2BOHY-621U1WIFI/BT Module+5G

V0.2-Mar.2025 TR6S621U1datasheet SPECIFICATION TR6S621U1 IfonereceivesthisdocumentfromTrulyElectronicsCo.,Ltd.(hereinafterreferredtoas"TrulyElectronics"),itindicatesthatonehasagreed tothefollowingterms.Ifonedoesnotconsenttothefollowingterms,pleaseceasetheuseofthisdocument. ThecopyrightofthisdocumentisownedbyTrulyElectronicsCo.,Ltd.,andanyrightsnotexplicitlygrantedhereinarereserved.This documentinvolvestheproprietaryinformationofTrulyElectronics.WithoutthepriorwrittenpermissionofTrulyElectronics,noentityor individualmayduplicate,disseminate,distribute,utilizeordisclosethisdocument,aswellasanypictures,tables,dataandother informationcontainedtherein. Thisproductconformstothedesignrequirementsregardingenvironmentalprotectionandpersonalsafety.Thestorage,useanddisposal oftheproductshouldcomplywiththerequirementsstipulatedintheproductmanual,relevantcontractsorrelevantnationallawsand regulations. Thecompanyreservestherighttomodifyandimprovetheproductsdescribedinthismanualwithoutpriornotification;meanwhile,it reservestherighttoreviseorwithdrawthismanualatanytime. Ifthereisanyambiguityorobscurityinthetextofthisusermanual,pleaseconsultthecompanyorthedistributorpromptly. Address:NorthOfTheDongChongRoad,TrulyIndustrialArea,ShanweiCity,GuangdongProvince,China. Website:https://www.truly.com.hk TRULY TRULY TRULY TRULY TRULY TRULY TRULY TRULY TRULY TRULY WIFI/BT Module+5G V0.2-Mar.2025 Page 2 of18 TR6S621U1datasheet Contents 1.DeviceOverview...........................................................................................................................................3 1.1Descriptions...........................................................................................................................................3 1.2Features.................................................................................................................................................3 1.2.1GeneralFeatures............................................................................................................................3 1.2.2Wi-FiKeyFeatures.........................................................................................................................3 1.2.3BluetoothKeyFeatures..................................................................................................................4 1.3FunctionalBlockDiagram......................................................................................................................5 2.PinConfigurationandFunctions..................................................................................................................5 2.1ModulePinDiagram...............................................................................................................................5 2.2PinFunctions.........................................................................................................................................6 3.Specifications...............................................................................................................................................7 3.1WIFIRFSpecifications..........................................................................................................................7 3.2BluetoothRFSpecifications...................................................................................................................9 4.ApplicationandImplementation.................................................................................................................10 4.1ApplicationDiagram.............................................................................................................................10 4.2Referencedesign.................................................................................................................................10 4.3Poweron/offTiming..........................................................................................................................10 5.MechanicalandPackage...........................................................................................................................15 5.1MechanicalSize...................................................................................................................................15 5.2RecommendedLandPattern...............................................................................................................15 5.3PackageInformation............................................................................................................................16 6.ThermalReflow..........................................................................................................................................17 7.OrderingInformation..................................................................................................................................18 8.RevisionHistory..........................................................................................................................................18 TRULY TRULY TRULY TRULY TRULY TRULY TRULY TRULY TRULY TRULY V0.2-Mar.2025 Page 3 of18 TR6S621U1datasheet 1.DeviceOverview 1.1Descriptions TheTR6S621U1isahighlyintegratedmodulethatsupports1T1R802.11a/b/g/n/ac/axwithWirelessLAN (WLAN)USB2.0interfacecontrollerandBluetooth5.4HS-UARTinterfacecontroller.Thehighspeed FFT/IFFTpaths,combinedwithBPSK,QPSK,16QAM,64QAM、256QAMandupto1024QAMmodulationof theindividualsubcarriers,andcompatiblecodingrateof1/2,2/3,3/4,5/6,provideupto600.5MbpsforIEEE 802.11ax.TheTR6S621U1MACsupports802.11eformultimediaapplications,802.11iandWAPIfor security.TheTR6S621U1providesacompletesolutionforahigh-performanceintegratedwirelessand Bluetoothdevice.ItsuitableforSTB,TVs,tablets,phones,IPCandotherfieldssuchasconsumerelectronic devices,andcanalsobeappliedtothefieldswithhighreliabilityrequirements,suchasindustrial interconnection. TheTR6A621U1providesacompletesolutionforahigh-performanceintegratedwirelessandBluetooth device. 1.2Features 1.2.1General…

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Label Size:8*2mm Label attached to the shielding cover FCC ID: 2BOHY-621U1 .

