2BSO7-SPAMW21XXMWireless Audio Module

SUNPLUS TECHNOLOGY CO. reserves the right to change this documentation without prior notice. Information provided by SUNPLUS TECHNOLOGY CO. is believed to be accurate and reliable. However, SUNPLUS TECHNOLOGY CO. makes no warranty for any errors which may appear in this document. Contact SUNPLUS TECHNOLOGY CO. to obtain the latest version of device specifications before placing your order. No responsibility is assumed by SUNPLUS TECHNOLOGY CO. for any infringement of patent or other rights of third parties which may result from its use. In addition, SUNPLUS products are not authorized for use as critical components in life support systems or aviation systems, where a malfunction or failure of the product may reasonably be expected to result in significant injury to the user, without the express written approval of Sunplus. SUNPLUS Technology Co., Ltd. www.sunplus.com No.19, Innovation 1st Road. Hsinchu Science Park 30076, Taiwan, ROC T: +886-3-5786005 F: +886-3-5786006 SPA-MW21xx-x Wireless Audio Module Datasheet Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun Sunplus confidential for Feitengyun SPA-MW21xx-M 1 Table of Content 1. Introductions ......................................................................................................................................2 2. Key Features .......................................................................................................................................3 3. Applications ........................................................................................................................................4 4. Module Pin Assignments ...................................................................................................................5 4.1 Module Package Outline ................................................................................................................5 SPA-MW21F3-M ................................................................................................................................................ 5 SPA-MW21F3-E ................................................................................................................................................ 7 4.2 Module PCB Pin Outline ................................................................................................................9 SPA MW21F3-M ................................................................................................................................................ 9 SPA- MW21F3-E ............................................................................................................................................. 10 4.3 Module Pin Type Definitions ......................................................................................................... 11 4.4 Tx Module Pinout Descriptions .................................................................................................... 11 4.5 Rx Module Pinout Descriptions ................................................................................................... 12 4.6 Soldering Specification ................................................................................................................ 13 5. Performance .................................................................................................................................... 15 5.1 Audio Specification (I2S to I2S), Fs=48KHz ............................................................................... 15 5.2 Audio Specification (I2S to I2S), Fs=96KHz ............................................................................... 15 5.3 Audio Specification (I2S to I2S), Fs=192KHz ............................................................................. 15 5.4 Channel Synchronization ............................................................................................................ 15 6. Electrical Characteristic ................................................................................................................. 16 6.1 Operation Condition .................................................................................................................... 16 6.2 Digital IO DC Characteristic ........................................................................................................ 16 6.3 WLAN 5G band RF Characteristic .............................................................................................. 16 6.4 BLE 2.4G band RF Characteristic ............................................................................................... 16 6.5 Power Consumption .................................................................................................................... 16 7. AC Characteristics .......................................................................................................................... 17 7.1 I2C Characteristics ...................................................................................................................... 17 7.2 I2S Characteristics ...................................................................................................................... 17 8. Module Part No. Description .......................................................................................................... 19 9. Version History ................................................................................................................................ 20 Add SPA-MW21M1-E information .................................…

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C5266091_X8_Ed.1 1/1 Letter of Authorization SUNPLUS TECHNOLOGY CO., LTD. Company: SUNPLUS TECHNOLOGY CO., LTD. Address: 19, Innovation First Road Hsinchu Science Park, Taiwan 30076 Product Name: Wireless Audio Module Model Number: SPA-MW21xx-M, SPA-MW21F3-M, SPA-MW21P2-M FCC Identifier: 2BSO7-SPAMW21XXM We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Lucky song Date: 2025.11.19 Title: Manager Signature of applicant:

Shenzhen DL Testing Technology Co., Ltd. EUT TEST PHOTO Radiated Measurement Photos Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

