2BDLL-MET2501Mini ET Device 2.4G WIFI

Jan 2026

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/2 Report No.: SZCR251100526103 Page: 1 of 34 Keny Xu EMC Laboratory Manager SAR TEST REPORT Application No.: SZCR2511005261AT Applicant: Sophintech Manufacturing Co., Ltd. Address of Applicant: Room 303, Floor 3, Plant 1, No.13 Fuwan Road, Qianwu Town, Doumen District, Zhuhai City, Guangdong Province, 519170 China Manufacturer: Sophintech Manufacturing Co., Ltd. Address of Manufacturer: Room 303, Floor 3, Plant 1, No. 13 Fuwan Road, Qianwu Town, Doumen District, Zhuhai City, 519170, Guangdong Province, China EUT Description: Mini ET Device 2.4G WIFI Model No.: MET2501 FCC ID: 2BDLL-MET2501 Standards: FCC 47CFR §2.1093 Date of Receipt: 2025-11-28 Date of Test: 2025-12-30 to 2025-12-31 Date of Issue: 2026-01-04 Test Result : PASS* * In the configuration tested, the EUT detailed in this report complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/2 Report No.: SZCR251100526103 Page: 2 of 34 Revision Record Version Description Date Remark 01 2026-01-04 Original Authorized for issue by: Edison Li/Project Engineer Eric Fu / Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/2 Report No.: SZCR251100526103 Page: 3 of 34 TEST S UMMARY Frequency Band Maximum Reported SAR(W/kg) Body 5mm WI-FI (2.4GHz) 1.37 SAR Limited(W/kg) 1.6 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/2 Report No.: SZCR251100526103 Page: 4 of 34 Contents 1 General Information .......................................................................................................... 6 1.1 General Description of EUT ........................................................................................ 6 1.2 Test Specification ......................................................................................................... 7 1.3 RF exposure limits........................................................................................................ 8 1.4 Test Location ................................................................................................................. 9 1.5 Test Engineer ................................................................................................................ 9 1.6 Test Facility ................................................................................................................... 9 2 Laboratory Environment ............................................................................................... 10 3 SAR Measurements System Configuraion ............................................................... 11 3.1 The SAR Measurement System .............................................................................. 11 3.2 Isotropic E-field Proble EX3DV4 .............................................................................. 13 3.3 Data Acquisition Electronics (DAE) ......................................................................... 14 3.4 SAM Twin Phantom ................................................................................................... 14 3.5 ELI Phantom................................................................................................................ 15 3.6 Device Holder for Transmitters ................................................................................ 16 3.7 Measurement Procedure ........................................................................................... 17 3.7.1 Scanning procedure ..................................................................................... 17 3.7.2 Data storage .................................................................................................. 19 3.7.3 Data Evaluation by SEMCAD ..................................................................... 19 4 SAR measurement variability and uncertainty ....................................................... 21 4.1 SAR measurement variability ................................................................................... 21 4.2 SAR measurement uncertainty ................................................................................ 21 5 Desciption of Test Position .......................................................................................... 22 5.1 Generic device ............................................................................................................ 22 6 SAR System Verificaion Procedure ........................................................................... 23 6.1 Tissue Simulate Liquid .............................................................................................. 23 6.1.1 Recipes for Tissue Simulate Liquid ........................................................... 23 6.1.2 Measurement for Tissue Simulate Liquid ................................................. 24 6.2 SAR System Check.................................................................................................... 25 6.2.1 Justification for Extended SAR Dipole Calibrations ................................ 26 6.2.2 Summary System Check Result(s)............................................................ 27 6.2.3 Detailed System Check Results ................................................................. 27 7 Test Configuration .......................................................................................................... 28 7.1 Operation Configurations .......................................................................................... 28 7.1.1 WIFI Test Configuration .............................................................................. 28 8 Test Result ........................................................................................................................ 29 SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01 Rev. A/2 Report No.: SZCR251100526103 Page: 5 of 34 8.1 D…

