2AZES-AC1LUSB Wi-Fi Adapter

FCC Radiation Exposure Statement: This device meets the government's requirements for exposure to radio waves. The guidelines are based on standards that were developed by independent scientific organizations through periodic and thorough evaluation of scientific studies. The standards include a substantial safety margin designed to assure the safety of all persons regardless of age or health. The SAR limit of USA (FCC) is 1.6 W/kg averaged. Device types: USB Wi-Fi Adapter (FCC ID: 2AZES-AC1L) has also been tested against this SAR limit. SAR information on this and other pad can be viewed on‐line at http://www.fcc.gov/oet/ea/fccid/. Please use the device FCC ID number for search. This device was tested simulation typical 5mm to body. To maintain compliance with FCC RF exposure requirements, use accessories should maintain a separation distance between the user's bodies mentioned above, use accessories should not contain metallic components in its assembly, the use of accessories that do not satisfy these requirements may not comply with FCC RF exposure requirements, and should be avoided. FCC Warning 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. NOTE 1: 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. NOTE 2: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

Reference No.: WTX21X03021564W-1/2 Page 2 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EXHIBIT 2 - EUT EXTERNAL PHOTOGRAPHS EUT View 1 EUT View 2 Reference No.: WTX21X03021564W-1/2 Page 3 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EUT View 3 EUT View 4 Reference No.: WTX21X03021564W-1/2 Page 4 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EUT View 5 EUT View 6

Reference No.: WTX21X03021564W-1/2 Page 1 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn ANNEX EXHIBIT 1 - PRODUCT LABELING Proposed FCC ID Label Format FCC ID: 2AZES-AC1L Specifications: The label shall be securely affixed to a permanently attached part of the device, in a location where it is visible or easily accessible to the user, and shall not be readily detachable. The label shall be sufficiently durable to remain fully legible and intact on the device in all normal conditions of use throughout the device’s expected lifetime. Proposed Label Location on EUT FCC ID Label Location

Reference No.: WTX21X03021564W-1/2 Page 5 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EXHIBIT 3 - EUT INTERNAL PHOTOGRAPHS EUT Housing and Board View 1 EUT Housing and Board View 2 Reference No.: WTX21X03021564W-1/2 Page 6 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Solder Board-Component View 1 Solder Board-Component View 2 Reference No.: WTX21X03021564W-1/2 Page 7 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Antenna View Antenna View

Ref : ACR.233.1.17.SATU.A WALTEK TESTING GROUP (SHENZHEN) CO., LTD. 1/F, BUILDING A, HONGWEI INDUSTRIAL PARK, LIUXIAN 2ND ROAD BAO'AN DISTRICT SHENZHEN (518101), CHINA MVG COMOSAR DOSIMETRIC E-FIELD PROBE SERIAL NO.: SN 45/15 EPGO280 Calibrated at MVG US 2105 Barrett Park Dr. - Kennesaw, GA 30144 Calibration Date: 07/03/2020 Summary: This document presents the method and results from an accredited COMOSAR Dosimetric E-Field Probe calibration performed in MVG USA using the CALISAR / CALIBAIR test bench, for use with a COMOSAR system only. All calibration results are traceable to national metrology institutions. COMOSAR E-Field Probe Calibration Report COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref: ACR.233.1.17.SATU.A Page: 2/10 This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. Name Function Date Signature Prepared by : Jérôme LUC Product Manager 7/3/2020 Checked by : Jérôme LUC Product Manager 7/3/2020 Approved by : Kim RUTKOWSKI Quality Manager 7/3/2020 Customer Name Distribution : Waltek Testing Group (Shenzhen) Co., Ltd. Issue Date Modifications A 7/3/2020 Initial release COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref: ACR.233.1.17.SATU.A Page: 3/10 This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. TABLE OF CONTENTS 1 Device Under Test ..................................................................................................... 4 2 Product Description ................................................................................................... 4 2.1 General Information _______________________________________________________ 4 3 Measurement Method ................................................................................................ 4 3.1 Linearity ________________________________________________________________ 4 3.2 Sensitivity _______________________________________________________________ 5 3.3 Lower Detection Limit _____________________________________________________ 5 3.4 Isotropy _________________________________________________________________ 5 3.5 Boundary Effect __________________________________________________________ 5 4 Measurement Uncertainty .......................................................................................... 5 5 Calibration Measurement Results .............................................................................. 6 5.1 Sensitivity in air __________________________________________________________ 6 5.2 Linearity ________________________________________________________________ 7 5.3 Sensitivity in liquid ________________________________________________________ 7 5.4 Isotropy _________________________________________________________________ 8 6 List of Equipment .................................................................................................... 10 COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref: ACR.233.1.17.SATU.A Page: 4/10 This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. 1DEVICE UNDER TEST Device Under Test Device Type COMOSAR DOSIMETRIC E FIELD PROBE Manufacturer MVG Model SSE2 Serial Number SN 45/15 EPGO280 Product Condition (new / used) New Frequency Range of Probe 0.7 GHz-6GHz Resistance of Three Dipoles at Connector Dipole 1: R1=0.193 M Dipole 2: R2=0.188 M Dipole 3: R3=0.198 M A yearly calibration interval is recommended. 2PRODUCT DESCRIPTION 2.1 GENERAL INFORMATION MVG’s COMOSAR E field Probes are built in accordance to the IEEE 1528, OET 65 Bulletin C and CEI/IEC 62209 standards. Figure 1 – MVG COMOSAR Dosimetric E field Dipole Probe Length 330 mm Length of Individual Dipoles 2 mm Maximum external diameter 8 mm Probe Tip External Diameter 2.5 mm Distance between dipoles / probe extremity 1 mm 3 MEASUREMENT METHOD The IEEE 1528, OET 65 Bulletin C, CENELEC EN50361 and CEI/IEC 62209 standards provide recommended practices for the probe calibrations, including the performance characteristics of interest and methods by which to assess their affect. All calibrations / measurements performed meet the fore mentioned standards. 3.1 LINEARITY The evaluation of the linearity was done in free space using the waveguide, performing a power sweep to cover the SAR range 0.01W/kg to 100W/kg. COMOSAR E-FIELD PROBE CALIBRATION REPORT Ref: ACR.233.1.17.SATU.A Page: 5/10 This document shall not be reproduced, except in full or in part, without the written approval of MVG. The information contained herein is to be used only for the purpose for which it is submitted and is not to be released in whole or part without written approval of MVG. 3.2 SENSITIVITY The sensitivity factors of the three dipoles were determined using a two step calibration method (air and tissue simulating liquid) using waveguides as outlined in the standards. 3.3 LOWER DETECTION LIMIT The lower detection limit was assessed using the same measurement set up as used for the linearity measurement. The required lower detection limit is 10 mW/kg. 3.4 ISOTROPY The axial isotropy was evaluated by exposing the probe to a reference wave from a standard dipole with the dipole mounted under the flat phantom in the test configuration suggested for system validations and checks. The probe was rotated along its main axis from 0 - 360 degrees in 15 degree steps. The hemispherical isotropy is determined by inserting the probe in a thin plastic box filled with tissue-equivalent liquid, with the plastic …