Page 1 of 2 FCC ID: 2BOHY-621U1 Setup photo AC Conduction RF Conduction Page 2 of 2 FCC ID: 2BOHY-621U1 RE (Below 1GHz) RE (Above 1GHz)

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Radio Test Report Report No.:STS2601230W08 Issued for TRULY ELECTRONICS MFG., LTD Truly industry city, shanwei guangdong, P.R.C Product Name: WIFI/BT Module+5G Brand Name: N/A Model Name: TR6S621U1 Series Model(s): TR6S521U1, TR6S521U1-C, TR6S521U1-T, TR6S621U1-C, TR6S621U2-C, TR6S621U-T, TR6S621U2-T FCC ID: 2BOHY-621U1 Test Standards: FCC Part15.247 Page 2 of 69 Report No.: STS2601230W08 TEST REPORT Applicant’s Name ..................: TRULY ELECTRONICS MFG., LTD Address ..................................: Truly industry city, shanwei guangdong, P.R.C Manufacturer's Name ...........: TRULY ELECTRONICS MFG., LTD Address ..................................: Truly industry city, shanwei guangdong, P.R.C Product Description Product Name .........................: WIFI/BT Module+5G Brand Name ...........................: N/A Model Name ...........................:... : TR6S621U1 Series Model(s) .....................: TR6S521U1, TR6S521U1-C, TR6S521U1-T, TR6S621U1-C, TR6S621U2-C, TR6S621U-T, TR6S621U2-T Test Standards ......................: FCC Part15.247 Test Procedure .......................: ANSI C63.10-2020 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the IC requirements. And it is applicable only to the tested sample identified in the report. The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Date of Test ............................................ : Date of receipt of test item ...................... : 21 Jan. 2026 Date (s) of performance of tests ............. : 21 Jan. 2026 ~ 09 Mar. 2026 Date of Issue ........................................... : 09 Mar. 2026 Test Result ............................................... : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 69 Report No.: STS2601230W08 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 9 2.3 TEST SOFTWARE AND POWER LEVEL 10 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 10 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 11 2.6 EQUIPMENTS LIST 12 3. EMC EMISSION TEST 13 3.1 CONDUCTED EMISSION MEASUREMENT 13 3.2 TEST PROCEDURE 14 3.3 TEST SETUP 14 3.4 EUT OPERATING CONDITIONS 14 3.5 TEST RESULTS 15 4. RADIATED EMISSION MEASUREMENT 17 4.1 RADIATED EMISSION LIMITS 17 4.2 TEST PROCEDURE 19 4.3 TEST SETUP 20 4.4 EUT OPERATING CONDITIONS 20 4.5 FIELD STRENGTH CALCULATION 21 4.6 TEST RESULTS 22 5. DUTY CYCLE 35 5.1 TEST STANDARD 35 5.2 TEST PROCEDURE 35 5.3 DEVIATION FROM STANDARD 35 5.4 TEST SETUP 35 5.6 TEST RESULTS 35 6. CONDUCTED SPURIOUS & BAND EDGE EMISSION 36 6.1 LIMIT 36 6.2 TEST PROCEDURE 36 6.3 TEST SETUP 36 Page 4 of 69 Report No.: STS2601230W08 Table of Contents Page 6.4 EUT OPERATION