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` SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZOA2512000240AT01 Rev.:01 Page: 1 of 17 Report Template No./Rev: SZWI-TRF-OA006/ v02 ANTENNA PASSIVE TEST REPORT Application No.SZOA2512000240AT ApplicantSophintech Manufacturing Co., Ltd. ManufacturerSophintech Manufacturing Co., Ltd. Product NameMini ET Device 2.4G WIFI Model No.MET2501 StandardsANSI/IEEE Std 149-2021 Date Initial Sample(s) ReceivedDec. 29, 2025 Testing Start DateDec. 29, 2025 Testing Finish DateDec. 30, 2025 Report Issue DateJan. 23, 2026 *In the configuration tested, the EUT detailed in this report complied with the standards specified above. Prepared by: Yuanyu Luo/ Test Engineer Approved by: Ervin Li/ Technical Manager ` SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZOA2512000240AT01 Rev.:01 Page: 2 of 17 Report Template No./Rev: SZWI-TRF-OA006/ v02 Revision History RevisionIssue DateDescription 01Jan. 23, 2026Initial creation of report ` SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZOA2512000240AT01 Rev.:01 Page: 3 of 17 Report Template No./Rev: SZWI-TRF-OA006/ v02 TABLE OF CONTENTS 1GENERAL INFORMATION....................................................................................................4 1.1Testing Laboratory..............................................................................................................................4 1.2Details of Applicant.............................................................................................................................4 1.3Details of Manufacturer......................................................................................................................4 1.4General Description of EUT..................................................................................................................5 1.5Test Procedure....................................................................................................................................5 1.6Test Specification................................................................................................................................6 1.7Laboratory Environment......................................................................................................................6 2OTA MEASUREMENTS SYSTEM CONFIGURATION......................................................7 2.1Test Configuration...............................................................................................................................7 3TEST EQUIPMENT LIST.......................................................................................................8 4MEASUREMENT UNCERTAINTY.......................................................................................9 5TEST RESULTS.....................................................................................................................10 6PATTERN PLOTS.................................................................................................................11 6.1Return Loss........................................................................................................................................11 6.2VSWR................................................................................................................................................12 6.3Stimulus............................................................................................................................................13 72-D ANTENNA PATTERN..................................................................................................14 83-D ANTENNA PATTERN..................................................................................................15 9THE EUT AND TEST CONFIGURATION.........................................................................16 ` SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZOA2512000240AT01 Rev.:01 Page: 4 of 17 Report Template No./Rev: SZWI-TRF-OA006/ v02 1General Information 1.1Testing Laboratory Test Lab SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Address No. 1 Workshop, M-10, Middle section, Science & Technology Park, Nanshan District, Shenzhen, Guangdong, China 518057 ContactErvin Li Tel.