FCC ID: 2ASYY-GS828A-C Carbon Monoxide Alarm

Siterwell Electronics Co., Limited 2022-8-9 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern:

We, the undersigned, hereby authorize EMTEK (NINGBO) CO., LTD. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, CynthiaXia/Certificate engineer Siterwell Electronics Co., Limited

Siterwell Electronics Co., Limited 2022-8-6 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Carbon Monoxide Alarm / GS828A-C, GS828C-B #2ASYY-GS828A-C #) To Whom It May Concern:

This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the (Block Diagram, Schematics, Operational Description) required to be submitted with this application be permanently withheld from public review. i.e. the above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, CynthiaXia/Certificate engineer Siterwell Electronics Co., Limited

Siterwell Electronics Co., Limited 2022-8-9 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Short Term Confidentiality Request For Carbon Monoxide Alarm / GS828A-C, GS828C-B # 2ASYY-GS828A-C #

To Whom It May Concern:

In accordance with sections 0.457 and 0.459 of CFR 47, Ningbo lianda winch co., ltd. requests short-term Confidentiality of following sections of this application for a period of 180 days after grant is issued. Test setup photos Internal photos Users manual These documents contain detailed system and equipment descriptions and related information about the product, which Ningbo lianda winch co., ltd considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, Ningbo lianda winch co., ltd feels that this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, CynthiaXia/Certificate engineer Siterwell Electronics Co., Limited

Difference Statement The two models are only named differently. Everything else is the same. We chose "

GS828A-C, GS828C-B GS828A-C " for RF testing August 10, 2022 Cynthia Xia/Certificate engineer Siterwell Electronics Co., Limited