OQ5-WX54UHF Wireless Transmitter

550.5-583.5MHz FCC Warnning: 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. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 0cm between the radiator and your body. ISED Statement ‐ English: This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions: (1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause undesired operation of the device. ‐ French:Cet appareil contient des émetteurs/récepteurs exempts de licence qui sont conformes aux CNR exempts de licence d’Innovation, Sciences et Développement économique Canada. Le fonctionnement est soumis aux deux conditions suivantes : (1) Cet appareil ne doit pas causer d’interférences. (2) Cet appareil doit accepter toute interférence, y compris les interférences susceptibles de provoquer un fonctionnement indésirable de l’appareil. This equipment complies with Canada radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 0cm between the radiator & your body. Cet équipement est conforme Canada limites d'exposition aux radiations dans un environnement non contrôlé. Cet équipement doit être installé et utilisé avec une distance minimale de 0 cm entre le radiateur et votre corps.

CAD Audio, LLC Add: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Covered Equipment Certification Attestation Letter Date: 2026-5-28 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: OQ5-WX54 CAD Audio, LLC (“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. CAD Audio, LLC (“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. CAD Audio, LLC (“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). Sincerely, Name/Title： Gary Byers/Director of Operations Company: CAD Audio, LLC Address: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Phone: 234-226-1337 Fax: 440-248-4902 E-Mail: [email protected]

CAD Audio, LLC 154 Woodlawn Rd Suite C Berlin, CT 06037 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2026/04/24 U.S. Agent Designation CAD Audio, LLC acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID:OQ5-WX54): Name and company of U.S. agent: CAD Audio, LLC Physical U.S. address of agent: 154 Woodlawn Rd Suite C Berlin, CT 06037 FRN of U.S. agent: 0021896345 Phone of U.S. agent: 234-226-1337 Email address of U.S. agent: [email protected] CAD Audio, LLC acknowledges their obligation to accept service of process on behalf of CAD Audio, LLC with the FRN [0021896345] accepts its 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. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. An expiration date for this letter does not exist. Sincerely, Signature Gary Byers President CAD Audio, LLC Signature Gary Byers President CAD Audio, LLC 48_[mo del] US_Agent_2.911(d)(7) - U, V0 5

CAD Audio, LLC Add: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Date: 2026-5-28 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint SHENZHEN CTA TESTING TECHNOLOGY CO., LTD.,Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community,Fuhai Street, Bao‘an District, Shenzhen, China (Name of Agent company name and address) 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 CAD Audio, LLC,154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States (Applicant Name and address) Sincerely, Name/Title： Gary Byers/Director of Operations Company: CAD Audio, LLC Address: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Phone: 234-226-1337 Fax: 440-248-4902 E-Mail: [email protected]

CAD Audio, LLC Add: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Date: 2026-5-28 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, Name/Title： Gary Byers/Director of Operations Company: CAD Audio, LLC Address: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Phone: 234-226-1337 Fax: 440-248-4902 E-Mail: [email protected]

CAD Audio, LLC Add: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Date: 2026-5-28 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: OQ5-WX54 Product Name: UHF Wireless Transmitter 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. Sincerely, Name/Title： Gary Byers/Director of Operations Company: CAD Audio, LLC Address: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Phone: 234-226-1337 Fax: 440-248-4902 E-Mail: [email protected]

CAD Audio, LLC Add: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Date: 2026-5-28 FCC ID: OQ5-WX54 Dear Sir/Madam, We, CAD Audio, LLC Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number and colour is different for these model: Product name: UHF Wireless Transmitter Model no.: WX54, WX50, WX52HW, WX52 Sincerely, Name/Title： Gary Byers/Director of Operations Company: CAD Audio, LLC Address: 154 Woodlawn Rd Suite C Berlin Connecticut 06037 United States Phone: 234-226-1337 Fax: 440-248-4902 E-Mail: [email protected]

FCC ID: OQ5-WX54 External Photos of the EUT FCC ID: OQ5-WX54 FCC ID: OQ5-WX54

Label and Location Size: L: 2.0cm*W: 1.0cm Label and Location FCC ID:OQ5-WX54

FCC ID: OQ5-WX54 Internal Photos of the EUT FCC ID: OQ5-WX54 FCC ID: OQ5-WX54 ANT FCC ID: OQ5-WX54

