YJFWK303Wireless Keyless Entry Pad for Garage Door Opener

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 modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. 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.

C5266091_X8_Ed.1 1/1 GUARDIAN SHANGHAI CORP. Letter of Authorization Company: GUARDIAN SHANGHAI CORP. Address: 368, Min Shen Rd, SongJiang,Shanghai, China Product Name: Wireless Keyless Entry Pad for Garage Door Opener Model Number: WK303 FCC Identifier: YJFWK303 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: Vincent Chan Date: 2022-09-14 Title: Product Manager Signature of applicant:

C5266091_X10_Ed.2 1/1 GUARDIAN SHANGHAI CORP. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2022-09-13 Subject: Request for Confidentiality FCC ID: YJFWK303 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 NOTE 2 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 ☐ NOTE 1 ☐ Internal Photos ☐ NOTE 1 ☐ Parts List / Tune Up ☐ ☐ RF Exposure Info No No Operational Description ☒ ☐ Cover Letter(s) No No SDR Software / Security Info ☐ No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. 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. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of ______ days from the date of the Grant of Equipment Authorization and prior to marketing. 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, Vincent Chan

Document No: SHE22080091-01 Page 1 of 3 WK303 External photo Front Rear Document No: SHE22080091-01 Page 2 of 3 Left side Right side Document No: SHE22080091-01 Page 3 of 3 Top Bottom

Document No: SHE22080091-01 Page 1 of 1 Label & Location

Document No: SHE22080091-01 Page 1 of 2 WK303 Internal photo Internal 1 Internal 2 Document No: SHE22080091-01 Page 2 of 2 Internal 3

TEST REPORT Report No.: SHE22080091-01AE Date: 2022-08-31 Page 1 of 26 Applicant : GUARDIAN SHANGHAI CORP. Address of Applicant : 368, Min Shen Rd, SongJiang,Shanghai, China Product Name : Wireless Keyless Entry Pad for Garage Door Opener Brand Name : Guardian Model No. : WK303 Sample No. : E22080091-01#01 E22080091-01#02 FCC ID : YJFWK303 Standards : FCC CFR47 Part 15, Subpart C Section 15.231 Date of Receipt : 2022-08-25 Date of Test : 2022-08-26~2022-08-30 Date of Issue : 2022-08-31 Remark: This report details the results of the testing carried out on one sample, the results contained in this report do not relate to other samples of the same product. The manufacturer should ensure that all products in series production are in conformity with the product sample detailed in this report. Prepared by： Reviewed by： Approved by： (Erik Yang) (Jennifer Zhou) (Authorized signatory: Guoyou Chi) TEST REPORT Report No.: SHE22080091-01AE Date: 2022-08-31 Page 2 of 26 Contents 1 GENERAL INFORMATION ................................................................................................................................................... 3 1.1 TESTING LABORATORY ............................................................................................................................................................... 3 1.2 DETAILS OF APPLICATION .......................................................................................................................................................... 3 1.3 DETAILS OF EUT ........................................................................................................................................................................ 3 1.4 TEST METHODOLOGY ................................................................................................................................................................. 4 1.5 TEST SUMMARY .......................................................................................................................................................................... 4 2 TEST CONDITION .................................................................................................................................................................. 5 2.1 ENVIRONMENTAL CONDITIONS ................................................................................................................................................... 5 2.2 EQUIPMENT LIST ........................................................................................................................................................................ 5 2.3 MEASUREMENT UNCERTAINTY................................................................................................................................................... 5 3 TEST SET-UP AND OPERATION MODES ........................................................................................................................ 6 3.1 DETAILS OF TEST MODE ............................................................................................................................................................ 6 3.2 SPECIAL ACCESSORIES AND AUXILIARY EQUIPMENT ................................................................................................................ 6 3.3 SUPPORT SOFTWARE ................................................................................................................................................................. 6 3.4 TEST SETUP DIAGRAM ............................................................................................................................................................... 6 4 TEST RESULTS ...................................................................................................................................................................... 7 4.1 TRANSMITTER REQUIREMENT & TEST SUITES .......................................................................................................................... 7 4.1.1 Antenna Requirement ....................................................................................................................................................... 7 4.1.2 Provision For Momentary Operation ............................................................................................................................... 8 4.1.3 Duty Cycle Correction Factor ......................................................................................................................................... 10 4.1.4 Radiated Emission ........................................................................................................................................................... 12 4.1.5 20dB Bandwidth ............................................................................................................................................................... 19 5 APPENDIXES ........................................................................................................................................................................ 21 5.1 PHOTOGRAPHS OF THE SAMPLE .............................................................................................................................................. 21 5.2 PHOTOGRAPHS OF THE TEST SET-UP ..................................................................................................................................... 26 TEST REPORT Report No.: SHE22080091-01AE Date: 2022-08-31 Page 3 of 26 1 General Information 1.1 Testing Laboratory Company Name ICAS Testing Technology Service (Shanghai) Co., Ltd. Address No.1298 Pingan Rd, Minhang District, Shanghai, China Telephone 0086 21-51682999 Fax 0086 21-54711112 Homepage www.icasiso.com 1.2 Details of Application Applicant Company Name GUARDIAN SHANGHAI CORP. Address 368, Min Shen Rd, SongJiang,Shanghai, China Contact Person Vincent Chan Telephone +86-21-57684828 Email [email protected] Manufact…

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PCB Antenna Dimension: 40.7mm x 9.4mm Frequency: 303MHz

Document No: SHE22080091-01 Page 1 of 1 1.1 Set-up for Spurious Emissions below 1GHz Below 1 GHz 1.2 Set-up for Spurious Emissions above 1GHz Above 1GHz