2AZ7E-XF-MBX-0A2AZ7E-XF-MBX-0A

NV Mask Portable air purifler XF-MBX-0A Shanghai Xunfeng Biological Techology Co.,Ltd CONTENTS I Instructions ..................................................................................................................................................1 II Safety Information ..................................................................................................................................... 1 III Product Parameter .................................................................................................................................. 4 IV Features ......................................................................................................................................................... 4 V Supplied Accessories ............................................................................................................................. 5 VI Installation Requirements ......................................................................................................................... 5 VII How to Use ................................................................................................................................................. 5 VIII Operating Instructions .......................................................................................................................... 7 IX WeChat Mini Program ........................................................................................................................ 9 X Filter Replacement ............................................................................................................................... . 9 XI Cleaning Method ................................................................................................................................... 11 XII Harmful Substances and Recycling ........................................................................................... .. 12 XIII Common problems and solutions .............................................................................................. .12 XIV Quality Assurance and Product Maintenance ...................................................................... 15 1 Instructions 1. Please read all the information in this manual before operating this equipment and keep this manual as a reference. 2. This equipment can be charged by DC 5V power supply and powered by DC 3.6V lithium- ion battery. If not, please repair or replace it before use. Safety Information Please read, understand and follow all safety information in the manual before use and keep them for future reference. Consequences of Safety Information ⚠Warning: Indicates a hazard with a medium risk that may cause death or serious injury if not avoided ⚠Note: Indicates if not avoided, may result in minor or moderate injury hazard with a low level of risk ⚠ Warni ng Reduce fire and explosion, electrical shock or impact-related risks: Before operating this equipment, please read all instructions, instructions for use and safety information in this product manual, and keep the manual as a reference. Reduce shock-related risks: This equipment is not suitable for people with poor physical, sensory or mental abilities or lack of experience and knowledge (including children), Unless the 2 person responsible for their safety gives them supervision or guidance . Do not let children or pets touch or play with this equipment without supervision. Do not place the product in an unstable position. Reduce the risk of fire, explosion or electric shock: Do not disassemble, modify or repair this product. The user can only replace the filter or clean this product. The special filter is authorized and approved by our company. Do not put any other accessories into the machine.  This equipment can be charged by DC 5V power supply and powered by DC 3.6V lithium-ion battery. Please use a standard power adapter that meets the requirements of this product. Please insert the USB Type-C power adapter correctly and tightly. Reduce fire and explosion related risks: Keep this equipment away from high temperature, heat sources or areas exposed to direct sunlight for a long time. Do not allow any liquid or suspended objects to enter the equipment. Do not store, install or use this equipment in any flammable, explosive or other dangerous environment. ⚠ Note 3 Reduce shock-related risks: Before replacing the filter or cleaning this equipment, please turn off the power, disconnect the power and make sure that the fan is stopped before operation. Do not put anything into the air inlet and outlet of this equipment. Reduce damage to this equipment: Do not bend, pull, twist or bundle the power cord or power plug forcibly. Do not use this equipment when the socket or body is damaged or fails to operate normally. Unplug the power adapter and send it to the authorized repairer to replace the damaged parts. Make sure that the filter has been installed correctly before turn on the power, Do not store, install or use this equipment in a humid environment. Do not touch the USB Type-C power adapter or operate this equipment with wet hands. Do not sit or stand on this equipment, or place heavy objects on it. According to the degree of air pollution and the length of using, the lifetime of the special filter is 4-8 hours. It is recommended that you replace it according to the actual situation to ensure the filtering effect. The filter is disposable and cannot be washed. Please do not try to reuse the filter after cleaning. Please check the air inlet and outlet regularly and keep the machine clean to prevent dust accumulation. 4 Do not block the air inlet and outlet. Properly use and place to avoid falling and collision. Do not hit or scratch the product with sharp objects. When the portable respiratory purifier is not used for a long time, unplug the USB Type-C power adapter. Do not use chemical or abrasive cleaning products to clean the product. Product …

