2BH4F-K19RF Detector

FCC Warning 15.19 Labeling requirements. 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. 15.21 Information to user. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 15.105 Information to the user. 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: -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. FCC RF Radiation Exposure Statement: 1.This Transmitter must not be co- located or operating in conjunction with any other antenna or transmitter. 2.This equipment complies with RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.

Yifei Shenzhen Electronics Co., Ltd. 2.911 (d)(5)(i) Equipment Type Attestation v1.2 Section 2.911(d)(5)(i) Certification – Equipment Type Company name: Yifei Shenzhen Electronics Co., Ltd. Address: The third floor of the 4-2# factory building in Tongfuyu Industrial Zone, Aiqun Road, Shangwu Community, Shiyan Street, Bao'an District, Shenzhen Product Name: RF Detector FCC ID: 2BH4F-K19 Model(s): K19+, K19 2.911(d)(5)(i) Equipment Type We, [Yifei Shenzhen Electronics Co., Ltd.] (“the applicant”) certify that the equipment for which authorization is sought through certification is not:  Prohibited from receiving an equipment authorization pursuant to § 2.903; of the FCC rules.  Identified as an equipment type in the “Covered List” NOTE 1 Yours sincerely, Name: Weihuang Mai Date: 2024-08-07 Title and Company name: general manager NOTE 1 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Yifei Shenzhen Electronics Co., Ltd. 2.911 (d)(5)(ii) Applicant Attestation v1.2 Section 2.911(d)(5)(ii) Certification – Applicant (Covered List ) Company name: Yifei Shenzhen Electronics Co., Ltd. Address: The third floor of the 4-2# factory building in Tongfuyu Industrial Zone, Aiqun Road, Shangwu Community, Shiyan Street, Bao'an District, Shenzhen Product Name: RF Detector FCC ID: 2BH4F-K19 Model(s): K19+, K19 2.911(d)(5)(ii) Applicant filing We, [Yifei Shenzhen Electronics Co., Ltd. ] (“the applicant”) certify that, as of the date of the filing of the application, the applicant is not identified NOTE 1 on the “Covered List” NOTE 2 , established pursuant to § 1.50002 of this chapter, as an entity producing covered communications equipment. Yours sincerely, Name: Weihuang Mai Date: 2024-08-07 Title and Company name: general manager NOTE 1 Delete option not applicable to this application. NOTE 2 “Covered List”; is the List of Equipment and Services Covered By Section 2 of The Secure Networks Act, available at https://www.fcc.gov/supplychain/coveredlist References; 1) 986446 D01 Covered Equipment v01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2) Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

Yifei Shenzhen Electronics Co., Ltd. 2.911 (d)(7)USA Agent v1.2 Section 2.911(d)(7) USA Agent for Service of Process Company name: Yifei Shenzhen Electronics Co., Ltd. Address: The third floor of the 4-2# factory building in Tongfuyu Industrial Zone, Aiqun Road, Shangwu Community, Shiyan Street, Bao'an District, Shenzhen Product Name: RF Detector FCC ID: 2BH4F-K19 Model(s): K19+, K19 2.911(d)(7) USA Designated Agent for Service of Process We, [Yifei Shenzhen Electronics Co., Ltd. ] (“the applicant”) designate [THREE STONES MEDIA LLC] NOTE1 for the purpose of accepting service of process on behalf of the applicant. Applicant consent: We Acknowledge our consent to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address of the designated agent and acknowledge our acceptance of our obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Agent obligation: We Acknowledge our obligation to accept service of process in the United States for matters related to the applicable equipment at our physical U.S. address and email address for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. USA Agent Company name: THREE STONES MEDIA LLC Address: 1200 Broadway St. APT 329, Los Angeles, CA90015 FRN: 0033401761 Contact Name: Sijie Zhang Telephone No: +1 267 909 3692 Email: [email protected] Applicant Company name: Yifei Shenzhen Electronics Co., Ltd. Address: The third floor of the 4-2# factory building in Tongfuyu Industrial Zone, Aiqun Road, Shangwu Community, Shiyan Street, Bao'an District, Shenzhen FRN: 0035762806 FCC Grantee Code: 2BH4F Contact Name: Weihuang Mai Telephone No: 0086-0755-29368805 Email: [email protected] S俨沪� Yifei Shenzhen Electronics Co., Ltd. 2.911 (d)(7)USA Agent v1.2 Signature: Title: Signature: Title: Manager Date: 2024-08-07 Date: 2024-08-07 NOTE 1: An applicant located in the United States may designate itself as the agent for service of process. Reference; Federal Register document 2022-28263 published on 02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threat s-to-the-communications-supply-chain-through-the