Antenna Test Report apply for IR02 Test Date: 2025/09/11 Issue Date: 2025/12/24 Shenzhen Phaten Technology CO.,Ltd. 401, Building 1, No. 200 Kejie 2nd Road, Shutianpu Community, Matian Street, Guangming District, Shenzhen，Guangdong 1.Antenna Description 1.1 Antenna List Antenna Name Brand Model 2D Peak Gain(dBi) Antenna Type 2400- 2483.5MHz 5150- 5250MHz 5250- 5350MHz 5470- 5725MHz 5725- 5850MHz WLAN ANT1 FOXCONN IR02 -2.353.26 3.26 3.29 3.29 Printing WLAN/BT ANT2 FOXCONN IR02 1.49 2.03 2.03 1.14 1.87 Printing Note: Gain is included Cable Loss 2GHz=0.2dB 5GHz=0.4dB 1.2 Antenna Location and Pattern TOP Bottom WLAN/BT ANT 2 WLAN ANT 1 2. Measurement Channel List 1.1 WLAN/BT WLAN BT Frequency Frequency Frequency 2412 MHz 5150MHz 2402 MHz 2437 MHz 5200MHz 2426 MHz 2442MHz 5250MHz 2480 MHz 2462 MHz 5300MHz 2472MHz 5350MHz 5470MHz 5600MHz 5725MHz 5785MHz 5850MHz 3. Test Program Used 1. EMQuest 1.08 4. Test Instruments Manufacturer Model No. Serial No. Calibrated Date Calibrated Until ETS AMS-8500 N/A 2025/5/15 2026/5/14 Keysight 5071B N/A 2025/5/20 2026/5/19 Keysight 3499B N/A 2021/10/30 N/A Note: 1. The test was performed in AMS-8500 anechoic chamber 2. Te s ted Date: 2025/09/11 5. Test Arrangements 5.1 Test setup 5.2 Test Procedure a. Setup DUT into the antenna chamber and place the DUT in the center of table, and b. Connect it to the test equipment through the IPEX connector; c. Open the EMQuest software, set the test frequency band, and start the test; d. In EMQuest Perform data post-processing, generate the required data, and export the data. 5.3 Test Setup Photo X Z Y X Z Y 5.4 VSWR Test Setup Photo 1.Remove resistors R26 and R27 2.Connect the cable to the pad that leads to the antenna. 3.Measuring VSWR with ANT1 connected to the network analyzer, ANT 2 should be terminated with a 50 ohm load. 4.Measuring VSWR with ANT 2 connected to the network analyzer, ANT 1 should be terminated with a 50 ohm load. 1.The distance between the antenna area and the dummy PCBA is 1.5 mm. 2.For the measurements, the table consisted of non-metallic and the foam is 10 cm thick. Antenna area Dummy PCBA:110*65mm 50 ohm foam 6. Test Results 6.1 RETURN LOSS WLAN ANT1 WLAN/BT ANT2 6.2 Antenna Gain Summary Table 6.2.1 WLAN ANT1 XY Plane ZY Plane ZX Plane Frequency [MHz] Average Gain [dBi] Peak Gain [dBi] Average Gain [dBi] Peak Gain [dBi] Average Gain [dBi] Peak Gain [dBi] 2412 -4.82 -3.16 -7.59 -3.03 -6.48 -4.42 2437 -4.68 -3.31 -7.17 -2.39 -6.15 -3.39 2442 -4.51 -3.18 -6.89 -2.68 -6.26 -3.28 2462 -4.47 -3.43 -6.74 -2.47 -5.89 -3.52 2472 -4.98 -3.65 -6.56 -2.35 -6.11 -3.17 5150 -11.87 -8.51 -2.51 1.90 -2.72 2.35 5200 -10.19 -7.79 -2.82 1.74 -2.26 2.79 5250 -8.22 -5.38 -2.47 1.59 -2.58 3.26 5300 -7.84 -6.04 -3.18 1.94 -2.75 2.02 5350 -7.75 -5.25 -2.87 1.57 -2.92 2.58 5470 -6.86 -4.85 -3.13 1.48 -2.64 3.16 5600 -6.02 -4.67 -3.29 1.62 -2.19 2.28 5725 -5.41 -3.78 -2.93 1.39 -1.68 3.29 5785 -6.29 -4.14 -2.95 1.21 -2.43 2.03 5850 -5.64 -3.27 -3.45 1.19 -2.21 2.52 6.2.2 WLAN ANT2 