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Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Page 1 of 59 TEST REPORT Reference No. .................... : WTX21X03021564W FCC ID ................................ : 2AZES-AC1L Applicant ........................... : BrosTrend Technology LLC Address ............................. : 8 The Green, Suite A, Dover City, Delaware, U.S.A., Zip Code 19901 Product Name ................... : USB Wi-Fi Adapter Test Model. ........................ : AC1L Standards .......................... : FCC Part 2.1093 ANSI / IEEE C95.1 : 2005+A1:2010 ANSI / IEEE C95.3 : 2002(R2008) IEEE 1528 :2013 Date of Receipt sample .... : Mar.18, 2021 Date of Test........................ : Mar.18, 2021 to May.08, 2021 Date of Issue ..................... : May.10, 2021 Test Result ......................... : Pass Remarks: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Prepared By: Waltek Testing Group (Shenzhen) Co., Ltd. Address: 1/F., Room 101, Building 1, Hongwei Industrial Park, Liuxian 2nd Road, Block 70 Bao'an District, Shenzhen, Guangdong, China Tel.: +86-755-33663308 Fax.: +86-755-33663309 Tested by: Reviewed By: Approved & Authorized By: Hubrey Cai / Project Engineer Lion Cai / RF Manager Silin Chen / Manager Reference No.: WTX21X03021564W Page 2 of 59 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn TABLE OF CONTENTS 1. General Information ................................................................................................................................................... 3 1.1 Product Description for Equipment Under Test (EUT) ......................................................................................... 3 1.2 Test Standards .................................................................................................................................................... 5 1.3 Test Methodology ................................................................................................................................................ 5 1.4 Test Facility ......................................................................................................................................................... 5 2. Summary of Test Results .......................................................................................................................................... 6 3. Specific Absorption Rate (SAR) ................................................................................................................................ 7 3.1 Introduction .......................................................................................................................................................... 7 3.2 SAR Definition ..................................................................................................................................................... 7 4. SAR Measurement System ........................................................................................................................................ 8 4.1 The Measurement System .................................................................................................................................. 8 4.2 Probe ................................................................................................................................................................... 8 4.3 Probe Calibration Process ................................................................................................................................. 11 4.4 Phantom ............................................................................................................................................................ 12 4.5 Device Holder .................................................................................................................................................... 12 4.6 Test Equipment List ........................................................................................................................................... 13 5. Tissue Simulating Liquids ....................................................................................................................................... 14 5.1 Composition of Tissue Simulating Liquid ........................................................................................................... 14 5.2 Tissue Dielectric Parameters for Head and Body Phantoms ............................................................................. 15 5.3 Tissue Calibration Result ................................................................................................................................... 16 6. SAR Measurement Evaluation ................................................................................................................................ 17 6.1 Purpose of System Performance Check ............................................................................................................ 17 6.2 System Setup .................................................................................................................................................... 17 6.3 Validation Results .............................................................................................................................................. 19 7. EUT Testing Position ............................................................................................................................................... 20 7.1 Body Position .................................................................................................................................................... 20 7.2 EUT Antenna Position .......................................................................…