CONDITIONS 36 6.5 TEST RESULTS 36 7. POWER SPECTRAL DENSITY TEST 37 7.1 LIMIT 37 7.2 TEST PROCEDURE 37 7.3 TEST SETUP 37 7.4 EUT OPERATION CONDITIONS 37 7.5 TEST RESULTS 37 8. BANDWIDTH TEST 38 8.1 LIMIT 38 8.2 TEST PROCEDURE 38 8.3 TEST SETUP 38 8.4 EUT OPERATION CONDITIONS 38 8.5 TEST RESULTS 38 9. PEAK OUTPUT POWER TEST 39 9.1 LIMIT 39 9.2 TEST PROCEDURE 39 9.3 TEST SETUP 39 9.4 EUT OPERATION CONDITIONS 39 9.5 TEST RESULTS 39 10. ANTENNA REQUIREMENT 40 10.1 STANDARD REQUIREMENT 40 10.2 EUT ANTENNA 40 APPENDIX 1-TEST DATA 41 DUTY CYCLE 41 MAXIMUM PEAK CONDUCTED OUTPUT POWER 45 -6DB BANDWIDTH 49 MAXIMUM POWER SPECTRAL DENSITY LEVEL 53 BAND EDGE 57 CONDUCTED RF SPURIOUS EMISSION 62 APPENDIX 2- EUT TEST PHOTO 69 Page 5 of 69 Report No.: STS2601230W08 Revision History Rev. Issue Date Report No. Effect Page Contents 00 09 Mar. 2026 STS2601230W08 ALL Initial Issue Page 6 of 69 Report No.: STS2601230W08 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/ Part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- Note: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2020. Page 7 of 69 Report No.: STS2601230W08 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.751dB 2 Unwanted Emissions, conducted ±2.888dB 3 All emissions, radiated 9K-30MHz ±2.48dB 4 All emissions, radiated 30M-1GHz ±2.52dB 5 All emissions, radiated 1G-18GHz ±3.48dB 6 All emissions, radiated>18GHz ±4.18dB 7 Conducted Emission (9KHz-150KHz) ±2.48dB 8 Conducted Emission (150KHz-30MHz) ±2.52dB 9 Occupied Channel Bandwidth ±3.6% 10 Power Spectral Density, conducted ±1.214dB 11 Duty Cycle ±3.2% Page 8 of 69 Report No.: STS2601230W08 2. GENERAL INFORMATION 2.1 GENE…

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Page 56 of 109 Report No.: STS2601230W07 -6dB Bandwidth NVNT ax40 2437MHz -6dB Bandwidth NVNT ax40 2452MHz Page 57 of 109 Report No.: STS2601230W07 Occupied Channel Bandwidth Condition Mode Frequency (MHz) 99% OBW (MHz) NVNT b 2412 12.061 NVNT b 2437 12.09 NVNT b 2462 12.096 NVNT g 2412 16.686 NVNT g 2437 16.677 NVNT g 2462 16.682 NVNT n20 2412 17.816 NVNT n20 2437 17.844 NVNT n20 2462 17.854 NVNT n40 2422 36.421 NVNT n40 2437 36.396 NVNT n40 2452 36.32 NVNT ax20 2412 19.043 NVNT ax20 2437 19.014 NVNT ax20 2462 19.072 NVNT ax40 2422 37.949 NVNT ax40 2437 37.863 NVNT ax40 2452 37.902 Page 58 of 109 Report No.: STS2601230W07 Test Graphs OBW NVNT b 2412MHz OBW NVNT b 2437MHz Page 59 of 109 Report No.: STS2601230W07 OBW NVNT b 2462MHz OBW NVNT g 2412MHz Page 60 of 109 Report No.: STS2601230W07 OBW NVNT g 2437MHz OBW NVNT g 2462MHz Page 61 of 109 Report No.: STS2601230W07 OBW NVNT n20 2412MHz OBW NVNT n20 2437MHz Page 62 of 109 Report No.: STS2601230W07 OBW NVNT n20 2462MHz OBW NVNT n40 2422MHz Page 63 of 109 Report No.: STS2601230W07 OBW NVNT n40 2437MHz OBW NVNT n40 2452MHz Page 64 of 109 Report