Differences Declaration To whom concern, We company Yifei Shenzhen Electronics Co., Ltd. Here by declares: The product model(s) K19 is identical in the PCB layout, electronic schematic and antenna with K19+, only different in model names. Sincerely yours, Name (in print): Weihuang Mai Company name: Yifei Shenzhen Electronics Co., Ltd. Company address: The third floor of the 4-2# factory building in Tongfuyu Industrial Zone, Aiqun Road, Shangwu Community, Shiyan Street, Bao'an District, Shenzhen Tel: 0086-0755-29368805

Yifei Shenzhen Electronics Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2024-08-07 Subject; Request for Long Term Confidentiality FCC ID: 2BH4F-K19 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram BOM Operational Description It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Weihuang Mai Title: general manager

Letter of Authorization Company: Yifei Shenzhen Electronics Co., Ltd. Address: The third floor of the 4-2# factory building in Tongfuyu Industrial Zone, Aiqun Road, Shangwu Community, Shiyan Street, Bao'an District, Shenzhen Product Name: RF Detector Model Number: K19+, K19 FCC Identifier: 2BH4F-K19 We authorize MiCOM Labs Inc, 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the above named equipment. Any individual within MiCOM Labs is authorized to act on our behalf and take action on the application. We declare that MiCOM Labs Inc, 575 Boulder Court, Pleasanton, California 94566, USA, 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 MiCOM Labs on our behalf shall have the same effect as acts of our own. Name: Weihuang Mai Date: 2024-08-07 Title: general manager

Model: K19+ External Model: K19+ Model: K19+ Model: K19+

Label&Location RF Detector Model: K19+ FCC ID: 2BH4F-K19

Model: K19+ Internal Model: K19+

Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 24 BTF Testing Lab (Shenzhen) Co., Ltd. F101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, China FCC Test Report For Applicant Name: Yifei Shenzhen Electronics Co., Ltd. Address: The third floor of the 4-2# factory building in Tongfuyu Industrial Zone, Aiqun Road, Shangwu Community, Shiyan Street, Bao'an District, Shenzhen EUT Name: RF Detector Brand Name: N/A Model Number: K19 + Serial Model Number: K19 Issued By Company Name: BTF Testing Lab (Shenzhen) Co., Ltd. Address: F101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, China Report Number: BTF240802R00301 Test Standards: 47 CFR Part 15, Subpart B Test Conclusion: Pass FCC ID: 2BH4F-K19 Sample receipt date： 2024-08-02 Test Date: 2024-08-03 to 2024-08-06 Date of Issue: 2024-08-06 Test By: Xing.Chen / Tester Prepared By: Chris Liu / Project Engineer Approved By: Ryan.CJ / EMC Manager Note: All the test results in this report only related to the testing samples. Which can be duplicated completely for the legal use with approval of applicant; it shall not be reproduced except in full without the written approval of BTF Testing Lab (Shenzhen) Co., Ltd., All the objections should be raised within thirty days from the date of issue. To validate the report, you can contact us. Test Report Number: BTF240802R00301 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 24 BTF Testing Lab (Shenzhen) Co., Ltd. F101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, China Revision History Version Issue Date Revisions Content R_V0 2024-08-06 Original Note: Once the revision has been made, then previous versions reports are invalid. Test Report Number: BTF240802R00301 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 24 BTF Testing Lab (Shenzhen) Co., Ltd. F101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, China Table of Contents 1 INTRODUCTION ..........................................................................................................................................4 1.1 Identification of Testing Laboratory ...............................................................................................4 1.2 Identification of the Responsible Testing Location ......................................................................4 1.3 Announcement .................................................................................................................................4 2 PRODUCT INFORMATION ..........................................................................................................................5 2.1 Application Information ...................................................................................................................5 2.2 Manufacturer Information ................................................................................................................5 2.3 Factory Information .........................................................................................................................5 2.4 General Description of Equipment under Test (EUT) ...................................................................5 2.5 Technical Information ......................................................................................................................5 3 SUMMARY OF TEST RESULTS .................................................................................................................6 3.1 Test Standards ..................................................................................................................................6 3.2 Uncertainty of Test ...........................................................................................................................6 3.3 Summary of Test Result ..................................................................................................................6 4 TEST CONFIGURATION .............................................................................................................................7 4.1 Test Equipment List .........................................................................................................................7 4.2 Test Auxiliary Equipment ................................................................................................................8 4.3 Test Modes ........................................................................................................................................8 5 EMISSION TEST RESULTS (EMI) ..............................................................................................................9 5.1 Conducted emissions on AC mains ...............................................................................................9 5.1.1 E.U.T. Operation: ....................................................................................................................9 5.1.2 Test Setup Diagram: ...............................................................................................................9 5.1.3 Test Data: ............................................................................................................................ 10 5.2 Radiated emissions (Below 1GHz) .............................................................................................. 12 5.2.1 E.U.T. Operation: ................................................................................................................. 12 5.2.2 Test Setup Diagram: .......................................................................................…

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Model: K19+ Conducted emissions on AC mains Radiated emissions (Below 1GHz) Model: K19+ Radiated emissions (Above 1GHz)