2AOAA-B-2PLUS2.4GHz Wireless System

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C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Cherub Technology Co., Ltd Address: Room507, Block 1, Nanhai E-Cool, No. 6 Xinghua Road, Shekou, Nanshan District, Shenzhen City, Guangdong Province, China, 518067 Product Name: 2.4GHz Wireless System Model Number: B-2 PLUS FCC Identifier: 2AOAA-B-2PLUS 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: Yanjun Meng Date: 11/2/2020 Title: Technical director Signature of applicant:

C5266091_X10_Ed.1 1/1 Cherub Technology Co., Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 11/2/2020 Subject: Request for Confidentiality FCC ID: 2AOAA-B-2PLUS 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 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 Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No 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. 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, Signature: Name: Yanjun Meng Date: 11/2/2020 Title: Technical director

1 - Page 1 of 4 - Report No.: MTi20092410-10E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. APPENDIX 1: EUT PHOTO Photo 1 (For model B-2 PLUS) Photo 2 1 - Page 2 of 4 - Report No.: MTi20092410-10E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Photo 3 Photo 4 1 - Page 3 of 4 - Report No.: MTi20092410-10E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Photo 5 Photo 6 1 - Page 4 of 4 - Report No.: MTi20092410-10E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Photo 7 ----END OF REPORT----

1 - Page 1 of 4 - Report No.: MTi20092410-10E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. APPENDIX 1: EUT PHOTO Photo 1 (For model B-2 PLUS) Photo 2 (For model B-2 PLUS) 1 - Page 2 of 4 - Report No.: MTi20092410-10E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Photo 3 Photo 4 PCB antenna 1 - Page 3 of 4 - Report No.: MTi20092410-10E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Photo 5 Photo 6 1 - Page 4 of 4 - Report No.: MTi20092410-10E1-1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Photo 7 Photo 8 ----END OF REPORT----

This test report is valid for the tested samples only. It cannot be reproduced except in full without prior written consent of Shenzhen Microtest Co., Ltd. Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Test Report FCC ID: 2AOAA-B-2PLUS Date of issue: Oct. 22, 2020 Report number: MTi20092410-10E1 Sample description: 2.4GHz Wireless System Mo d e l( s ) : B-2 PLUS Applicant: Cherub Technology Co., Ltd Address: Room507, Block 1, Nanhai E-Cool, No. 6 Xinghua Road, Shekou, Nanshan District, Shenzhen City, Guangdong Province, China, 518067 Date of test: Oct. 12, 2020 to Oct. 22, 2020 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 28 - Report No.: MTi20092410-10E1 Tel:(86-755)88850135 Fax: (86-755) 88850136 Web: http://www.mtitest.com E-mail: [email protected] Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’ an District, Shenzhen, Guangdong, China. Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 4 1.1 FEATURE OF EQUIPMENT UNDER TEST (EUT) ................................................................................................................... 4 1.2 OPERATION CHANNEL LIST ........................................................................................................................................... 4 1.3 TEST FREQUENCY CHANNEL ......................................................................................................................................... 4 1.4 EUT OPERATION MODE .............................................................................................................................................. 5 1.5 ANCILLARY EQUIPMENT LIST ......................................................................................................................................... 5 2 SUMMARY OF TEST RESULT ............................................................................................................................... 5 3 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................. 6 3.1 TEST LABORATORY...................................................................................................................................................... 6 3.2 ENVIRONMENTAL CONDITIONS ..................................................................................................................................... 6 3.3 MEASUREMENT UNCERTAINTY ...................................................................................................................................... 6 3.4 TEST SOFTWARE ........................................................................................................................................................ 6 4 LIST OF TEST EQUIPMENT .................................................................................................................................. 7 5 TEST RESULT ...................................................................................................................................................... 8 5.1 ANTENNA REQUIREMENT ............................................................................................................................................ 8 5.1.1 Standard requirement ................................................................................................................................. 8 5.1.2 EUT Antenna ............................................................................................................................................... 8 5.2 AC POWER LINE CONDUCTED EMISSION ......................................................................................................................... 9 5.2.1 Limits ........................................................................................................................................................... 9 5.2.2 Test setup .................................................................................................................................................... 9 5.2.3 Test procedure ........................................................................................................................................... 10 5.2.4 Test results ................................................................................................................................................ 10 5.3 FIELD STRENGTH OF FUNDAMENTAL AND HARMONIC EMISSIONS ....................................................................................... 15 5.3.1 Limits ......................................................................................................................................................... 15 5.3.2 Test Method .............................................................................................................................................. 15 5.3.3 Test Result ................................................................................................................................................. 16 5.4 20DB AND 99% BANDWIDTH .................................................................................................................................... 17 5.4.1 Limits ......................................................................................................................................................... 17 5.4.2 Test method ............................................................................................................................................... 17 5.4.3 Test result .....................................................................................…

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Model: B-2 PLUS Radiated emission – below 1GHz Radiated emission – above 1GHz Conducted emission