No.: STS2601230W07 OBW NVNT ax20 2412MHz OBW NVNT ax20 2437MHz Page 65 of 109 Report No.: STS2601230W07 OBW NVNT ax20 2462MHz OBW NVNT ax40 2422MHz Page 66 of 109 Report No.: STS2601230W07 OBW NVNT ax40 2437MHz OBW NVNT ax40 2452MHz Page 67 of 109 Report No.: STS2601230W07 Maximum Power Spectral Density Level Condition Mode Frequency (MHz) PSD (dBm/3kHz) Limit (dBm/3kHz) Verdict NVNT b 2412 -9.18 <=8 Pass NVNT b 2437 -10.31 <=8 Pass NVNT b 2462 -10.88 <=8 Pass NVNT g 2412 -11.23 <=8 Pass NVNT g 2437 -11.85 <=8 Pass NVNT g 2462 -11.18 <=8 Pass NVNT n20 2412 -11.39 <=8 Pass NVNT n20 2437 -11.47 <=8 Pass NVNT n20 2462 -12 <=8 Pass NVNT n40 2422 -15.61 <=8 Pass NVNT n40 2437 -15.6 <=8 Pass NVNT n40 2452 -16.28 <=8 Pass NVNT ax20 2412 -12.35 <=8 Pass NVNT ax20 2437 -12.31 <=8 Pass NVNT ax20 2462 -12.75 <=8 Pass NVNT ax40 2422 -15.72 <=8 Pass NVNT ax40 2437 -15.15 <=8 Pass NVNT ax40 2452 -15.07 <=8 Pass Page 68 of 109 Report No.: STS2601230W07 Test Graphs PSD NVNT b 2412MHz PSD NVNT b 2437MHz Page 69 of 109 Report No.: STS2601230W07 PSD NVNT b 2462MHz PSD NVNT g 2412MHz Page 70 of 109 Report No.: STS2601230W07 PSD NVNT g 2437MHz PSD NVNT g 2462MHz Page 71 of 109 Report No.: STS2601230W07 PSD NVNT n20 2412MHz PSD NVNT n20 2437MHz Page 72 of 109 Report No.: STS2601230W07 PSD NVNT n20 2462MHz PSD NVNT n40 2422MHz Page 73 of 109 Report No.: STS2601230W07 PSD NVNT n40 2437MHz PSD NVNT n40 2452MHz Page 74 of 109 Report No.: STS2601230W07 PSD NVNT ax20 2412MHz PSD NVNT ax20 2437MHz Page 75 of 109 Report No.: STS2601230W07 PSD NVNT ax20 2462MHz PSD NVNT ax40 2422MHz Page 76 of 109 Report No.: STS2601230W07 PSD NVNT ax40 2437MHz PSD NVNT ax40 2452MHz Page 77 of 109 Report No.: STS2601230W07 Band Edge Condition Mode Frequency (MHz) Max Value (dBc) Limit (dBc) Verdict NVNT b 2412 -49.58 <=-20 Pass NVNT b 2462 -55.6 <=-20 Pass NVNT g 2412 -42.93 <=-20 Pass NVNT g 2462 -46.67 <=-20 Pass NVNT n20 2412 -40.23 <=-20 Pass NVNT n20 2462 -46.69 <=-20 Pass NVNT n40 2422 -39.28 <=-20 Pass NVNT n40 2452 -43.44 <=-20 Pass NVNT ax20 2412 -41.53 <=-20 Pass NVNT ax20 2462 -47.93 <=-20 Pass NVNT ax40 2422 -41.37 <=-20 Pass NVNT ax40 2452 -43.83 <=-20 Pass Page 78 of 109 Report No.: STS2601230W07 Test Graphs Band Edge NVNT b 2412MHz Ref Band Edge NVNT b 2412MHz Emission Page 79 of 109 Report No.: STS2601230W07 Band Edge NVNT b 2462MHz Ref Band Edge NVNT b 2462MHz Emission Page 80 of 109 Report No.: STS2601230W07 Band Edge NVNT g 2412MHz Ref Band Edge NVNT g 2412MHz Emission Page 81 of 109 Report No.: STS2601230W07 Band Edge NVNT g 2462MHz Ref Band Edge NVNT g 2462MHz Emission Page 82 of 109 Report No.: STS2601230W07 Band Edge NVNT n20 2412MHz Ref Band Edge NVNT n20 2412MHz Emission Page 83 of 109 Report No.: STS2601230W07 Band Edge NVNT n20 2462MHz Ref Band Edge NVNT n20 2462MHz Emission Page 84 of 109 