2BTNQYX-SHEER-PPPAir purifier

AIR PURIFIER OPERATION MANUAL Product Name Product Model Air purifier Product dimensions176*127*246mm Rated power 0.83kg 10W Net weight Basic Parameters SAP2507-1(A)/ SAP2507-1S(A)/SAP2507-1G(A)/ AKJ-HH-057/MB-057 Rated voltageDC5V Key Function Description Timer 1H、2H、4H、8H Upper shell Lower shell Touch buttons Product Introduction Adapter Air inlet Power cord socket Air outlet Height Width Power: Short press to turn on, short press again to turn off. Bluetooth: Long press for 3 seconds to connect Bluetooth, Bluetooth name: SheerAire; There is a prompt sound when the Bluetooth connection is successful. Short pressing the Bluetooth button during playback will increase the volume, and the corresponding "+" in the upper right corner is the function of this button. Press and hold for 3 seconds to exit Bluetooth connection mode. Timer: Short press to turn on, short press to adjust the timer, the adjustment sequence is as follows: 1-2-4-8H - shutdown changes sequentially. Negative ion: Short press to turn on, short press to turn off. Sleep: Short press to turn on, press any key to exit sleep mode. White noise: Long press for 3 seconds to enter white noise mode. During playback, short press the white noise button to reduce volume, corresponding to the function of the "-" button in the upper right corner. Double click the white noise button to enter the white noise audio switching mode, and long press the white noise button for 3 seconds to exit the white noise mode. Night light: Short press to enter the night light mode, with four brightness levels. Short press to adjust the brightness, with the brightness level adjustment sequence being 1-2-3-4 levels. Short press to exit the night light mode, with the brightness level remaining the same each time this function is turned on and off. Vibe: Short press to turn on the atmosphere light, short press to adjust the brightness, there are a total of 4 brightness levels: 1-2-3-4-3-2-1-0, long press for 2 seconds to enter the color adjustment mode, the color adjustment order is blue,purple,red,yellow green,green,ambient lighting mode. The light has a memory function, and each time this function is turned on, the color and brightness of the light remain the same as when it was turned off the previous time. Z Z Z Z + _ 睡眠/Sleep白噪音/White noise夜灯/Night Light氛围灯/Vibe 电源/Power蓝牙/Bluetooth定时/Timer负离子/Negative ion 1H 2H 4H 8H 12 Cautions Prohibited matters Warning Notice When encountering the following general faults, users can troubleshoot on their own. Attention: If any malfunction is found, please shut down immediately to prevent damage to the machine and other hazards. • • • • • • • • • Maintenance and upkeep instructions Common faults and their solutions FaultReason Treatment method Is the power cord plug energized Is the power cord plug loose Is there a cover on the air outlet or inlet Turn on the power Connect the plug properly Turn off the air purifier and remove the cover Unable to power on Low wind output 1. When the product is to be discontinued for a long time, please put it back in the packaging box and store it in a safe and cool place, avoiding direct sunlight. 2. Do not put any accessories that do not belong to this machine into the body. If you encounter any malfunction, please contact our company and do not repair it yourself. This will affect your warranty rights and may even cause permanent product failure. 3. This product cannot replace ventilation fans, vacuum cleaners, or kitchen range hoods. 4.When used together with household gas appliances (such as gas stoves, gas water heaters, etc.), please ventilate to avoid carbon monoxide poisoning. 5. Do not pour liquids or throw powders or small substances into the product through the air outlet. 6. Do not bring hair, fabrics, etc. close to the product to avoid getting caught up or blocking the air inlet and outlet holes. 7. Do not sit or tilt the product. 8.Regularly cleaning the dust, hair, and impurities on the surface of the filter is beneficial for reducing bacterial growth. This product is not suitable for children, people with disabilities, individuals with mental illnesses, or those lacking relevant experience or knowledge to operate. Unless they are under supervision and ensure their safety, please ensure that children do not use the product as a toy. 1. Users are prohibited from disassembling the machine for maintenance without authorization. If necessary, please contact the manufacturer for repair and replacement. 2. It is prohibited to use gasoline, alcohol, or other flammable cleaning agents for product cleaning to avoid causing fires. 3. It is prohibited to use in environments where flammable and explosive materials are stored. During use, do not approach hot or high-temperature objects to avoid causing explosions. 4. It is prohibited to insert any part of the body or other objects into the air outlet of the machine to avoid personal injury or damage to the machine. 5. It is prohibited to use wet hands to switch power or move products. Hands should be kept dry to avoid electric shock. 6. It is forbidden to block the air inlet and outlet holes during use to avoid damage caused by overheating of the machine. 7. Do not approach soft objects such as curtains, and ensure that there is a 30cm space distance near the machine. 8. It is prohibited to disassemble or modify the product without authorization. 9. It is prohibited to use it outdoors or on damp ground to reduce the risk of electric shock. 1. Before cleaning or maintaining this product, it must be disconnected from the power supply to avoid unnecessary danger. 2. When the product is temporarily suspended, repaired, or personnel leave, please disconnect the power supply in a timely manner. 3. When the product has an odor or abnormal noise, please immediately disconnect the power and contact the after-sales point. 4. When disconnecting the power supply, please do not drag the power cord. Instead, grip the power plug and pull it off w…

Text truncated - open the document above for the full version.

