2BTKS-OPAHXOPAH X Heating Vest Wristband Controller

User Manual OPAH X OPAH X Heating Vest Wristband Controller SPECIFICATION • Made of 80% neoprene 10% spandex 5% nylon 5% polyurethane. • Resistance heating source. • Maximum 50Watt heating power. • Two levels of heating power selction. • Thermal protection temperature around 40°C/104°F • Run time: 1-2 hours • Wireless wristband: 2 years usetime with non-chargeble battery • Depth rating: 50m/164ft THANKS FOR CHOOSING US Thank you for choosing AKUANA Opah X Heated Vest. The special designed product can reach a depth limit of 50m which will meet most requirement of water sports. The wireless operating solution makes the Opah heated vest can be controlled remotely around 50cm by the wireless wirstband. A maximum 50W of power can signicant improve the user experience and extend the limit of recreational activities. WHAT’S IN THE BOX • Suit x 1 • Battery x 2 • Charger x 1 • Wireless wristband x 1 drawing (1) drawing (2) Charge the battery • Charge the battery before use. • Plug in the connectors as shown in drawing (1). • Plug your charger into an electric outlet with the electricity range of 100V-240V, 50/60Hz, AC current. • The charger indicator will display red when charging and will display green when complete. • When the battery(ies) is reaching full state, the charger indicator may change between RED and GREEN status. Wear the suit • The Opah heated vest need to be worn under an isolation layer such as wetsuit or drysuit to ensure function properly. • Plug connector together tightly as shown in ç. • Place the battery in the battery pocket before wearing up. • Stretch the cables well and store them neatly. • Wear right hand through the vest rst, then gently put on the vest from you neck. Tight the velco on the right side lately. • Wrap the wristband controller up securely on your wrist. The wristband controller is the only device to turn on/o the suit. Please store it securely after each use. Heat Levels Low: maxium 30W of heating power High: maxium 60W of heating power The user can select each heating level according to the surrouding environment and his/her own favor. OPERATION INSTRUCTIONS Turn on/o heating function and vibration indication WASH AND MAINTENANCE • Hand wash ONLY. • Hang dry ONLY. • Before washing, REMOVE THE BATTERY from the vest. • Use ush water to wash batteries ONLY. • MUST turn of the battery before washing(LED o ). Battery Connected Low Level High Level Standby Wristband Short press button Vibration 1.5s 0.5s once 0.5s twice 1.5s First battery connected to vest Short press button Long press button Function Warnings and Important Instructions Thank you for choosing the AKUANA Heating Vest. To ensure optimal performance and safety, please carefully read and retain the following instructions: • This product is designed for use only inside a wetsuit while diving. • Keep batteries out of reach of children at all times. • The batteries are rechargeable. Only use the charger provided with the product. • The battery charger supports an input range of 100V-240V, 50/60Hz AC power. • When the vest is not in use for an extended period, disconnect the battery to avoid battery drain. • This product should be hand washed only. Always remove the batteries before washing the vest. • Clean the batteries with fresh water only. • Ensure the batteries are turned o (LED o ) before rinsing. Failing to do so may result in permanent battery damage. • Do not disassemble or modify the vest, battery, or cables. • Do not use other heating sources that are not compati- ble with this product. • Make sure the cables are properly stretched and positioned beneath your wetsuit. • Before each dive, thoroughly inspect all electrical cords and connections. If you nd any cuts, breaks, or damage, do not use the vest as it may cause serious injury. • If any cable damage is detected, contact authorized service for repair or replacement before further use. IMPORTANT SAFETY INSTRUCTIONS: Suit is supplied with the following products and only these products should be used with the suit. Lithium Battery Models: OPB01/OPB02 Main Charger Model XSG1263000 EMC Suits are not suitable for people with Pacemakers. EMI may aect pacing devices so we strongly recommend that you do not use if you have one of these devices. Thermal protection Although the product is designed with thermal protection, the user is also responsible for own thermal protection. Isolation depends on the right wetsuit and thermal under- wear selection. Lack of right thermal protection might cause thermoregulatory disorders. The user must be aware of the risks of hyperthermia and hypothermia. Thermal isolation and depth Thermal isolation is reduced due to hydrostatic pressure, which is increasing with depth. The user must be aware that thermal capacity of the product might be reduced. Allergic reaction Every synthetic material might cause allergic reactions. Before using the product, please be aware of the potential risk ofexperiencing allergy towards the materials used in the construction of the product. 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 part…