Report No.: STS2601230W07 Band Edge NVNT n40 2422MHz Ref Band Edge NVNT n40 2422MHz Emission Page 85 of 109 Report No.: STS2601230W07 Band Edge NVNT n40 2452MHz Ref Band Edge NVNT n40 2452MHz Emission Page 86 of 109 Report No.: STS2601230W07 Band Edge NVNT ax20 2412MHz Ref Band Edge NVNT ax20 2412MHz Emission Page 87 of 109 Report No.: STS2601230W07 Band Edge NVNT ax20 2462MHz Ref Band Edge NVNT ax20 2462MHz Emission Page 88 of 109 Report No.: STS2601230W07 Band Edge NVNT ax40 2422MHz Ref Band Edge NVNT ax40 2422MHz Emission Page 89 of 109 Report No.: STS2601230W07 Band Edge NVNT ax40 2452MHz Ref Band Edge NVNT ax40 2452MHz Emission Page 90 of 109 Report No.: STS2601230W07 Conducted RF Spurious Emission Condition Mode Frequency (MHz) Max Value (dBc) Limit (dBc) Verdict NVNT b 2412 -43.91 <=-20 Pass NVNT b 2437 -44.24 <=-20 Pass NVNT b 2462 -42.76 <=-20 Pass NVNT g 2412 -41.77 <=-20 Pass NVNT g 2437 -40.6 <=-20 Pass NVNT g 2462 -40.81 <=-20 Pass NVNT n20 2412 -43.33 <=-20 Pass NVNT n20 2437 -42.83 <=-20 Pass NVNT n20 2462 -42.62 <=-20 Pass NVNT n40 2422 -40.6 <=-20 Pass NVNT n40 2437 -39.86 <=-20 Pass NVNT n40 2452 -39.45 <=-20 Pass NVNT ax20 2412 -43.44 <=-20 Pass NVNT ax20 2437 -41.87 <=-20 Pass NVNT ax20 2462 -42.78 <=-20 Pass NVNT ax40 2422 -39.51 <=-20 Pass NVNT ax40 2437 -39.59 <=-20 Pass NVNT ax40 2452 -38.97 <=-20 Pass Page 91 of 109 Report No.: STS2601230W07 Test Graphs Tx. Spurious NVNT b 2412MHz Ref Tx. Spurious NVNT b 2412MHz Emission Page 92 of 109 Report No.: STS2601230W07 Tx. Spurious NVNT b 2437MHz Ref Tx. Spurious NVNT b 2437MHz Emission Page 93 of 109 Report No.: STS2601230W07 Tx. Spurious NVNT b 2462MHz Ref Tx. Spurious NVNT b 2462MHz Emission Page 94 of 109 Report No.: STS2601230W07 Tx. Spurious NVNT g 2412MHz Ref Tx. Spurious NVNT g 2412MHz Emission Page 95 of 109 Report No.: STS2601230W07 Tx. Spurious NVNT g 2437MHz Ref Tx. Spurious NVNT g 2437MHz Emission Page 96 of 109 Report No.: STS2601230W07 Tx. Spurious NVNT g 2462MHz Ref Tx. Spurious NVNT g 2462MHz Emission Page 97 of 109 Report No.: STS2601230W07 Tx. Spuri…

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The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Radio Test Report Report No.:STS2601230W07 Issued for TRULY ELECTRONICS MFG., LTD Truly industry city, shanwei guangdong, P.R.C Product Name: WIFI/BT Module+5G Brand Name: N/A Model Name: TR6S621U1 Series Model(s): TR6S521U1, TR6S521U1-C, TR6S521U1-T, TR6S621U1-C, TR6S621U2-C, TR6S621U-T, TR6S621U2-T FCC ID: 2BOHY-621U1 Test Standards: FCC Part15.247 Page 2 of 109 Report No.: STS2601230W07 TEST REPORT Applicant’s Name ................. : TRULY ELECTRONICS MFG., LTD Address .................................. : Truly industry city, shanwei guangdong, P.R.C Manufacturer's Name ........... : TRULY ELECTRONICS MFG., LTD Address .................................. : Truly industry city, shanwei guangdong, P.R.C Product Description Product Name ........................ : WIFI/BT Module+5G Brand Name ........................... : N/A Model Name ........................... : TR6S621U1 Series Model(s) .................... : TR6S521U1, TR6S521U1-C, TR6S521U1-T, TR6S621U1-C, TR6S621U2-C, TR6S621U-T, TR6S621U2-T Standards ............................. : FCC Part 15.247 Test Procedure........................: ANSI C63.10-2020 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Date of Test ............................................ : Date of receipt of test item ...................... : 21 Jan. 2026 Date (s) of performance of tests ............. : 21 Jan. 2026 ~ 10 Mar. 2026 Date of Issue .......................................... : 10 Mar. 2026 Test Result .............................................. : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 109 Report No.: STS2601230W07 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 TEST SOFTWARE AND POWER LEVEL 11 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 11 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 12 2.6 EQUIPMENTS LIST FOR ALL TEST ITEMS 13 3. EMC EMISSION TEST 14 3.1 CONDUCTED EMISSION MEASUREMENT 14 3.2 RADIATED EMISSION MEASUREMENT 18 4. DUTY CYCLE 30 4.1 TEST STANDARD 30 4.2 TEST PROCEDURE 30 4.3 DEVIATION FROM STANDARD 30 4.4 TEST SETUP 30 4.6 TEST RESULTS 30 5. CONDUCTED SPURIOUS & BAND EDGE EMISSION 31 5.1 LIMIT 31 5.2 TEST PROCEDURE 31 5.3 DEVIATION FROM STANDARD 31 5.4 TEST SETUP 31 5.5 EUT OPERATION CONDITIONS 31 5.6 TEST RESULTS 31 6. POWER SPECTRAL DENSITY TEST 32 6.1 LIMIT 32 6.2 TEST PROCEDURE 32 6.3 DEVIATION FROM STANDARD 32 6.4 TEST SETUP 32 6.5 EUT OPERATION CONDITIONS 32 6.6 TEST RESULTS 32 Page 4 of 109 Report No.: STS2601230W07 Table of Contents Page 7. BANDWIDTH TEST 33 7.1 LIMIT 33 7.2 TEST PROCEDURE 33 7.3 DEVIATION FROM STANDARD 33 7.4 TEST SETUP 33 7.5 EUT OPERATION CONDITIONS 33 7.6 TEST RESULTS 33 8. PEAK OUTPUT POWER TEST 34 7.1 LIMIT 34 8.2 TEST PROCEDURE 34 8.3 DEVIATION FROM STANDARD 34 8.4 TEST SETUP 34 8.5 EUT OPERATION CONDITIONS 34 8.6 TEST RESULTS 34 9. ANTENNA REQUIREMENT 35 9.1 STANDARD REQUIREMENT 35 9.2 EUT ANTENNA 35 APPENDIX 1-TEST DATA 36 DUTY CYCLE 36 MAXIMUM PEAK CONDUCTED OUTPUT POWER 46 -6DB BANDWIDTH 47 OCCUPIED CHANNEL BANDWIDTH 57 MAXIMUM POWER SPECTRAL DENSITY LEVEL 67 BAND EDGE 77 CONDUCTED RF SPURIOUS EMISSION 90 Page 5 of 109 Report No.: STS2601230W07 Revision History Rev. Issue Date Report No. Effect Page Contents 00 10 Mar. 2026 STS2601230W07 ALL Initial Issue Page 6 of 109 Report No.: STS2601230W07 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted Band Edge Emission PASS -- Part 15.247(d)/ part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2020. Page 7 of 109 