FCC ID: 2BEHZ-YK321B Remote

Shenzhen Chenda zhike electronics co., ltd Address:Room 1011A15, Building A, Xinghe Century, No.3069 Caitian Road, Gangxia Community, Futian District, Shenzhen TEL86-0755-26788713 FAX86-0755-86095342 User manual 1. Product modelYK321B 2. Operating voltageDC3V 3. Working current8MA 4. Operating temperature-20+65 5. Modulation modeASK 6. Operating frequency433.92MHz 7. Transmission rate2Kbit/s FCC Caution 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: 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:

The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. 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.

= aS ae =

= = 6

= B=

SS =

cs =

o> =

a so So e

= Q =

= 1

= ny me PUTT TTT TE PETIT TTT UPTIME TET, TETTY

= E Sl Ol 02 0 OF OG 09 O02 08 06 001 i) ib i NY 02 0 OF 0G 09 02 08 06001 01 oz o ob 0S 09 02 MTUTNTO OT OLLOTONLOTOOLOTTORVOTUAT VAY OnTOU NAT NaTUATITOLITND ITNT ITNT TTT ES

Shenzhen Chenda zhike electronics co., ltd 2024.1.11 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern:

We, the undersigned, hereby authorize Shenzhen BCTC Testing 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, Clients signature:

Clients name / title : Xiaosan Zhao/Manager Contact information / address: Room 1011A15, Building A, Xinghe Century, No.3069 Caitian Road, Gangxia Community, Futian District, Shenzhen, China

(Shenzhen Chenda zhike electronics co., ltd)

(2024.01.12) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID: 2BEHZ-YK321B)

[Shenzhen Chenda zhike electronics co., ltd] (the applicant) certifies that the equipment for which authorization is sought is not covered equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely,

(Applicant signature)

(Applicant printed name) Xiaosan Zhao

(Shenzhen Chenda zhike electronics co., ltd)

(2024.01.12) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID: 2BEHZ-YK321B)

[Shenzhen Chenda zhike electronics co., ltd] (the applicant) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing covered equipment. Sincerely,

(Applicant signature)

(Applicant printed name) Xiaosan Zhao

Shenzhen Chenda zhike electronics co., ltd 2024.1.11 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Remote Trademark: N/A MODEL : Yk321B Yk321B-1, yk321B-3 FCC ID: 2BEHZ-YK321B 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. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Clients signature:

Clients name / title : Xiaosan Zhao/Manager Contact information / address: Room 1011A15, Building A, Xinghe Century, No.3069 Caitian Road, Gangxia Community, Futian District, Shenzhen, China

Shenzhen Chenda zhike electronics co., ltd Model Difference 2024.1.11 EUT NAME: Remote Trademark: N/A MODEL : Yk321B Yk321B-1, yk321B-3 FCC ID: 2BEHZ-YK321B All the model are the same circuit and RF module, except model names and appearance of the color. Regards Sincerely Clients signature Clients name / title : Xiaosan Zhao/Manager Contact information / address: Room 1011A15, Building A, Xinghe Century, No.3069 Caitian Road, Gangxia Community, Futian District, Shenzhen, China

Shenzhen Chenda zhike electronics co., ltd U.S. Agent Designation for Service of Process

(Applicant and U.S. Agent are Separate Parties) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA ATTENTION: FCC Certification Section 2.911(d)(7) Information Designated U.S. Agent Company Name: Baihetian Innovative Solutions FRN: 0033401605 Contact Name: Kenneth Young Street Address: 6837 Chase Rd City/Province/Zip: Dearborn, MI 48126 Telephone No: 313-395-3113 Email: ken.young@baihetiansolutions.com This letter is to confirm that we (the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911(d)(7) on behalf of the Applicant noted below. U.S. Agent Signature:

Date:

Signed by (Printed Name/Title):

The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shenzhen Chenda zhike electronics co., ltd Grantee Code: 2BEHZ FRN : 0034729350 FCC ID : 2BEHZ-YK321B Contact Name: Xiaosan Zhao Street Address: Room 1011A15, Building A, Xinghe Century, No.3069 Caitian Road, Gangxia Community, Futian District, Shenzhen, China Telephone No: 0755-86095342 Email: 1071402289@qq.com Applicant Signature:

Date: 2024-01-12 Signed by (Printed Name/Title): Xiaosan Zhao /Manager