2BVRS-PA300Emergency Siren PA System

150W SIREN AMPLIFIER WITH PTT MICROPHONE INSTRUCTION MANUAL ALL YYATYS PRODUCTS COME WITH PREMIUM AFTER-SALES SUPPORT. IN THE UNLIKELY EVENT OF ANY PRODUCT ISSUES, WE OFFER A FULL REFUND OR REPLACEMENT – YOUR SATISFACTION IS GUARANTEED. IMPORTANT: READ CAREFULLY BEFORE ASSEMBLY AND USE. Installer of this product must have a good understanding of automotive electronics, systems, and procedures. DANGER! In the case that holes must be drilled in order to properly mount the product, the installer must examine both sides of the mounting surface before drilling begins. It is the installer's responsibility to be sure that no vehicle components or vital parts could be damaged by the drilling process. De-burr any holes in order to remove metal shards and remnants. Use grommets in all wire passage holes. Do not attempt to activate or operate this product under hazardous driving situations. Never operate the siren indoors or in an enclosed area. Deployment area of the vehicle air bags must be cleared. Do not install this product or route any electrical wires near the air bags deployment areas. Refer to your vehicle owner's manual for the air bag deployment area. Products or wires mounted in the air bag deployment area will damage, reduce the effectiveness of the air bag, or even act as a projectile which may cause serious injury or death. The user/installer of this product assumes full responsibility in determining the proper mounting location while prioritizing the safety of all passengers in the vehicle. SAE J1849 recommends that the maximum sound pressure level in the passenger area, with the vehicle in motion and the siren active, should not exceed 85 dB. Sirens are designed to produce extremely loud emergency warning tones! Exposure to the tones produced without proper and adequate hearing protections, could lead to ear damage and/or hearing loss! The Occupational Safety & Health Administration (www.osha.gov) provides information necessary to determine safe exposure times in Occupational Noise Exposure Section 1910.95. The operators of the siren and any one in the immediate vicinity of the siren should be required to wear an approved hearing protection device until one has determined the safe exposure times for your specific application. FAILURE TO FOLLOW THIS RECOMMENDATION COULD CAUSE HEARING LOSS! Specifications: Contents: Input Voltage: 12V DC Input Current: 15 Amps Speaker Impedance: 8 Ohms Min. Power rating: 150 Watts Frequency: 400 - 4,000 Hz Sound Compression Level: 120 – 130 dB 1 Bail Strap Bracket Siren with PTT Mic. Wiring Bundle Wiring for Battery Siren Speaker 1 1 1 1 1 1 Mounting Accessories Fuse(s) Functions: Manual Horn/Siren This switch has two positions. Down - Siren & Up- Horn. The siren and horn warning tone could be activated manually by engaging the switch to the positions. Horn function can also be activated with the vehicle horn relay by connecting the horn/radio wire of the siren unit to the horn relay of the automobile. (see wiring diagram) PTT Mic Push to talk microphone which overrides any activated warning tone when in use. Rotary Switch The rotary knob controls siren functions. There are 5 positions that may be selected. (see switch functions below for detail) Speaker/Mic Volume The volume knob controls the volume of siren and public address function. Rotating the knob clockwise will increase the volume. Rotating the knob counter-clockwise will decrease the volume. Rotating the knob to minimal volume will disable all siren functions. The auxiliary switches are meant to be used to power other equipment on the vehicle. Each auxiliary switch is fused with a 20 amp AGC fuse. Aux Switch 1 & 2 Switch Functions: Optional − Radio With the rotary knob set to this function, the radio function would be activated. Any signal that is received by the vehicle's two-way radio will be broadcasted over the connected speaker. (the siren must be connected to the two-way radio as outlined in wiring section of this manual) − Stand-by − Horn Override − Yelp - Activates Yelp warning tone. − Wail - Activates Wail warning tone. − Hi-Lo - Activates Hi-Lo warning tone. − Hi-Lo 2 - Activates Hi-Lo 2 warning tone. With the rotary knob set to this function, the siren will be in stand-by. Manual Horn/Siren and PTT Mic functions are enabled during stand-by. This function, if used, will always be active when the siren unit is on. When it’s active, the stock steering wheel horn button will trigger the air horn instead of the stock horn. When the siren unit is turned off, the steering wheel horn button will once again trigger the stock horn. (the siren must be connected to the stock horn wiring as outlined in the wiring section of this manual) − Radio Bypass The siren must be connected to the two-way radio as outlined in wiring section of this manual. WARRANTY Thank you for purchasing our products! We insist on customer first, and always help solve the problem, which can improve our service and the quality of the product, to meet customers' demands. Strong technical strength and perfect customer service system are assured to guarantee the purchase and usage. We offer 3 years warranty. Any problems with the products just contact us on Amazon, or send us the email, or contact us on FB, we provide REPLACEMENT or REFUND services, plz purchase with confidence f YYATYS [email protected] - Be careful and always consult the manufacturer’s wiring diagrams when looking for, and cutting, the horn wire. Often, the wiring for the airbags, turn signals, and windshield wipers will be in the same area. Cutting the wrong wire can cause serious damage to your vehicle. Mounting: The siren Is designed to be mounted directly onto the dash or any other surface around the driver's vicinity using the included bail-strap mounting bracket. The siren unit can also be mounted into the vehicle's console when vehicle is equipped with such a compartment. Siren Amplifier and Microphone Clip − All speakers should be in…