Report No.: STS2601230W07 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ±U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.751dB 2 Unwanted Emissions, conducted ±2.888dB 3 All emissions, radiated 9K-30MHz ±2.48dB 4 All emissions, radiated 30M-1GHz ±2.52dB 5 All emissions, radiated 1G-18GHz ±3.48dB 6 All emissions, radiated>18GHz ±4.18dB 7 Conducted Emission (9KHz-150KHz) ±2.48dB 8 Conducted Emission (150KHz-30MHz) ±2.52dB 9 Occupied Channel Bandwidth ±3.6% 10 Power Spectral Density, conducted ±1.214dB 11 Duty Cycle ±3.2% Page 8 of 109 Report No.: STS2601230W07 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name WIFI/BT Module+5G Brand Name N/A Model Name TR6S621U1 Serie…

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540054505500555056005650 0.391.281.932.501.930.95 49.1053.8051.6052.6053.4050.00 2.50

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. MPE Report Report No.:STS2601230H02 Issued for TRULY ELECTRONICS MFG., LTD Truly industry city, shanwei guangdong, P.R.C Product Name: WIFI/BT Module+5G Brand Name: N/A Model Name: TR6S621U1 Series Model(s): TR6S521U1, TR6S521U1-C, TR6S521U1-T, TR6S621U1-C, TR6S621U2-C, TR6S621U-T, TR6S621U2-T FCC ID: 2BOHY-621U1 Test Standard: FCC 47CFR §2.1091 Page 2 of 8 Report No.: STS2601230W07 TEST REPORT Applicant’s Name ................. : TRULY ELECTRONICS MFG., LTD Address .................................. : Truly industry city, shanwei guangdong, P.R.C Manufacturer's Name .......... : TRULY ELECTRONICS MFG., LTD Address .................................. : Truly industry city, shanwei guangdong, P.R.C Product Description Product Name ........................ : WIFI/BT Module+5G Brand Name ........................... : N/A Model Name........................... : TR6S621U1 Series Model(s) ...................... : TR6S521U1, TR6S521U1-C, TR6S521U1-T, TR6S621U1-C, TR6S621U2-C, TR6S621U-T, TR6S621U2-T Test Standards ..................... : FCC 47CFR §2.1091 447498 D01 Interim General RF Exposure Guidance v06 The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. Date of Test ............................................ : Date of receipt of test item ...................... : 21 Jan. 2026 Date (s) of performance of tests.............. : 21 Jan. 2026 ~ 10 Mar. 2026 Date of Issue ........................................... : 10 Mar. 2026 Test Result ............................................... : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 8 Report No.: STS2601230W07 TABLE OF CONTENTS 1. GENERAL INFORMATION 5 1.1 GENERAL DESCRIPTION OF THE EUT 5 1.2 TEST FACTORY 6 2. FCC 47CFR §2.1091 REQUIREMENT 7 2.1 TEST STANDARDS 7 2.2 LIMIT 7 2.3 TEST RESULT 8 Page 4 of 8 Report No.: STS2601230W07 Revision History Rev. Issue Date Report No. Effect Page Contents 00 10 Mar. 2026 STS2601230W07 ALL Initial Issue