+86 18823369694 Fax+86 755-25328600 [email protected] 1.2Details of Applicant Applicant’s Name Sophintech Manufacturing Co., Ltd. Applicant’s Address Room 303, Floor 3, Plant 1, No. 13 Fuwan Road, Qianwu Town, Doumen District, Zhuhai City, 519170, Guangdong Province, China Contact Orchid Ma Tel. +86 13714439148 Fax N/A E-mail N/A 1.3Details of Manufacturer Manufacturer’s Name Sophintech Manufacturing Co., Ltd. Manufacturer’s Address Room 303, Floor 3, Plant 1, No. 13 Fuwan Road, Qianwu Town, Doumen District, Zhuhai City, 519170, Guangdong Province, China Contact Orchid Ma Tel. +86 13714439148 Fax N/A E-mail N/A ` SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZOA2512000240AT01 Rev.:01 Page: 5 of 17 Report Template No./Rev: SZWI-TRF-OA006/ v02 1.4General Description of EUT Device Description: Mini ET Device 2.4G WIFI Device Manufacturer: Sophintech Manufacturing Co., Ltd. Device Model: MET2501 Hardware Version: N/A Software Version: N/A Antenna Type: PCB Antenna Antenna Dimension: 13.2mm * 5.9mm * 0.5mm 1.5Test Procedure Testing is performed according to the ANSI/IEEE Std 149-2021. ` SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZOA2512000240AT01 Rev.:01 Page: 6 of 17 Report Template No./Rev: SZWI-TRF-OA006/ v02 1.6Test Specification IdentityDocument Title ANSI/IEEE Std 149-2021IEEE Standard Test Procedures for Antennas 1.7Laboratory Environment Temperature Min. =19°C，Max. = 25°C Relative humidity Min. =40%，Max. =72% Shield effect0.7-6GHz> 100dB Ground resistance <0.5 ` SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch Report No.: SZOA2512000240AT01 Rev.:01 Page: 7 of 17 Report Template No.…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100526102 Page: 1 of 93 Keny Xu EMC Laboratory Manager TEST REPORT Application No.:SZCR2511005261AT Applicant:Sophintech Manufacturing Co., Ltd. Address of Applicant:Room 303, Floor 3, Plant 1, No.13 Fuwan Road, Qianwu Town, Doumen District, Zhuhai City, Guangdong Province, 519170 China Manufacturer:Sophintech Manufacturing Co., Ltd. Address of Manufacturer:Room 303, Floor 3, Plant 1, No. 13 Fuwan Road, Qianwu Town, Doumen District, Zhuhai City, 519170, Guangdong Province, China Factory:Sophintech Manufacturing Co., Ltd. Address of Factory:Room 303, Floor 3, Plant 1, No. 13 Fuwan Road, Qianwu Town, Doumen District, Zhuhai City, 519170, Guangdong Province, China Equipment Under Test (EUT): EUT Name:Mini ET Device 2.4G WIFI Model No.:MET2501 FCC ID:2BDLL-MET2501 Standard(s) : 47 CFR Part 15, Subpart C 15.247 Date of Receipt: 2025-11-28 Date of Test: 2025-12-12 to 2025-12-22 Date of Issue: 2025-12-23 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100526102 Page: 2 of 93 Revision Record VersionChapterDateModifierRemark 012025-12-23Original Authorized for issue by: Edison Li/Project Engineer Eric Fu/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100526102 Page: 3 of 93 2 Test Summary Radio Spectrum Technical Requirement ItemStandardMethodRequirementResult Antenna Requirement 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.203 & 15.247(b)(4) Pass Radio Spectrum Matter Part ItemStandardMethodRequirementResult Conducted Emissions at AC Power Line (150kHz-30MHz) 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2020) Section 6.2 47 CFR Part 15, Subpart C 15.207 Pass Radiated Emissions which fall in the restricted bands ANSI C63.10 (2020) Section 6.10.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Below 1GHz ANSI C63.10 (2020) Section 6.4,6.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Above 1GHz ANSI C63.10 (2020) Section 6.6 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Conducted Peak Output Power ANSI C63.10 (2020) Section 11.9.2 47 CFR Part 15, Subpart C 15.247(b)(3) Pass Minimum 6dB Bandwidth ANSI C63.10 (2020) Section 11.8.1 47 CFR Part 15, Subpart C 15.247a(2) Pass Power Spectrum Density ANSI C63.10 (2020) Section 11.10.2 47 CFR Part 15, Subpart C 15.247(e) Pass Conducted Band Edges Measurement ANSI C63.10 (2020) Section 6.10.4 47 CFR Part 15, Subpart C 15.247(d) Pass Conducted Spurious Emissions ANSI C63.10 (2020) Section 11.11 47 CFR Part 15, Subpart C 15.247(d) Pass SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR251100526102 Page: 4 of 93 3Contents Page 1 Cover Page................................................................................................................................................1 2 Test Summary...........................................................................................................................................3 3 Contents ....................................................................................................................................................4 4 General Information..................................................................................................................................6 4.1 Details of E.U.T..................................................................................................................................6 4.2 Description of Support Units ..............................................................................................................6 4.3 Measurement