2AR8X-MM731KKOH1MM731

Cooler Master Technology Inc. Agent Authorization Company: Cooler Master Technology Inc. Address: 8F., No. 788-1, Zhongzheng Rd., Zhonghe Dist., New Taipei City, 23586 Taiwan Product Name: MM731 Model Number(s): MM-731-KKOH1, MM-731-WWOH1 Product Description: MM731 We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: Apr. 15, 2021 Name: Jane Cai Title: Cooler Master Peripheral BU LB Company: Cooler Master Technology Inc.

Cooler Master Technology Inc. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: Apr. 15, 2021 Subject; Request for Confidentiality FCC ID: 2AR8X-MM731KKOH1 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Jane Cai Title: Cooler Master Peripheral BU LB

Model Difference Declaration To Whom It May Concern, We, Cooler Master Technology Inc.(MM731) Trademark:Cooler Master; Model Number:MM-731-KKOH1, MM-731-WWOH1; All model’s the function, software and electric circuit are the same, only with a product color, appearance and model named different for commercial purpose. Test sample model: MM-731-KKOH1. Please contact me if you have any question. Name: Jane Cai Date: Apr. 15, 2021 Title: Cooler Master Peripheral BU LB Signature of applicant:

Annex A External Photos Test Model No.: MM-731-KKOH1 Page 1 of 4 Test Model No.: MM-731-KKOH1 Page 2 of 4 Test Model No.: MM-731-KKOH1 Page 3 of 4 Test Model No.: MM-731-KKOH1 Page 4 of 4

FCC ID LABEL: Ca. 5mm x 10mm Label Location FCC ID: 2AR8X-MM731KKOH1

Annex B Internal Photo Test Model No.: MM-731-KKOH1 Page 1 of 4 Antenna Test Model No.: MM-731-KKOH1 Page 2 of 4 Test Model No.: MM-731-KKOH1 Page 3 of 4 Test Model No.: MM-731-KKOH1 Page 4 of 4

FCC RF Exposure EUT Description: MM731 Model No.: MM-731-KKOH1 FCC ID: 2AR8X-MM731KKOH1 1. Limits According to KDB 447498 D01 General RF Exposure Guidance v06 The 1‐g and 10‐g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤50 mm are determined by: [(max power of channel, including tune‐up tolerance, mW)/(min. test separation distance, mm)]·[√f(GHz)]≤3.0 for 1‐g SAR and ≤ 7.5 for 10‐g extremity SAR, Where: Result=P/D*√F F= the RF channel transmit frequency in GHz P=Maximum turn‐up power in mw D=Min. test separation distance in mm 2. Test Result of RF Exposure Evaluation Output power （dBm） Tune Up Power （dBm） Max Tune Up power mW Min test separati on distance mm Result Limit SAR Te s t Exclusio n BLE 1.703 1±1(2) 1.585 5 0.491 3.0 Pass Note: PK Output power= conducted power. Conducted power see the test report HK2103090621-1E antenna gain=0dBi Per KDB 447498 D01, when the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. The test exclusion threshold is 0.491 which is<= 3, SAR testing is not required. Note: Exclusion Thresholds Results=[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f (GHz)] f(GHz) is the RF channel transmit frequency in GHz Distance=5mm

Page 1 of 43 Report No.: HK2103090621-1E TEST REPORT FCC PART 15 SUBPART C 15.247 T est report On Behalf of Cooler Master Technology Inc. For MM731 Model No.: MM-731-KKOH1, MM-731-WWOH1 FCC ID: 2AR8X-MM731KKOH1 Prepared for : Cooler Master Technology Inc. 8F., No. 788-1, Zhongzheng Rd., Zhonghe Dist., New Taipei City, 23586 Taiwan Prepared By : Shenzhen HUAK Testing Technology Co., Ltd. 1F, B2 Building, Junfeng Zhongcheng Zhizao Innovation Park, Fuhai Street, Bao'an District, Shenzhen, China Date of Test: Mar. 09, 2021 ~Apr. 12, 2021 Date of Report: Apr. 12, 2021 Report Number: HK2103090621-1E Page 2 of 43 Report No.: HK2103090621-1E TEST RESULT CERTIFICATION Applicant’s name ................... : Cooler Master Technology Inc. Address .................................... : 8F., No. 788-1, Zhongzheng Rd., Zhonghe Dist., New Taipei City, 23586 Taiwan Manufacture's Name .............. : CHUAND ELECTRONIC & TECHNOLOGY CO., LTD. Address .................................... : Sijia Industrial Zone, Shijie Town, Dongguan City, P. R. China Product description Trade Mark: Cooler Master Product name ............................. : MM731 Model and/or type reference .. : MM-731-KKOH1, MM-731-WWOH1 Standards ................................ : 47 CFR FCC Part 15 Subpart C 15.247 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen HUAK Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HUAK Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test .............................................. : Date (s) of performance of tests ................ : Mar. 09, 2021 ~Apr. 12, 2021 Date of Issue ............................................. : Apr. 12, 2021 Test Result ................................................. : Pass Pr epared by: Project Engineer R eviewed by: Project Supervisor Ap proved by: Technical Director Page 3 of 43 Report No.: HK2103090621-1E Contents Page 1 TEST SUMMARY ............................................................................................................................................ 6 1.1 TEST DESCRIPTION ................................................................................................................................ 6 1.2 MEASUREMENT UNCERTAINTY ............................................................................................................ 7 2 TEST FACILITY ............................................................................................................................................... 8 3 GENERAL INFORMATION ............................................................................................................................. 8 3.1 GENERAL DESCRIPTION OF EUT .......................................................................................................... 8 3.2 DESCRIPTION OF TEST CONDITIONS ................................................................................................. 10 3.3 DESCRIPTION OF TEST SETUP ........................................................................................................... 10 4 EQUIPMENTS LIST FOR ALL TEST ITEMS ............................................................................................... 11 5 TEST RESULT .............................................................................................................................................. 13 5.1 ANTENNA REQUIREMENT .................................................................................................................... 13 5.1.1 Standard requirement ...................................................................................................................... 13 5.1.2 EUT Antenna ................................................................................................................................... 13 5.2 CONDUCTION EMISSIONS MEASUREMENT ...................................................................................... 14 5.2.1 Applied procedures / Limit ............................................................................................................... 14 5.2.2 Test procedure ................................................................................................................................. 14 5.2.3 Test setup ........................................................................................................................................ 15 5.2.4 Test results ...................................................................................................................................... 16 5.3 RADIATED EMISSIONS MEASUREMENT............................................................................................. 18 5.3.1 Applied procedures / Limit ............................................................................................................... 18 5.3.2 Test setup ........................................................................................................................................ 18 5.3.3 Test Result ....................................................................................................................................... 20 5.4 MAXIMUM OUTPUT POWER MEASUREMENT .................................................................................... 27 5.4.1 Limit ................................................................................................................................................. 27 5.4.2 Test procedure ................................................................................................................................. 27 5.4.3 Deviation from standard ................................................................................................................... 27 5.4.4 Te…

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Test model：MM-731-KKOH1 Radiated Emission Conducted Power Line Emission test