Page 5 of 8 Report No.: STS2601230W07 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name WIFI/BT Module+5G Brand Name N/A Model Name TR6S621U1 Series Model(s) TR6S521U1, TR6S521U1-C, TR6S521U1-T, TR6S621U1-C, TR6S621U2-C, TR6S621U-T, TR6S621U2-T Model Difference Only the model names are different Product Description The EUT is WIFI/BT Module+5G Operation Frequency: BT/BLE: 2402~2480 MHz 2.4G WLAN: 802.11b/g/n/ax 20: 2412~2462 MHz 802.11n/ax40:2422~2452MHz 5.2G RLAN: 802.11a/n/ac/ax (20MHz): 5180~5240MHz 802.11n /ac/ax(40MHz):5190~5230MHz 802.11ac/ax (80MHz):5210MHz 5.3G RLAN: 802.11a/n/ac/ax (20MHz): 5260~5320MHz 802.11n /ac/ax(40MHz):5270~5310MHz 802.11ac/ax (80MHz):5290MHz 5.6G RLAN: 802.11a/n/ac/ax (20MHz): 5500~5700MHz 802.11n /ac/ax(40MHz):5510~5670MHz 802.11ac/ax (80MHz):5530~5610MHz 5.8G RLAN: 802.11a/n/ac/ax (20MHz): 5745~5825MHz 802.11n /ac/ax(40MHz):5755~5795MHz 802.11ac/ax (80MHz):5775MHz Page 6 of 8 Report No.: STS2601230W07 Modulation Type: BT: BT BR(1Mbps): GFSK BT EDR(2Mbps): π/4-DQPSK BT EDR(3Mbps): 8DPSK BLE: GFSK 2.4G WLAN: 802.11b(DSSS):CCK,DQPSK,DBPSK 802.11g(OFDM):BPSK,QPSK,16-QAM, 64-QAM 802.11n(OFDM):BPSK,QPSK,16-QAM, 64-QAM 802.11ax(OFDM, OFDMA): BPSK,QPSK,16-QAM,64-QAM,256-QAM, 1024QAM 5G RLAN: 802.11a(OFDM):BPSK,QPSK,16-QAM, 64-QAM 802.11n(OFDM):BPSK,QPSK,16-QAM, 64-QAM 802.11ac(OFDM): BPSK,QPSK,16-QAM,64-QAM,256-QAM 802.11ax(OFDM, OFDMA): BPSK,QPSK,16-QAM,64-QAM,256-QAM, 1024QAM Antenna gain: 2.5dBi Antenna Designation: Dipole Power Rating Input: DC3.3V Adapter N/A Battery N/A Hardware Version N/A Software Version N/A 1.2 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 Page 7 of 8 Report No.: STS2601230W07 2. FCC 47CFR §2.1091 REQUIREMENT 2.1 TEST STANDARDS The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The gain of the antennas used in the product is extracted from the Antenna data sheets provided and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis Transmission formula is far field assumption, the calculated result of that is an over-prediction for near field power density. It is taken as worst case to specify the safety range. 2.2 LIMIT According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of the human exposure to radio-frequency (RF) radiation as specified in 1.1307 (b) Limits for Maximum Permissible Exposure (MPE) Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm²) Limits for Occupational / controlled Exposures 300 - 1500 -- -- F/300 3.0-30 1842/f 4.89/f *(900/f²) 1500 – 100000 -- -- 5.0 Limits for General population / Uncontrolled Exposure 300 - 1500 -- -- F/1500 1.34-30 824/f 2.19/f *(180f²) 1500 – 100000 -- -- 1.0 F= Frequency in MHz Friss Formula Friss Transmission Formula: Pd = (Pout * G) / (4*pi*r²) Where Pd = power density in mW/cm² Pout = outp…

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