FCC ID: 2AUIU-WTHERM Wyze Thermostat

Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: RSZ200803008-RF EXHIBIT A - FCC ID LABEL AND LOCATION FCC ID Label FCC ID Label Location Information Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: RSZ200803008-RF The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

Wyze Labs, Inc. Address: 3933 Lake Washington Blvd NE Suite 350, Kirkland, Washington United States 98033 Telephone No: 5176141124 Email: dsong@wyze.com FCC Confidential Authorization Date: 2020-08-27 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2AUIU-WTHERM In accordance with Sections 0.457 and 0.459 of the Commissions Rules, Wyze Labs, Inc. hereby requests long-term confidential treatment of information accompanying this application as outlined below:

The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Block Diagram Schematics Operation Description Signature:

Name: Dongsheng Song Title: chief product officer

Wyze Labs, Inc. Address: 3933 Lake Washington Blvd NE Suite 350, Kirkland, Washington United States 98033 Telephone No: 5176141124 Email: dsong@wyze.com FCC Authorization Date: 2020-08-27 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern:

We Wyze Labs, Inc., the undersigned, hereby authorizes Bay Area Compliance Laboratories Corporation to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corporation on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature:

Name: Dongsheng Song Title: chief product officer QA-FR-170-B 7/29/2014

Wyze Labs, Inc. Address: 3933 Lake Washington Blvd NE Suite 350, Kirkland, Washington United States 98033 Telephone No: 5176141124 Email: dsong@wyze.com Date: 2020/09/28 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern:

The RF chip, model ESP32-D0WD, which installed in our product Wyze Thermostat, Model: WTHERM, FCC ID: 2AUIU-WTHERM, supports 2.4G WiFi, BDR (GFSK), EDR (/4-

DQPSK, 8DPSK), and BLE functions. For use in America and this chip will not support/enable BDR (GFSK), EDR (/4-DQPSK, 8DPSK) function. The BDR (GFSK), EDR

(/4-DQPSK, 8DPSK) function has been shielded by the manufacturer using the software. Sincerely Yours, Signature:

Printed Name: Dongsheng Song Title: chief product officer