIPMENT MODIFICATIONS ............................................................................... 7 SUPPORT EQUIPMENT LIST AND DETAILS ....................................................................................................... 7 EXTERNAL I/O CABLE .................................................................................................................................... 7 BLOCK DIAGRAM OF TEST SETUP .................................................................................................................. 8 SUMMARY OF TEST RESULTS ................................................................................................................. 10 TEST EQUIPMENT LIST ............................................................................................................................. 11 RF EXPOSURE ............................................................................................................................................ 12 ANTENNA REQUIREMENT ........................................................................................................................ 13 APPLICABLE STANDARD ............................................................................................................................... 13 ANTENNA CONNECTOR CONSTRUCTION ....................................................................................................... 13 AC LINE CONDUCTED EMISSIONS .......................................................................................................... 14 APPLICABLE STANDARD ............................................................................................................................... 14 EUT SETUP ................................................................................................................................................ 14 EMI TEST RECEIVER SETUP ........................................................................................................................ 14 TEST PROCEDURE ...................................................................................................................................... 14 CALCULATION ............................................................................................................................................. 15 TEST DATA ................................................................................................................................................. 15 RADIATED SPURIOUS EMISSIONS .......................................................................................................... 18 APPLICABLE STANDARD ............................................................................................................................... 18 EUT SETUP ..........................................................................…

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Note: This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA, or any agency of the Federal Government. The information marked “#” is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included but no need marked. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. Shenzhen Accurate Technology Co., Ltd. Floor 1, KuMaKe Building, Dongzhou Community, Guangming Street, Guangming District, Shenzhen, Guangdong, China. Tel: +86 755-26503290 Web: www.atc-lab.com Rev:A/4.0(2024/11/01) Page 1 of 96 TR-4-E-R016 TEST REPORT Applicant Name: M5Stack Technology Co.,Ltd Address: Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China Report Number: 2604R12645E-RF-00B FCC ID: 2AN3WM5STOPWATCH Test Standard (s) FCC PART 15.247 Sample Description Product Name: M5StopWatch Model No.: StopWatch, TP-01-A Trade Mark: Date Received: 2026-03-26 Report Date: 2026-04-09 Test Result: The EUT complied with the standards above. Prepared and Checked By: Approved By: Jason Fan Bob.Liao EMC Engineer EMC Engineer Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-RF-00B Rev:A/4.0(2024/11/01) Page 2 of 96 TR-4-E-R016 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ................................................................................................................ 4 GENERAL INFORMATION ............................................................................................................................ 5 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ........................................................................ 5 OBJECTIVE ................................................................................................................................................... 6 TEST METHODOLOGY .................................................................................................................................... 6 TEST FACILITY .............................................................................................................................................. 6 MEASUREMENT UNCERTAINTY ....................................................................................................................... 6 SYSTEM TEST CONFIGURATION ............................................................................................................... 7 DESCRIPTION OF TEST CONFIGURATION ......................................................................................................... 7 EUT EXERCISE SOFTWARE AND POWER LEVEL # ............................................................................................ 7 SPECIAL ACCESSORIES AND EQUIPMENT MODIFICATIONS ............................................................................... 7 SUPPORT EQUIPMENT LIST AND DETAILS ....................................................................................................... 8 EXTERNAL I/O CABLE .................................................................................................................................... 8 BLOCK DIAGRAM OF TEST SETUP .................................................................................................................. 8 SUMMARY OF TEST RESULTS ................................................................................................................. 10 TEST EQUIPMENT LIST ............................................................................................................................. 11 RF EXPOSURE ............................................................................................................................................ 12 ANTENNA REQUIREMENT ........................................................................................................................ 13 APPLICABLE STANDARD ............................................................................................................................... 13 ANTENNA CONNECTOR CONSTRUCTION ....................................................................................................... 13 AC LINE CONDUCTED EMISSIONS .......................................................................................................... 14 APPLICABLE STANDARD ............................................................................................................................... 14 EUT SETUP ................................................................................................................................................ 14 EMI TEST RECEIVER SETUP ........................................................................................................................ 14 TEST PROCEDURE ...................................................................................................................................... 14 CALCULATION ............................................................................................................................................. 15 TEST DATA ................................................................................................................................................. 15 RADIATED SPURIOUS EMISSION ............................................................................................................. 18 APPLICABLE STANDARD ............................................................................................................................... 18 EUT SETUP ........................................................................…

