2AYF7-K20G2.4 G Wireless Keyboard Set

FCC Statement 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. Caution: Any changes or modi

DongGuan Zhongxin Electronic Technology Co.,Ltd. Add: 18 Yinhe San Road,Qiaotou Town, Dongguan City,China Date: 2020/12/15 FCC ID: 2AYF7-K20G Dear Sir/Madam, We, DongGuan Zhongxin Electronic Technology Co.,Ltd.. Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number is different for these model: Product name: 2.4 G Wireless Keyboard Set Model no.: K20G, K33G,K35G,K36G,K37G,K38G,K39G,K51G Sincerely, Name/Title： He Luo/Manager Company: DongGuan Zhongxin Electronic Technology Co.,Ltd. Address: 18 Yinhe San Road,Qiaotou Town, Dongguan City Phone: 0769-82366068 E-Mail: [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date: 2020/12/15 TO WHOM IT MAY CONCERN Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: Model No.: K20G FCC ID: 2AYF7-K20G For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title： He Luo/Manager Company: DongGuan Zhongxin Electronic Technology Co.,Ltd. Address: 18 Yinhe San Road,Qiaotou Town, Dongguan City Phone: 0769-82366068 E-Mail: [email protected]

DongGuan Zhongxin Electronic Technology Co.,Ltd. 18 Yinhe San Road,Qiaotou Town, Dongguan City,China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 12/15/2020 To whom it may concern: We, DongGuan Zhongxin Electronic Technology Co.,Ltd. the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2AYF7-K20G including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Name/Title： He Luo/Manager Company: DongGuan Zhongxin Electronic Technology Co.,Ltd. Address: 18 Yinhe San Road,Qiaotou Town, Dongguan City Phone: 0769-82366068 E-Mail: [email protected]

GTSL202012000092 Product Name: 2.4 G Wireless Keyboard Set Test Model No.: K20G EUT Constructional Details External Photo Fig.1 Fig.2 GTSL202012000092 Fig.3 Fig.4 GTSL202012000092 Fig.5 Fig.6

FCC ID : 2AYF7-K20G Label and Location Size: L: 4.0cm*W: 3.0cm Label and Location 2.4 G Wireless Keyboard Set Model No.: K20G FCC ID : 2AYF7-K20G DC 3.0V by Battery 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.

GTSL202012000092 Product Name: 2.4 G Wireless Keyboard Set Test Model No.: K20G EUT Constructional Details Internal Photo Fig.1 Fig.2 GTSL202011000095 Fig.3

Global United Technology Services Co., Ltd. Report No.: GTSL202012000092F01 Authorized Signature: Robinson Luo Laboratory Manager This 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. Page 1 of 31 TEST Report Applicant: DongGuan Zhongxin Electronic Technology Co.,Ltd. Address of Applicant: 18 Yinhe San Road, Qiaotou Town, Dongguan City Manufacturer: DongGuan Zhongxin Electronic Technology Co.,Ltd. Address of Manufacturer: 18 Yinhe San Road, Qiaotou Town, Dongguan City Equipment Under Test (EUT) Product Name: 2.4 G Wireless Keyboard Set Model No.: K20G, K33G,K35G,K36G,K37G,K38G,K39G,K51G Trade Mark: N/A FCC ID: 2AYF7-K20G Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of sample receipt: Dec.27,2020 Date of Test: Dec.27,2020-Dec.10,2020 Date of report issued: Dec.10,2020 Test Result : PASS * * In the configuration tested, the EUT complied with the standards specified above. Report No.: GTSL202012000092F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 2 of 31 2 Version Version No. Date Description 00 Dec.10,2020 Original Tested/Prepared By: Date: Dec.10,2020 Project Engineer Check By: Date: Dec.10,2020 Reviewer Report No.: GTSL202012000092F01 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 3 of 31 3 Contents Page 1 COVER PAGE ........................................................................................................................................... 1 2 VERSION ...................................................................................................................................................2 3 CONTENTS ...............................................................................................................................................3 4 TEST SUMMARY ......................................................................................................................................4 5 GENERAL INFORMATION .......................................................................................................................5 5.1 GENERAL DESCRIPTION OF EUT ..........................................................................................................5 5.2 TEST MODE .........................................................................................................................................7 5.3 DESCRIPTION OF SUPPORT UNITS ........................................................................................................7 5.4 DEVIATION FROM STANDARDS ..............................................................................................................7 5.5 ABNORMALITIES FROM STANDARD CONDITIONS ....................................................................................7 5.6 TEST FACILITY ....................................................................................................................................7 5.7 TEST LOCATION ..................................................................................................................................7 5.8 ADDITIONAL INSTRUCTIONS ..................................................................................................................7 6 TEST INSTRUMENTS LIST ......................................................................................................................8 7 TEST RESULTS AND MEASUREMENT DATA .....................................................................................10 7.1 ANTENNA REQUIREMENT ....................................................................................................................10 7.2 CONDUCTED EMISSIONS ....................................................................................................................11 7.3 CONDUCTED OUTPUT POWER ............................................................................................................12 7.4 CHANNEL BANDWIDTH .......................................................................................................................13 7.5 POWER SPECTRAL DENSITY ..............................................................................................................15 7.6 BAND EDGES .....................................................................................................................................17 7.6.1 Conducted Emission Method ......................................................................................................17 7.6.2 Radiated Emission Method .........................................................................................................18 7.7 SPURIOUS EMISSION .........................................................................................................................21 7.7.1 Conducted Emission Method ......................................................................................................21 7.7.2 Radiated Emission Method .........................................................................................................23 8 TEST SETUP PHOTO .............................................................................................................................31 9 EUT CONSTRUCTIONAL DETAILS .......................................................................................................31 Report No.: GTSL202012000092F01 Global United Technology Services Co., …

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GTSL202012000092 Global United Technology Services Co., Ltd. No. 123-128, Tower A, Jinyuan Business Building, No.2, Laodong Industrial Zone, Xixiang Road, Baoan District, Shenzhen, Guangdong, China 518102 Telephone: +86 (0) 755 2779 8480 Fax: +86 (0) 755 2779 8960 Page 1 of 1 Product Name: 2.4 G Wireless Keyboard Set Test Model No.: K20G Test Setup Photo Radiated Emission ------End------