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Shenzhen Yiru Diving Equipment Company Covered Equipment Certification Attestation Letter 11/30/2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BTKS-OPAHX Shenzhen Yiru Diving Equipment Company (“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. Shenzhen Yiru Diving Equipment Company (“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. Shenzhen Yiru Diving Equipment Company (“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). <Signature>: Name: Jack Bu Title: Manager Company: Shenzhen Yiru Diving Equipment Company Date: 11/30/2025

Shenzhen Yiru Diving Equipment Company * the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. U.S. Agent Designation for Service of Process - Certification Attestation Letter 11/30/2025 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2BTKS-OPAHX FRN of applicant: 0037726643 Per section 2.911(d)(7) of the FCC rules, [Shenzhen Yiru Diving Equipment Company] (“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: Akuana America FCC Registration Number (FRN): 0037612181 Physical U.S. Company Address: 23755 Little Quail Ave Diamond Bar, CA 91765 United States Contact Person: Philip Fu Agent Email Address: [email protected] The above contact person accepts the obligation for service of process. The applicant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Signed: Signed: Printed name: Jack bu Title: Manager Company Name: Shenzhen Yiru Diving Equipment Company Date: 11/30/2025 Agent Signed (if different from Applicant): Signed: Printed name: Philip Fu Title: CEO Company Name: Akuana America Date: 11/30/2025

Shenzhen Yiru Diving Equipment Company 2025-11-30 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BTKS-OPAHX Product Name: OPAH X Heating Vest Wristband Controller 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: Jack Bu Title: Manager Company: Shenzhen Yiru Diving Equipment Company

Shenzhen Yiru Diving Equipment Company 2025-11-30 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen DL Testing Technology Co., Ltd.（101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, 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 Shenzhen Yiru Diving Equipment Company（Room 705, Building 4B, Huaqiang idea park, Feng'en Road, Guangming district, Shenzhen, Guangdong, China） <Signature>: Name: Jack Bu Title: Manager Company: Shenzhen Yiru Diving Equipment Company

Shenzhen Yiru Diving Equipment Company 2025-11-30 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: Jack Bu Title: Manager Company: Shenzhen Yiru Diving Equipment Company

Shenzhen Yiru Diving Equipment Company FCC ID: 2BTKS-OPAHX Product Similarity Declaration Applicant: Shenzhen Yiru Diving Equipment Company Address: Room 705, Building 4B, Huaqiang idea park, Feng'en Road, Guangming district, Shenzhen, Guangdong, China Manufacturer: Shenzhen Yiru Diving Equipment Company Address: Room 705, Building 4B, Huaqiang idea park, Feng'en Road, Guangming district, Shenzhen, Guangdong, China Product Name: OPAH X Heating Vest Wristband Controller Trade Mark: AKUANA Model Number: OPAH X, OPAH X MAX, OPAH X PRO, OPAH X DS We (Shenzhen Yiru Diving Equipment Company) hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), All models are the same as the samples except for the model name, appearance color. <Signature>: Name: Jack Bu Title: Manager Company: Shenzhen Yiru Diving Equipment Company

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(External Photos) Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

Size: 15*11mm Model.: OPAH X FCC ID: 2BTKS-OPAHX Label location

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(Internal Photos) ANT Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

FCC ID: 2BTKS-OPAHX RF Exposure Evaluation According to KDB 447498 D01 V06 and part 2.1093，Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f (GHz) ] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, where f (GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison EIRP=E Meas +20log(d Meas )-104.7 EIRP is the equivalent isotropically radiated power, in dBm E Meas is the field strength of the emission at the measurement distance, in dBμV/m d Meas is the measurement distance, in m Here, Field strength (dBuV/m) EIRP (dBm) Max tune-up (mW) Frequency (MHz) Min. distance(mm) Calc. thresholds limit 86.06 -9.1 0.123 0.125 5 0.0003 3.0 So a SAR test is not required