Uncertainty..................................................................................................................6 4.4 Test Location......................................................................................................................................7 4.5 Test Facility ........................................................................................................................................7 4.6 Deviation from Standards...................................................................................................................7 4.7 Abnormalities from Standard Conditions ...........................................................................................7 5 Equipment List..........................................................................................................................................8 6 Radio Spectrum Technical Requirement .............................................................................................10 6.1 Antenna Requirement ......................................................................................................................10 6.1.1 Test Requirement: .......................................................................................................................10 6.1.2 Conclusion ...................................................................................................................................10 7 Radio Spectrum Matter Test Results....................................................................................................11 7.1 Conducted Emissions at AC Power Line (150kHz-30MHz).............................................................11 7.1.1 E.U.T. Operation..........................................................................................................................11 7.1.2 Test Mode Description.................................................................................................................11 7.1.3 Test Setup Diagram............................................................................…

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SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01-A03 Rev. A/0 Aug 16,2024 Report No.: SZCR251100526103 Page: 1 of 2 Appendix A Detailed System Check Results 1. System Performance Check System Performance Check 2450 MHz Head Date: 2025/12/31 Test Laboratory: SGS-SAR Lab Sys tem P erfor man ce C heck 2450MHz H ead DUT: D2450V2; Type: Dipole; Serial: 733 Communication System: UID 0, CW; Frequency: 2450 MHz;Duty Cycle: 1:1 Medium: HSL;Medium parameters used: f = 2450 MHz; σ = 1.796 S/m; ε r = 38.481; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY 5 Configuration: Probe: EX3DV4 - SN3789; ConvF(6.98, 6.98, 6.98); Calibrated: 2025/1/15 Sensor-Surface: 1.4mm (Mechanical Surface Detection) Electronics: DAE4 Sn1663; Calibrated: 2025/4/27 Phantom: SAM 3; Type: SAM Twin; Serial: 2031 DASY52 52.10.4(1527); SEMCAD X 14.6.14(7483) Configuration/d=10mm, Pin=250mW/Area Scan (6x9x1): Measurement grid: dx=12mm, dy=12mm Maximum value of SAR (measured) = 19.4 W/kg Configuration/d=10mm, Pin=250mW/Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 82.55 V/m; Power Drift = -0.03 dB Peak SAR (extrapolated) = 24.7 W/kg SAR(1 g) = 12.3 W/kg; SAR(10 g) = 5.84 W/kg Smallest distance from peaks to all points 3 dB below = 8.5 mm Ratio of SAR at M2 to SAR at M1 = 51.1% Maximum value of SAR (measured) = 20.2 W/kg 0 dB = 20.2 W/kg = 13.05 dBW/kg - End of the Appendix -

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01-A04 Rev. A/0 Aug 16,2024 Report No.: SZCR251100526103 Page: 1 of 2 Appendix B Detailed Test Results 1. WIFI WIFI 2.4G Date: 2025/12/31 Test Laboratory: SGS-SAR Lab MET2501 WIFI 2.4G 802.11b 6C H B ac k s ide 5m m DUT: MET2501 Communication System: UID 0, WI-FI(2.4GHz) (0); Frequency: 2437 MHz;Duty Cycle: 1:1.001 Medium: HSL;Medium parameters used: f = 2437 MHz; σ = 1.787 S/m; ε r = 38.512; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY 5 Configuration: Probe: EX3DV4 - SN3789; ConvF(6.98, 6.98, 6.98); Calibrated: 2025/1/15 Sensor-Surface: 1.4mm (Mechanical Surface Detection) Electronics: DAE4 Sn1663; Calibrated: 2025/4/27 Phantom: SAM 3; Type: SAM Twin; Serial: 2031 DASY52 52.10.4(1527); SEMCAD X 14.6.14(7483) Configuration/Scan/Area Scan (7x9x1): Measurement grid: dx=12mm, dy=12mm Maximum value of SAR (measured) = 1.24 W/kg Configuration/Scan/Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Reference Value = 8.874 V/m; Power Drift = 0.06 dB Peak SAR (extrapolated) = 2.23 W/kg SAR(1 g) = 1.15 W/kg; SAR(10 g) = 0.560 W/kg Smallest distance from peaks to all points 3 dB below = 8.9 mm Ratio of SAR at M2 to SAR at M1 = 54.6% Maximum value of SAR (measured) = 1.49 W/kg 0 dB = 1.49 W/kg = 1.73 dBW/kg - End of the Appendix -

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZSAR-TRF-01-A01 Rev. A/1 Aug 16,2024 Report No.: SZCR251100526103 Page: 1 of 19 Appendix C Calibration certificate 1. Dipole D2450V2-SN 733 2. DAE DAE4-SN 1663 3. Probe EX3DV4-SN 3789 - End of the Appendix -