XY Plane ZY Plane ZX Plane Frequency [MHz] Average Gain [dBi] Peak Gain [dBi] Average Gain [dBi] Peak Gain [dBi] Average Gain [dBi] Peak Gain [dBi] 2412 -5.73 -4.46 -5.12 -0.74 -3.78 -0.73 2437 -5.25 -4.29 -4.68 0.21 -3.15 0.52 2442 -5.14 -4.47 -4.51 0.32 -2.89 0.91 2462 -5.27 -3.58 -4.29 0.58 -2.52 1.05 2472 -5.03 -3.67 -4.27 0.62 -2.45 1.49 5150 -2.19 -1.79 -3.54 1.71 -1.63 1.57 5200 -1.75 -1.13 -3.18 1.36 -1.98 1.32 5250 -1.51 -0.82 -3.28 1.73 -2.16 2.03 5300 -2.58 -1.05 -3.17 1.37 -2.29 0.94 5350 -2.57 -1.12 -3.04 1.03 -2.11 1.65 5470 -2.17 -0.83 -3.45 0.38 -2.68 1.14 5600 -4.13 -1.89 -4.25 -1.20 -3.76 0.69 5725 -3.89 -1.49 -4.13 0.71 -2.61 0.92 5785 -5.03 -2.84 -4.57 0.47 -3.82 -0.35 5850 -5.42 -3.28 -3.68 0.64 -3.57 1.87 6.2.3 BT ANT2 XY Plane ZY Plane ZX Plane Frequency [MHz] Average Gain [dBi] Peak Gain [dBi] Average Gain [dBi] Peak Gain [dBi] Average Gain [dBi] Peak Gain [dBi] 2402 -5.57 -3.80 -5.17 -0.98 -3.56 -0.40 2426 -4.98 -3.38 -4.78 -0.25 -3.04 0.36 2480 -4.40 -2.68 -4.56 0.27 -2.59 1.05 6.3 Measurement Pattern 6.3.1 WLAN ANT1 Environmental Conditions: 25 °C, 55%RH Brand/ Model FOXCONN/ IR02 Tested By: YY Plane XY Plane ZY Plane ZX Frequency 2412MHz Frequency 2412MHz Frequency 2412MHz Peak Gain(dBi) -3.16 Peak Gain(dBi) -3.03 Peak Gain(dBi) -4.42 Plane XY Plane ZY Plane ZX Frequency 2437MHz Frequency 2437MHz Frequency 2437MHz Peak Gain(dBi) -3.31 Peak Gain(dBi) -2.39 Peak Gain(dBi) -3.39 Plane XY Plane ZY Plane ZX Frequency 2442MHz Frequency 2442MHz Frequency 2442MHz Peak Gain(dBi) -3.18 Peak Gain(dBi) -2.68 Peak Gain(dBi) -3.28 Environmental Conditions: 25 °C, 55%RH Brand/ Model FOXCONN/ IR02 Tested By: YY Plane XY Plane ZY Plane ZX Frequency 2462MHz Frequency 2462MHz Frequency 2462MHz Peak Gain(dBi) -3.43 Peak Gain(dBi) -2.47 Peak Gain(dBi) -3.52 Plane XY Plane ZY Plane ZX Frequency 2472MHz Frequency 2472MHz Frequency 2472MHz Peak Gain(dBi) -3.65 Peak Gain(dBi) -2.35 Peak Gain(dBi) -3.17 Plane XY Plane ZY Plane ZX Frequency 5150MHz Frequency 5150MHz Frequency 5150MHz Peak Gain(dBi) -8.51 Peak Gain(dBi) 1.9 Peak Gain(dBi) 2.35 Plane XY Plane ZY Plane ZX Frequency 5200MHz Frequency 5200MHz Frequency 5200MHz Peak Gain(dBi) -7.79 Peak Gain(dBi) 1.74 Peak Gain(dBi) 2.79 Environmental Conditions: 25 °C, 55%RH Brand/ Model FOXCONN/ IR02 Tested By: YY Plane XY Plane ZY Plane ZX Frequency 5250MHz Frequency 5250MHz Frequency 5250MHz Peak Gain(dBi) -5.38 Peak Gain(dBi) 1.59 Peak Gain(dBi) 3.26 Plane XY Plane ZY Plane ZX Frequency 5300MHz Frequency 5300MHz Frequency 5300MHz Peak Gain(dBi) -6.04 Peak Gain(dBi) 1.94 Peak Gain(dBi) 2.02 Plane XY Plane ZY Plane ZX Frequency 5350MHz Frequency 5350MHz Frequency 5350MHz Peak Gain(dBi) -5.25 Peak Gain(dBi) 1.57 Peak Gain(dBi) 2.58 Plane XY Plane ZY Plane ZX Frequency 5470MHz Frequency 5470MHz Frequency 5470MHz Peak Gain(dBi) -4.85 Peak Gain(dBi) 1.48 Peak Gain(dBi) 3.16 Environmental Conditions: 25 °C, 55%RH Brand/ Model FOXCONN/ IR02 Tested By: YY Plane XY Plane ZY Plane ZX Frequency 5600MHz Fre…