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn RF Exposure evaluation Report Reference No. .................... : FCC ID. ........................................... : CTA26040701502 OQ5-WX54 Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Ace Chai Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : Apr. 17, 2026 Testing Laboratory Name ............. : Shenzhen CTA Testing Technology Co., Ltd. Address ........................................... : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Applicant’s name ........................... : CAD Audio, LLC Address ........................................... : 154 Woodlawn Rd Suite C Berlin, CT 06037 Standard .......................................... : 47CFR §1.1310 47CFR §2.1093 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purpses as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : UHF Wireless Transmitter Trade Mark ........................................ CAD AUDIO Manufacturer .................................... : CAD Audio, LLC Model/Type reference ...................... : WX54 Listed Models ................................... : WX50, WX52HW, WX52 Rating ............................................... : DC 3.0V From battery Result ............................................... : PASS Report No.: CTA26040701502 Page 2 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : UHF Wireless Transmitter Model /Type : WX54 Series Model : WX50, WX52HW, WX52 Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. Applicant : CAD Audio, LLC Address : 154 Woodlawn Rd Suite C Berlin, CT 06037 Manufacturer : CAD Audio, LLC Address : 154 Woodlawn Rd Suite C Berlin, CT 06037 Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA26040701502 Page 3 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ............................................................................................................ 4 2 SUMMARY .......................................................................................................................... 5 2.1 General Remarks ..................................................................................................... 5 2.2 Product Description ................................................................................................. 5 2.3 Special Accessories ................................................................................................. 5 2.4 Modifications ............................................................................................................ 5 3 TEST ENVIRONMENT ....................................................................................................... 6 3.1 Address of the test laboratory .................................................................................. 6 3.2 Test Facility .............................................................................................................. 6 3.3 Statement of the measurement uncertainty ............................................................. 6 4 Test limit .............................................................................................................................. 7 4.1 Requirement ............................................................................................................ 7 4.2 EIRP Power Results ................................................................................................ 7 4.3 Manufacturing tolerance .......................................................................................... 7 4.4 Evaluation Result ..................................................................................................... 8 4.5 Simultaneous Transmission for SAR Exclusion ...................................................... 8 5 Conclusion ........................................................................................................................... 8 Report No.: CTA26040701502 Page 4 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 1 T E S T S T A N D A R D S The tests were performed according to following standards: ANSI C95.1–1999: IEEE Standard for Safety Lev…

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1. Antenna Description: Antenna type PCB antenna Model WX54 Frequency range 550.5-583.5MHz Manufacturer CAD Audio, LLC Address 154 Woodlawn Rd Berlin CT 06037 United States Of America ANT Peak Gain 0.70 dBi 2. Antenna Photo:

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART CTEST REPORT FCC PART 15.236 Report Reference No. .................... : FCC ID. ............................................ : CTA26040701501 OQ5-WX54 Compiled by ( position+printedname+signature) .. : File administrators Zoey Cao Supervised by (position+printedname+signature) ... : Project Engineer Ace Chai Approved by (position+printedname+signature) ... : RF Manager Eric Wang Date of issue .................................... : Apr. 17, 2026 Testing Laboratory Name ............. : Shenzhen CTA Testing Technology Co., Ltd. Address ............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Applicant’s name ........................... : CAD Audio, LLC Address ............................................ : 154 Woodlawn Rd Suite C Berlin, CT 06037 Test specification ........................... : Standard ........................................... : FCC Part 15.236 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : UHF Wireless Transmitter Trade Mark ....................................... : CAD AUDIO Manufacturer .................................... : CAD Audio, LLC Model/Type reference ...................... : WX54 Listed Models ................................... : WX50, WX52HW, WX52 Modulation Type ............................... : FM Operation Frequency ....................... : 550.5-583.5MHz Rating ............................................... : DC 3.0V From battery Result ............................................... : PASS Report No.: CTA26040701501 Page 2 of 31 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : UHF Wireless Transmitter Model /Type : WX54 Series Model : WX50, WX52HW, WX52 Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number and colour is different for these model. Applicant : CAD Audio, LLC Address : 154 Woodlawn Rd Suite C Berlin, CT 06037 Manufacturer : CAD Audio, LLC Address : 154 Woodlawn Rd Suite C Berlin, CT 06037 Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory Report No.: CTA26040701501 Page 3 of 31 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 T E S T S T A N D A R D S ................................................................. 4 2 S U M M A R Y ............................................................................ 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Equipment Under Test 5 2.4 Short description of the Equipment under Test (EUT) 5 2.5 EUT configuration 5 2.6 EUT operation mode 6 2.7 Block Diagram of Test Setup 6 2.8 Related Submittal(s) / Grant (s) 7 2.9 Modifications 7 3 T E S T E N V I R O N M E N T .............................................................. 8 3.1 Address of the test laboratory 8 3.2 Test Facility 8 3.3 Environmental conditions 8 3.4 Summary of measurement results 8 3.5 Statement of the measurement uncertainty 9 3.6 Equipments Used during the Test 10 4 T E S T C O N D I T I O N S A N D R E S U L T S ........................................... 12 4.1 AC Power Conducted Emission 12 4.2 Maximum Output Power 13 4.3 Occupied Bandwidth 15 4.4 Necessary Bandwidth 17 4.5 Transmitter spurious emissions 19 4.6 Frequency Stability 23 5 T E S T S E T U P P H O T O S O F T H E E U T ......................................... 25 6 P H O T O S O F T H E E U T ........................................................... 26 Report No.: CTA26040701501 Page 4 of 31 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 1 T E S T S T A N D A R D S The tests were performed according to following standards: FCC Rules Part 15.236: Operation of wireless microphones in the bands 54-72 MHz, 76-88 MHz, 174-216 MHz, 470-608 MHz and 614-698 MHz. ANSI C63.10-2020 +Cor. 1-2023+ C63.10a-2024+ Errata to C63.10a-2024: American National Standard for Testing Unlicensed Wireless Devices Report No.: CTA26040701501 Page 5 of 31 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 2 S U M M A R Y 2.1 General Remarks Date of receipt of test sample : Apr. 07, 2026 Testing commenced on : Apr. 07, 2026 Testing concluded on : Apr. 17, 2026 2.2 Product Description Product Name: UHF Wireless Transmitter Model/Type reference: WX54 Power supply: D…

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FCC ID: OQ5-WX54 Test Setup Photos of the EUT