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QA-FR-171-A Company: Shanghai Xunfeng Biological Techology Co.,Ltd Add: Room 427, building 2, No. 857 Tiangong Road, Jinshan Industrial Zone, Shanghai,China Tel: 15900713657 Fax: N/A E-mail: [email protected] FCC Confidential Authorization Date: 2021-02-05 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2AZ7E-XF-MBX-0A In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, Shanghai Xunfeng Biological Techology Co.,Ltd hereby requests long-term confidential treatment of information accompanying this application as outlined below: • Block Diagram • Schematics • Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Signature: Printer Name: YuWei Chen Title ：Manager

EXHIBIT A - EUT EXTERNAL PHOTOGRAPHS

Model:XF-MBX-0A FCC ID:2AZ7E-XF-MBX-0A Shanghai Xunfeng Biological Techology Co.,Ltd Room 427, building 2, No. 857 Tiangong Road, Jinshan IndustriaTl Zone, Shanghai,China

EXHIBIT B - EUT INTERNAL PHOTOGRAPHS PCB Antenna

FCC PART 15.247 TEST REPORT For Shanghai Xunfeng Biological Techology Co.,Ltd Room 427, building 2, No. 857 Tiangong Road, Jinshan Industrial Zone, Shanghai,China FCC ID: 2AZ7E-XF-MBX-0A Report Type: Original Report Product Type: NV Mask Portable air purifler Project Engineer: Miller Xie Report Number: RSHD210505001-00B Report Date: 2021-07-22 Reviewed By: Oscar Ye EMC Manager Prepared By: Bay Area Compliance Laboratories Corp. (Kunshan) No.248 Chenghu Road,Kunshan,Jiangsu province,China Tel: +86-0512-86175000 Fax: +86-0512-88934268 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Kunshan) Report No.: RSHD210205001-00B FCC Part 15.247 Page 2 of 39 TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 OBJECTIVE ................................................................................................................................................................... 4 RELATED SUBMITTAL(S)/GRANT(S) ............................................................................................................................. 4 TEST METHODOLOGY .................................................................................................................................................. 4 MEASUREMENT UNCERTAINTY .................................................................................................................................... 5 TEST FACILITY ............................................................................................................................................................. 5 SYSTEM TEST CONFIGURATION .......................................................................................................................... 6 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 6 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 6 EUT EXERCISE SOFTWARE .......................................................................................................................................... 6 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 7 EXTERNAL I/O CABLE .................................................................................................................................................. 7 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 8 SUMMARY OF TEST RESULTS ............................................................................................................................. 10 TEST EQUIPMENT LIST ......................................................................................................................................... 11 FCC§15.247 (I), §1.1310 &§2.1093 –RF EXPOSURE .............................................................................................. 12 MEASUREMENT RESULT ............................................................................................................................................ 12 FCC §15.203 - ANTENNA REQUIREMENT ........................................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 13 FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS ..................................................................................... 14 APPLICABLE STANDARD ............................................................................................................................................ 14 EUT SETUP ................................................................................................................................................................ 14 EMI TEST RECEIVER SETUP ....................................................................................................................................... 14 TEST PROCEDURE ...................................................................................................................................................... 15 CORRECTED FACTOR & OVER LIMIT CALCULATION .................................................................................................. 15 TEST RESULTS SUMMARY .......................................................................................................................................... 15 TEST DATA ................................................................................................................................................................ 15 FCC §15.209, §15.205 & §15.247(d) - SPURIOUS EMISSIONS ............................................................................. 18 APPLICABLE STANDARD ............................................................................................................................................ 18 EUT SETUP ................................................................................................................................................................ 18 EMI TEST RECEIVER SETUP ....................................................................................................................................... 19 TEST PROCEDURE ......................................................…

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EXHIBIT C - TEST SETUP PHOTOGRAPHS Conducted Emissions (Front View) Conducted Emissions (Side View) Radiated Emissions (Below 1GHz) Radiated Emissions (Above 1GHz)