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Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251010069R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 31 FCC Part 15C Test Report FCC ID: 2BSO7-SPAMW21XXM Applicant: SUNPLUS TECHNOLOGY CO., LTD. Address: 19, Innovation First Road Hsinchu Science Park, Taiwan 30076 Manufacturer: SUNPLUS TECHNOLOGY CO., LTD. Address: 19, Innovation First Road Hsinchu Science Park, Taiwan 30076 Product Name: Wireless Audio Module Trade Mark: N/A Model Number: SPA-MW21xx-M, SPA-MW21F3-M, SPA-MW21P2-M Date of Receipt: Oct. 10, 2025 Test Date: Oct. 10, 2025 - Oct. 27, 2025 Date of Report: Oct. 27, 2025 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China Applicable Standards: FCC PART 15 C 15.247 ANSI C63.10-2020+Cor 1-2023 Test Result: Pass Report Number: DLE-251010069R Prepared (Test Engineer): Alisa Song Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251010069R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 31 Table of Contents Page 1. . SUMMARY OF TEST RESULTS 4 1.1. MEASUREMENT UNCERTAINTY 4 2. . GENERAL INFORMATION 5 2.1. GENERAL DESCRIPTION OF EUT 5 2.2. DESCRIPTION OF TEST MODES 6 2.3. BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 6 2.4. DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 7 2.5. TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 7 2.6. EQUIPMENTS LIST FOR ALL TEST ITEMS 8 3. . EMC EMISSION TEST 9 3.1. CONDUCTED EMISSION MEASUREMENT 9 3.1.1. POWER LINE CONDUCTED EMISSION LIMITS 9 3.1.2. TEST PROCEDURE 9 3.1.3. DEVIATION FROM TEST STANDARD 9 3.1.4. TEST SETUP 10 3.1.5. EUT OPERATING CONDITIONS 10 3.1.6. TEST RESULTS 10 3.2. RADIATED EMISSION MEASUREMENT 11 3.2.1. RADIATED EMISSION LIMITS 11 3.2.2. TEST PROCEDURE 12 3.2.3. DEVIATION FROM TEST STANDARD 12 3.2.4. TEST SETUP 12 3.2.5. EUT OPERATING CONDITIONS 13 3.2.6. TEST RESULTS (BETWEEN 9KHZ – 30 MHZ) 14 3.2.7. TEST RESULTS (BETWEEN 30MHZ – 1GHZ) 15 3.2.8. TEST RESULTS (1GHZ~25GHZ) 17 3.3 RADIATED BAND EMISSION MEASUREMENT 18 3.3.1 TEST REQUIREMENT: 18 3.3.2 TEST PROCEDURE 18 3.3.3 DEVIATION FROM TEST STANDARD 18 3.3.4 TEST SETUP 19 3.3.5 EUT OPERATING CONDITIONS 19 3.4 CONDUCTED BAND EDGE EMISSION&CONDUCTED SPURIOUS EMISSIONS MEASUREMENT 21 3.4.1 APPLICABLE STANDARD 21 3.4.2 TEST PROCEDURE 21 3.4.3 DEVIATION FROM STANDARD 21 3.4.4 TEST SETUP 21 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251010069R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 31 Table of Contents Page 3.4.5 EUT OPERATION CONDITIONS 21 3.4.6 TEST RESULTS 21 4. . PEAK OUTPUT POWER 24 4.1. APPLIED PROCEDURES / LIMIT 24 4.1.1. TEST PROCEDURE 24 4.1.2. DEVIATION FROM STANDARD 24 4.1.3. TEST SETUP 24 4.1.4. EUT OPERATION CONDITIONS 24 4.1.5. TEST RESULTS 25 5. . POWER SPECTRAL DENSITY TEST 27 5.1. APPLIED PROCEDURES / LIMIT 27 5.1.1. TEST PROCEDURE 27 5.1.2. DEVIATION FROM STANDARD 27 5.1.3. TEST SETUP 27 5.1.4. EUT OPERATION CONDITIONS 27 5.1.5. TEST RESULTS 27 6. . 6DB BANDWIDTH TEST 29 6.1. APPLIED PROCEDURES / LIMIT 29 6.1.1. TEST PROCEDURE 29 6.1.2. DEVIATION FROM STANDARD 29 6.1.3. TEST SETUP 29 6.1.4. EUT OPERATION CONDITIONS 29 6.1.5. TEST RESULTS 29 7. . ANTENNA REQUIREMENT 31 7.1. STANDARD REQUIREMENT 31 7.2. EUT ANTENNA 31 8. . TEST SEUUP PHOTO 31 9. . EUT PHOTO 31 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251010069R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 31 1.. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.247) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission N/A 15.247(c) Radiated Spurious Emission PASS 15.205 Band Edge Emission PASS 15.247(b) Peak Output Power PASS 15.247(a)(2) 6dB Bandwidth PASS 15.247(e) Power Spectral Density PASS 15.203 Antenna Requirement PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report Test lab: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China FCC Test Firm Registration Number: 854456 Designation Number: CN1307 IC Registered No.: 27485 CAB ID.: CN0118 1.1. 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 Conducted Emission Test ±2.56dB 2 RF power,conducted ±0.42dB 3 Spurious emissions,conducted ±2.76dB 4 All emissions,radiated(<1G) ±3.65dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% 8 6dB Bandwidth ±0.2MHz 9 Power Spectral Density ±0.3dBm Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251010069R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 5 of 31 2.. GENERAL INFORMATION 2.1. GENERAL DESCRIPTION OF EUT Product Name: Wireless Audio Module Trade Mark: N/A Model Number: SPA-MW21xx-M, SPA-MW21F3-M, SPA-MW21P2-M Test Model: SPA-MW21xx-M Sample number: 251010069 -01 Model Difference All models are same as the samples except model name and appearance color, they have the same structure and circuit. Operation Frequency: 2402~2480MHz Channel numbers: 40 Channels Channel separation: 1MHz Modulation technology: GFSK Antenna Type: PCB Antenna Antenna gain: 1.05dBi Power supply: DC 3.3V Note: 1.For a more detailed features description, please refer t…