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guangzhouyishangdianzikejiyouxiangongsi Covered Equipment Certification Attestation Letter 4/28/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BVRS-PA300 guangzhouyishangdianzikejiyouxiangongsi (“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. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. guangzhouyishangdianzikejiyouxiangongsi (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. guangzhouyishangdianzikejiyouxiangongsi (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Signed: Printed name: Zhoumin Chen Title: Manager Company Name: guangzhouyishangdianzikejiyouxiangongsi Date: 4/28/2026

guangzhouyishangdianzikejiyouxiangongsi U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: April 28, 2026 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BVRS-PA300 guangzhouyishangdianzikejiyouxiangongsi (“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts 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. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation 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. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Company Name: guangzhouyishangdianzikejiyouxiangongsi FRN: 0038329561 Address: Room 1028, Unit B22, 1630 Jichang Road, Baiyun District, Guangzhou, China Signature: Contact Person: Zhoumin Chen Tel: 13242712116 Email: [email protected]

DATE: April 28, 2026 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen CCUT Quality Technology Co., Ltd. (1F, Building 35, Changxing Technology Indstrl Park Changzhen Community, Yutang Street, Shenzhen, China) to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in the Federal Communications Commission’s regulations will have affixed to it a label identical to that submitted for approval with this application. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, still resides with guangzhouyishangdianzikejiyouxiangongsi (Room 1028, Unit B22, 1630 Jichang Road, Baiyun District, Guangzhou, China). <Signature> Name: Zhoumin Chen Title: Manager Company: guangzhouyishangdianzikejiyouxiangongsi

Date: April 28, 2026 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Compliance Testing, LLC 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). Sincerely, <Signature> Name: Zhoumin Chen Title: Manager Company: guangzhouyishangdianzikejiyouxiangongsi

DATE: April 28, 2026 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BVRS-PA300 Product Name: Emergency Siren PA System Product Model: PA300, YAT-FLCB-01, YAT-FLZF-01 Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commission’s rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...)  Schematics  Block diagram  Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signature> Name: Zhoumin Chen Title: Manager Company: guangzhouyishangdianzikejiyouxiangongsi

guangzhouyishangdianzikejiyouxiangongsi Model Difference Statement DATE: April 28, 2026 FCC ID: 2BVRS-PA300 Dear Sir/Madam, Added models YAT-FLCB-01, YAT-FLZF-01 basis of the original product PA300. The color of appearance and model name of series models listed are different from the main model, but the circuit and the electronic construction are the same, declared by the manufacturer. Sincerely, Name: Zhoumin Chen Title: Manager Company name: guangzhouyishangdianzikejiyouxiangongsi Address: Room 1028, Unit B22, 1630 Jichang Road, Baiyun District, Guangzhou, China

Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report Annex A. EUT External Photos Model: PA300 EUT View 1 EUT View 2 Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report EUT View 3 EUT View 4 Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report EUT View 5 EUT View 6 Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report EUT View 7

Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report Annex D. Label and Inf ormation FCC Label Sample FCC Labe Size: 14cm* 7cm FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location

Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report Annex B. EUT Internal Photos Model: PA300 EUT Internal View 1 EUT Internal View 2 Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report EUT Internal View 3 EUT Internal View 4 Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report EUT Internal View 5 EUT Internal View 6 Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report EUT Internal View 7

Report No: SSP26040450-1E EMC Test Report Page 1 of 12 EMC TEST REPORT FCC ID: 2BVRS-PA300 Report No. : SSP26040450-1E Applicant : guangzhouyishangdianzikejiyouxiangongsi Product Name : Emergency Siren PA System Model Name : PA300 Test Standard : FCC Part 15 Subpart B Date of Issue : 2026-04-28 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. Report No: SSP26040450-1E EMC Test Report Page 2 of 12 Test Report Basic Information Applicant..................................: guangzhouyishangdianzikejiyouxiangongsi Address of Applicant...............: Room 1028, Unit B22, 1630 Jichang Road, Baiyun District, Guangzhou, China Manufacturer..........................: guangzhouyishangdianzikejiyouxiangongsi Address of Manufacturer........: Room 1028, Unit B22, 1630 Jichang Road, Baiyun District, Guangzhou, China Product Name.........................: Emergency Siren PA System Brand Name.............................: YYATYS Main Model..............................: PA300 Series Models..........................: YAT-FLCB-01, YAT-FLZF-01 Test Standard..........................: FCC Part 15 Subpart B ANSI C63.4-2014 Date of Test .............................: 2026-04-20 to 2026-04-22 Test Result...............................: PASS Tested By ................................: (Walker Wu) Reviewed By............................: (Lorzix Luo) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. Report No: SSP26040450-1E EMC Test Report Page 3 of 12 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................5 1.3 Compliance Standards ...........................................................................................................................................6 1.4 Test Facilities ........................................................................................................................................................6 1.5 Measurement Uncertainty .....................................................................................................................................6 1.6 List of Test and Measurement Instruments ............................................................................................................7 2. Summary of Test Results .............................................................................................................................................8 3. Conducted Emissions ..................................................................................................................................................9 3.1 Standard and Limit................................................................................................................................................9 3.2 Test Procedure......................................................................................................................................................9 3.3 Test Data and Results ............................................................................................................................................9 4. Radiated Disturbance ................................................................................................................................................ 10 4.1 Standard and Limit.............................................................................................................................................. 10 4.2 Test Procedure.................................................................................................................................................... 10 4.3 Test Data and Results .......................................................................................................................................... 10 Report No: SSP26040450-1E EMC Test Report Page 4 of 12 Revision History Revision Issue Date Description Revised By V1.0 2026-04-28 Initial Release Lahm Peng Report No: SSP26040450-1E EMC Test Report Page 5 of 12 1. General Inf ormation 1.1 Product Information Product Name: Emergency Siren PA System Trade Name: YYATYS Main Model: PA300 Series Models: YAT-FLCB-01, YAT-FLZF-01 Class of Equipment: Class A Class B Highest Internal Frequency: <108MHz Rated Voltage: DC 12V by battery Note 1: The test data is gathered from a production sample, provided by the manufacturer. Note 2: The color of appearance and model name of series models listed are different from the main model, but the circuit and the electronic construction are the same, declared by the manufacturer. 1.2 Test Setup Information List of Test Modes Test Mode Description Remark TM1 Operating - - - - List and Details of Auxiliary Cable Description Length (cm) Shielded/Unshielded With/Without Ferrite - - - Without Ferrite - - - - - - - - List and Details of Auxiliary Equipment Description Manufacturer Model Serial Number - - - - - - - - - - - - The equipment under test (EUT) was configured to measure its highest possible emission and immunity level. The test modes …

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Report No: SSP26040450-1E FCC ID: 2BVRS-PA300 Annex of Test Report Annex C. Test Photos Radiated Emission Test View 1