产品承认书 SPECIFICATION 客户 Customer 客户料号 Customer Part Number 产品编号 Part Number 产品描述 Product Description 版本号 Edition 2*3.5*24-500J 磁棒天线 2*3.5*24 批准 Approval 制作 Design 贺冠程周英 ZSUCORE ELECTRONIC Co.,Ltd 供应商 Supplier 审核 Check 李娜 客户 Customer 批准 Approval 1.Dimensions s ( unit: mm) 2.Electrical Parameters ZSUCORE ELECTRONIC Co.,Ltd 500uH（TYP） 125K 40 ºC ~85 ºC 40 ºC ~85 ºC A:3.5MM B:24MM C:4MM D:30MM±0.5 E:3MM±0.3 F：0.2MM Inductance L F Working Temperature Storage Temperature 3. Details The antenna 2*3.5*24-500J is designed for emission of a LF field to allow hands free access towards the Customer Device Identification for automotive application. This type antenna are inserted in the vehicle being integrated into the Access and Start Hand Free subsystem for requirements Passive Entry and Remote keyless Go System. Housing plastic base Polyamide (ABS optional) assuring extreme conditions of humidity, liquids, substance and extreme environments. The connector is optional and it can be customized to required features. It can be sealed or unsealed with 2P, 3P,...,6P male or female and located outside the assembly of the antenna with 2 cables type SCA 105ºC. Inside of the housing plastic base the serial inductance, capacitance and resistance can be customized to required values. Designed to allow long emitting-reading distances in the smallest volume. Variety of mounting requirements and solutions which to incorporate features to accommodate different fastening anchors and mechanical robustness.Nomenclature description: The specification chart is a reference guide for the most common required values at working frequencies of 125 kHz, 20 kHz and 134.2 kHz. Any other inductance value at LF or tighter tolerances can be provided. Please contact our sales deparment for any inquiry. ZSUCORE ELECTRONIC Co.,Ltd

Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251125033R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 19 Test Report FCC ID: 2BTKS-OPAHX Applicant: Shenzhen Yiru Diving Equipment Company Address: Room 705, Building 4B, Huaqiang idea park, Feng'en Road, Guangming district, Shenzhen, Guangdong, China Manufacturer: Shenzhen Yiru Diving Equipment Company Address: Room 705, Building 4B, Huaqiang idea park, Feng'en Road, Guangming district, Shenzhen, Guangdong, China Product Name: OPAH X Heating Vest Wristband Controller Trade Mark: AKUANA Model Number: OPAH X, OPAH X MAX, OPAH X PRO, OPAH X DS Date of Receipt: Nov. 25, 2025 Test Date: Nov. 25, 2025 - Dec. 03, 2025 Date of Report: Dec. 03, 2025 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China Applicable Standards: FCC PART 15 C 15.209 ANSI C63.10:2020 Test Result: Pass Report Number: DLE-251125033R Prepared (Test Engineer): Alisa Song Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251125033R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 19 Table of Contents Page 1. SUMMARY OF TEST RESULTS ................................................................................ 4 MEASUREMENT UNCERTAINTY ..................................................................................... 4 2. GENERAL INFORMATION ........................................................................................ 5 2.1 GENERAL DESCRIPTION OF EUT ............................................................................ 5 2.2 DESCRIPTION OF TEST MODES ............................................................................... 5 2.3 BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED ......... 6 2.4 DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) .................................. 6 2.5 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING .................................. 6 2.6 EQUIPMENTS LIST FOR ALL TEST ITEMS ............................................................ 7 3. EMC EMISSION TEST ............................................................................................... 8 3.1 CONDUCTED EMISSION MEASUREMENT ............................................................... 8 POWER LINE CONDUCTED EMISSION Limits .......................................................... 8 TEST PROCEDURE ..................................................................................................... 8 DEVIATION FROM TEST STANDARD ........................................................................ 8 TEST SETUP ............................................................................................................... 9 EUT OPERATING CONDITIONS ................................................................................. 9 TEST RESULTS ........................................................................................................... 9 3.2 RADIATED EMISSION MEASUREMENT ................................................................. 10 RADIATED EMISSION LIMITS .................................................................................. 10 TEST PROCEDURE ................................................................................................... 11 DEVIATION FROM TEST STANDARD ...................................................................... 11 TEST SETUP ............................................................................................................. 12 EUT OPERATING CONDITIONS ............................................................................... 13 TEST RESULTS (BETWEEN 9KHZ – 30 MHZ) ......................................................... 14 TEST RESULTS (BETWEEN 30MHZ – 1GHZ) .......................................................... 15 4. BANDWIDTH TEST ................................................................................................. 17 APPLIED PROCEDURES / LIMIT ................................................................................... 17 TEST PROCEDURE ................................................................................................... 17 DEVIATION FROM STANDARD ................................................................................ 17 TEST SETUP ............................................................................................................. 17 TEST RESULTS ......................................................................................................... 18 5. ANTENNA REQUIREMENT ..................................................................................... 19 STANDARD REQUIREMENT .......................................................................................... 19 EUT ANTENNA ............................................................................................................... 19 6. TEST SEUUP PHOTO ............................................................................................. 19 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251125033R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 19 Table of Contents Page 7. EUT PHOTO............................................................................................................. 19 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-251125033R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 19 1.1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.231) , Subpart…

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Shenzhen DL Testing Technology Co., Ltd. EUT TEST PHOTO Radiated Measurement Photos ※※※※※ END OF REPORT ※※※※※