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FCC ID: 2BSO7-SPAMW21XXM RF Exposure Evaluation Limits The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in KDB 447498 D01 V06 and 1.1307(b) and 2.1091 Limits for Maximum Permissible Exposure (MPE) Frequency range (MHz) Electric field strength (V/m) Magnetic field strength (A/m) Power density (mW/cm 2 ) Averaging time (minutes) (A) Limits for Occupational/Controlled Exposures 0.3–3.0 614 1.63 *(100) 6 3.0–30 1842/f 4.89/f *(900/f 2 ) 6 30–300 61.4 0.163 1.0 6 300–1500 f/300 6 1500–100,000 5 6 (B) Limits for General Population/Uncontrolled Exposure 0.3–1.34 614 1.63 *(100) 30 1.34–30 824/f 2.19/f *(180/f 2 ) 30 30–300 27.5 0.073 0.2 30 300–1500 f/1500 30 1500–100,000 1.0 30 f = frequency in MHz Friis transmission formula: Pd = (Pout*G)/(4*pi*r 2 ) Where Pd = power density in mW/cm 2 , Pout = output power to antenna in mW; G = gain of antenna in linear scale, Pi = 3.1416; R = distance between observation point and center of the radiator in cm Pd id the limit of MPE, 1 mW/cm 2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. EIRP=EMeas+20log(dMeas)-104.7 EIRP is the equivalent isotropically radiated power, in dBm EMeas is the field strength of the emission at the measurement distance, in dBμV/m dMeas is the measurement distance, in m Test Result of RF Exposure Evaluation wifi 5G mode: Band Channel Output power to antenna (dBm) Output power to antenna (mW) Power Density at R=20cm (mW/cm 2 ) Limit (mW/cm 2 ) Result ANT1 ANT2 ANT1 ANT2 ANT1 ANT2 Band 1 802.11a 17.76 17.75 59.7035 59.5662 0.0252 0.0189 1.0 PASS 802.11n HT20 18.57 18.42 71.9449 69.5024 0.0303 0.0221 1.0 PASS 802.11n HT40 18.60 19.30 72.4436 85.1138 0.0305 0.0270 1.0 PASS Remark: antenna gain= Antenna 1:3.26dBi, Antenna 2:2.03dBi Band Channel Output power to antenna (dBm) Output power to antenna (mW) Power Density at R=20cm (mW/cm 2 ) Limit (mW/cm 2 ) Result ANT1 ANT2 ANT1 ANT2 ANT1 ANT2 Band 4 802.11a 19.55 16.20 90.1571 41.6869 0.0383 0.0128 1.0 PASS 802.11n HT20 19.61 16.44 91.4113 44.0555 0.0388 0.0135 1.0 PASS 802.11n HT40 20.63 17.27 115.6112 53.3335 0.0491 0.0163 1.0 PASS Remark: antenna gain= Antenna 1:3.29dBi, Antenna 2:1.87dBi For BT Output power to antenna (dBm) Output power to antenna (mW) Power Density at R=20cm (mW/cm 2 ) Limit (mW/cm 2 ) Result 7.35 5.43 0.0014 1.0 PASS Remark: antenna gain=1.05dBi For Simultaneous transmitting, 1): The sum of the ratios of the spatially averaged results to the applicable frequency dependent MPE limits =0.0014/1 + 0.0491/1 = 0.0505< 1 Since the sum of the MPE ratios for all simultaneously transmitting antennas incorporated in the device is ≤ 1.0, the EUT is considered to satisfy MPE compliance for simultaneous transmission operations.