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Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Page 1 of 98 TEST REPORT Reference No. .................... : WTX21X03021564W-1 FCC ID ................................ : 2AZES-AC1L Applicant ........................... : BrosTrend Technology LLC Address ............................. : 8 The Green, Suite A, Dover City, Delaware, U.S.A., Zip Code 19901 Product Name ................... : USB Wi-Fi Adapter Test Model. ........................ : AC1L Standards .......................... : FCC Part 15.407 Date of Receipt sample .... : Mar.18, 2021 Date of Test........................ : Mar.18, 2021 to Apr.08, 2021 Date of Issue ..................... : Apr.08, 2021 Test Result ......................... : Pass Remarks: The results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Prepared By: Waltek Testing Group (Shenzhen) Co., Ltd. Address: 1/F., Room 101, Building 1, Hongwei Industrial Park, Liuxian 2nd Road, Block 70 Bao'an District, Shenzhen, Guangdong, China Tel.: +86-755-33663308 Fax.: +86-755-33663309 Tested by: Reviewed By: Approved & Authorized By: Mike Shi / Project Engineer Lion Cai / RF Manager Silin Chen / Manager Reference No.: WTX21X03021564W-1 Page 2 of 98 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn TABLE OF CONTENTS 1. GENERAL INFORMATION ................................................................................................................................... 5 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ............................................................................... 5 1.2 TEST STANDARDS ................................................................................................................................................... 6 1.3 TEST METHODOLOGY ............................................................................................................................................. 6 1.4 TABLE FOR PARAMETERS OF TEST SOFTWARE SETTING ......................................................................................... 7 1.5 EUT OPERATING DURING TEST .............................................................................................................................. 8 1.6 TEST FACILITY ....................................................................................................................................................... 8 1.7 EUT SETUP AND TEST MODE ................................................................................................................................. 9 1.8 MEASUREMENT UNCERTAINTY ............................................................................................................................ 10 1.9 TEST EQUIPMENT LIST AND DETAILS ................................................................................................................... 11 2. SUMMARY OF TEST RESULTS ......................................................................................................................... 13 3. ANTENNA REQUIREMENT ................................................................................................................................ 14 3.1 STANDARD APPLICABLE ....................................................................................................................................... 14 3.2 EVALUATION INFORMATION ................................................................................................................................ 14 4. AUTOMATICALLY DISCONTINUE TRANSMISSION .................................................................................. 15 4.1 STANDARD APPLICABLE ....................................................................................................................................... 15 4.2 SUMMARY OF TEST RESULTS ............................................................................................................................... 15 5. POWER SPECTRAL DENSITY ........................................................................................................................... 16 5.1 STANDARD APPLICABLE ....................................................................................................................................... 16 5.2 TEST PROCEDURE ................................................................................................................................................. 16 5.3 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 17 6. EMISSION BANDWIDTH AND OCCUPIED BANDWIDTH ........................................................................... 18 6.1 STANDARD APPLICABLE ....................................................................................................................................... 18 6.2 TEST PROCEDURE ................................................................................................................................................. 18 6.3 SUMMARY OF TEST RESULTS/PLOTS .................................................................................................................... 20 7. MAXIMUM CONDUCTED OUTPUT POWER .................................................................................................. 21 7.1 STANDARD APPLICABLE ....................................................................................................................................... 21 7.2 TEST PROCEDURE ................................................................................................................................................. 21 7.3 SUMMARY OF TEST RESULTS/PLOTS .................................................................................…

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Reference No.: WTX21X03021564W-1/2 Page 8 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn EXHIBIT 4 - TEST SETUP PHOTOGRAPHS Conducted Emission Test Setup Radiation Emission Test Setup (Below 30MHz) Reference No.: WTX21X03021564W-1/2 Page 9 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Radiation Emission Test Setup (30MHz to 1GHz) Radiation Emission Test Setup (1GHz to 18GHz) Reference No.: WTX21X03021564W-1/2 Page 10 of 10 Waltek Testing Group (Shenzhen) Co., Ltd. http://www.semtest.com.cn Radiation Emission Test Setup (Above 18GHz) ***** END OF REPORT *****