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CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 1 Date03/21/2026VersionNo.V1.0 深圳市榕盛源科技有限公司 ShenzhenRongshengyuanTechnologyCo.,Ltd 产品规格书 PRODUCTSPECIFICATION 客户 Customer M5StackTechnologyCo.,Ltd 客户编码 Customer’spartnumber 产品料号 ProductMaterialCode StopWatch 工作频段 WorkingBand 2400-2500MHz 发行日期 IssueDate 2026-03-21 发行版本 ReleaseVersion V1.0 作者 Author CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 1产品技术指标（PRODUCTTECHNICALSPECIFICATION） 电性能指标ElectricalSpecifications 频率范围FrequencyRange（MHz）2400-2500 频带宽度Bandwidth（MHz）100 输入阻抗InputImpendence（Ω）50 电压驻波比VSWR＜2.0 增益Gain（dBi）-4.79 极化形式PolarizationType垂直极化Vertical 机械指标MechanicalSpecifications 天线长度AntennaLength（mm）14.35*3.1mm 天线类型AntennaTypePCBAntenna 工作温度OperatinTemp（°C）-30～70 储存温度StoringTemp(°C)-30～70 2产品电性能参数（PRODUCTELECTRICALPERFORMANCEPARAMETER） 1.产品图片（Productpicture） 2.2反射损耗（S11） Antenna * CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 2.3驻波比(VSWR) 2.4史密斯图（SmithChart） 3 4 CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 2.5 效率、增益（Efficiency/Gain） Fre.(MHz)AVGGain(dBi)PeakGain(dB)Eff.(%) 2400-4.791.288.33 2410-4.191.849.71 2420-4.231.669.56 2430-4.361.529.63 2440-3.891.4510.98 2450-3.691.4512.35 2460-3.841.4512.90 2470-4.011.5413.63 2480-3.721.6514.53 2490-3.421.7015.34 2500-3.511.3515.27 5 CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 2.6辐射方向图 （RadiationPattern） 2400MHz 2410MHz 6 CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 2430MHz 2440MHz 7 CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 2450MHz 2460MHz 8 CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 2470MHz 2480MHz 9 CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 2490MHz 2500MHz 10 CopanyName：ShenzhenRongshengyuanTechnologyCo.,Ltd Adress:703,No.55AinanRoad,LongdongCommunity,BaolongStreet,LonggangDistrict,Shenzhen 3产品尺寸（Productdimensions） UNIT:14.35*3.1mm

Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 1 of 2 APPENDIX D RETURN LOSS&IMPEDANCE MEASUREMENT D2450V2 - SN:751 Extended Dipole Calibrations Per FCC KDB 865664 D01, calibration intervals of up to 3 years may be considered for reference dipoles when it is demonstrated that the SAR target, impedance and return loss of a dipole have remained stable according to the following requirements. 1. The measured SAR does not deviate more than 10% from the target on the calibration certificate. 2. The return-loss does not deviate more than 20% from the previous measurement and meets the required 20 dB minimum return-loss requirement. 3. The measurement of real or imaginary parts of impedance does not deviate more than 5Ω from the previous measurement. The following dipole was checked to pass the above 3 requirements to have 3-year calibration period from calibration date. Calibrated Equipment: Verification Date Equipment Model S/N Calibration Date Calibration Due Date 2024/09/25 Simulated Tissue Liquid Head HBBL600-10000V6 220406-1 Each Time SAM Twin Phantom SAM-Twin V5.0 1744 NCR NCR Network Analyzer E5071B MY42403851 2024/01/12 2025/01/11 Network Analyzer Calibration Kit 85033E MY53402696 NCR NCR 2025/09/24 Simulated Tissue Liquid Head HBBL600-10000V6 220406-1 Each Time SAM Twin Phantom SAM-Twin V5.0 1744 NCR NCR Network Analyzer E5071B MY42403851 2024/10/08 2025/10/07 Network Analyzer Calibration Kit 85033E MY53402696 NCR NCR Test Data: D2450V2 - SN:751 2450MHz Head Date of Measurement Return Loss (dB) Delta (%) Real Impedence(Ω) Delta (Ω) Imaginary Impedence(Ω) Delta (Ω) 2023/09/26 -25.2 / 53.9 / 4.18 / 2024/09/25 -27.5 9.1 50.2 3.7 4.23 0.05 2025/09/24 -26.5 5.2 49.7 4.2 4.7 0.52 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 2 of 2 Calibrated By: Lance Li Calibrated By: Lance Li

Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 15 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 16 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 17 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 18 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 19 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 20 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 21 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 22 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 23 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 24 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 25 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 26 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 27 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 28 of 28

Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 1 of 28 APPENDIX C CALIBRATION CERTIFICATES Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 2 of 28 Shenzhen Accurate Technology Co., Ltd. Report No.: 2604R12645E-SA Page 3 of 28 Shenzhe…

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