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(Internal Photos) ※※※※※ END OF REPORT ※※※※※

Size: 12*10mm Model.: SPA-MW21xx-M FCC ID: 2BSO7-SPAMW21XXM Label location

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(External Photos) Shenzhen DL Testing Technology Co., Ltd. WiFi5G ANT WiFi5G/BT2.4G ANT Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: Herland International Trading Inc FRN: 0036324101 Contact Name: Jianfeng Gao Address: 1370 Valley Vista Dr Ste 200 Diamond Bar California 91765-3921 Telephone No: 001-909-772-1888 Email: [email protected] Applicant: Company name: SUNPLUS TECHNOLOGY CO., LTD. Product Description: Wireless Audio Module Grantee code: 2BSO7 FCC ID: 2BSO7-SPAMW21XXM FRN: 0037610789 Contact Name: Lucky song Address: 19, Innovation First Road Hsinchu Science Park, Taiwan 30076 Telephone No: 13714294624 Email: [email protected] [SUNPLUS TECHNOLOGY CO., LTD.] certifies that, as of the date of this filing of the application with the TCB, [Herland International Trading Inc] is our designated US agent for service of process for the above referenced FCC ID. [SUNPLUS TECHNOLOGY CO., LTD.] accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any commission related proceeding involving equipment. [Herland International Trading Inc] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 2025/11/19 Applicant’s Name: Lucky song US Agent’s Name: Jianfeng Gao Title: Manager Title: Manager Signature Signature

C5266091_X10_Ed.2 1/1 SUNPLUS TECHNOLOGY CO., LTD. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2025.11.19 Subject: Request for Confidentiality FCC ID: 2BSO7-SPAMW21XXM To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location No No Attestation Statement No No External Photos No ☐ Block Diagram ☒ ☐ Schematics ☒ ☐ Test Report No No Test Setup Photos No ☐ User’s Manual ☐ NOTE 1 ☐ Internal Photos ☐ NOTE 1 ☐ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☒ No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ______ days from the date of the Grant of Equipment Authorization and prior to marketing. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, C5266091_X10_Ed.2 1/1 Signature: Name: Lucky song Title: Manager 2025.11.19

SUNPLUS TECHNOLOGY CO., LTD. Product function Declaration Applicant: SUNPLUS TECHNOLOGY CO., LTD. Address: 19, Innovation First Road Hsinchu Science Park, Taiwan 30076 Manufacturer: SUNPLUS TECHNOLOGY CO., LTD. Address: 19, Innovation First Road Hsinchu Science Park, Taiwan 30076 Product Name: Wireless Audio Module Trade Mark: N/A Model Number: SPA-MW21xx-M, SPA-MW21F3-M, SPA-MW21P2-M We (SUNPLUS TECHNOLOGY CO., LTD.) here by state that The product has (WIFI2.4G) function at the beginning of design. However, due to the iteration of the product, this function is no longer required at present, so through the (Software mask) method, the function is forced off, and the product (FCC ID: 2BSO7-SPAMW21XXM) no longer has the (WIFI2.4G) function. Signature: <Signature>: Name: Lucky song Title: Manager Company: SUNPLUS TECHNOLOGY CO., LTD.

C5266091_X9_Ed.2 1/1 SUNPLUS TECHNOLOGY CO., LTD. Modular Transmitter Approval Request Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Company Name: SUNPLUS TECHNOLOGY CO., LTD. FCC ID: 2BSO7-SPAMW21XXM Product Name: Wireless Audio Module Gentlemen, In accordance with 47CFR 15.212 Modular Transmitters and KDB 996369 D01 ‘Module Certification Guide v04r02’. FCC ID 2BSO7-SPAMW21XXM has been examined against the following requirements. Items to be covered by Single modular transmitters. Requirement per 15.212 and KDB 996369 D01 ‘Modular Certification Guide v04 Y/N Comments/ Explanation from Grantee (Explain why product complies/how it is achieved) 1.The radio elements must have the radio frequency circuitry shielded. Physical components and tuning capacitor(s) may be located external to the shield, but must be on the module assembly Yes The module has its own RF shield tuning capacitors is integrated inside the module IC. 2.The module must have buffered modulation/data inputs to ensure that the device will comply with Part 15 requirements with any type of input signal Yes Buffered data inputs stage has been integrated in chip RTL8721DCM 3.The module must contain power supply regulation on the module Yes Module with power regulation and support for DC 3.3V input 4.The module must contain a permanently attached antenna, or contain a unique antenna connector, and be marketed and operated only with specific antenna(s), per Sections 15.203, 15.204(b), 15.204(c), 15.212(a), 2.929(b) Yes The module meets the antenna requirements. 5.The module must demonstrate compliance in a stand-alone configuration Yes The module is installed on the motherboard for testing. See the report for details. 6.The module must be labelled with its permanently affixed FCC ID label, or use an electronic display (See KDB Publication 784748 about labelling requirements) Yes The module has its own FCC ID number. See the label for details. 7.The module must comply with all specific rules applicable to the transmitter including all the conditions provided in the integration instructions by the grantee Yes The module meets any specific rules or operational requirements applicable to the transmitter 8.The module must comply with RF exposure requirements Yes The module complies with any applicable RF exposure requirements, as detailed in the instructions. C5266091_X9_Ed.2 1/1 <Signature>: Name: Lucky song Title: Manager Company: SUNPLUS TECHNOLOGY CO., LTD.

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