Kunshan Hung Hsing Electric Co.,Ltd. * 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 12/17/2025 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2BTNQYX-SHEER-PPP FRN of applicant: 0037746823 Per section 2.911(d)(7) of the FCC rules, Kunshan Hung Hsing Electric Co.,Ltd. (“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: EMCTEK FCC Registration Number (FRN): 0037012671 Physical U.S. Company Address: 11788 Big Canyon Lane San Diego, CA 92131 United States Contact Person: Fang Liu 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: Naiping Feng Title: Maneger Company Name: Kunshan Hung Hsing Electric Co.,Ltd. Date: 12/17/2025 Agent Signed (if different from Applicant): Signed: Printed name: Fang Liu Title: Manager Company Name: EMCTEK Date: 12/17/2025

Kunshan Hung Hsing Electric Co.,Ltd. Covered Equipment Certification Attestation Letter 12/23/2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BTNQYX-SHEER-PPP Kunshan Hung Hsing Electric Co.,Ltd. (“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. Kunshan Hung Hsing Electric Co.,Ltd. (“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. Kunshan Hung Hsing Electric Co.,Ltd. (“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: Naiping Feng Title: Manager Company Name: Kunshan Hung Hsing Electric Co.,Ltd. Date: 12/23/2025

DATE: 2025.12.17 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint CTC Laboratories, Inc., Room 107, 108, 207, 208, 303 of Building A, Room 101 of Building B, No.7, Lanqing 1st Road, Luhu Community, Guanhu Subdistrict, Longhua District, Shenzhen, Guangdong, 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 Kunshan Hung Hsing Electric Co.,Ltd., No.78, Yuan Feng Rd, Yu Shan Town, Kun Shan City, Jiangsu China (Applicant Name and address) <Signature> Name: Naiping Feng Title: Manager Company: Kunshan Hung Hsing Electric Co.,Ltd.

DATE: 2025.12.17 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: __2BTNQYX-SHEER-PPP__ Product Name: __Air purifier__ 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: Naiping Feng Title: Manager Company: Kunshan Hung Hsing Electric Co.,Ltd.

Date: 2025.12.17 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: Naiping Feng Title: Manager Company: Kunshan Hung Hsing Electric Co.,Ltd.

CTC Laboratories, Inc. Room 107, 108, 207, 208, 303 of Building A, Room 101 of Building B, No.7, Lanqing 1st Road, Luhu Community, Guanhu Subdistrict, Longhua District, Shenzhen, Guangdong, China Tel: +86-755-27521059 Fax: +86-755-27521011 http://www.sz-ctc.org.cn Page 1 of 4 External Photographs Page 2 of 4 Page 3 of 4 Page 4 of 4

Label Label Location 1. Product Name: Air purifier Product Model: SAP2507-1 (A) Input: DC5V 2A FCC ID: 2BTNQYX-SHEER-PPP Kunshan Hung Hsing Electric Co.,Ltd. No.78, Yuan Feng Rd, Yu Shan Town, Kun Shan City, Jiangsu China

CTC Laboratories, Inc. Room 107, 108, 207, 208, 303 of Building A, Room 101 of Building B, No.7, Lanqing 1st Road, Luhu Community, Guanhu Subdistrict, Longhua District, Shenzhen, Guangdong, China Tel: +86-755-27521059 Fax: +86-755-27521011 http://www.sz-ctc.org.cn Page 1 of 5 Internal Photographs Page 2 of 5 Page 3 of 5 BT Antenna Page 4 of 5 Page 5 of 5

Page 1 of 2 Report No.: CTC2025757503 CTC Laboratories, Inc. Room 107, 108, 207, 208, 303 of Building A, Room 101 of Building B, No.7, Lanqing 1st Road, Luhu Community, Guanhu Subdistrict, Longhua District, Shenzhen, Guangdong, China Tel.: (86)755-27521059 Fax: (86)755-27521011 Http://www.sz-ctc.org.cn TRF No：CTC-TR-066_A2 For anti-fake verification, please visit the official website of China Inspection And Testing Society : yz.cncaq.com Maximum Permissible Exposure Evaluation FCC ID: 2BTNQYX-SHEER-PPP According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) Radiation as specified in §1.1307(b). EUT Specification Product Name: Air purifier Trade Mark: / Model/Type Reference: SAP2507-1(A) Listed Model(s): SAP2507-1G(A), SAP2507-1S(A), AKJ-HH-057, MB-057 Model Differences: All these models are identical in the same PCB, layout, electrical circuit and enclosure. The difference is the model name. Frequency Band (Operating) BT: 2402MHz ~ 2480MHz Device Category Portable (<5mm separation) Mobile (>20cm separation) Fixed (>20cm separation) Others ___ Exposure Classification Occupational/Controlled exposure (S=5mW/cm 2 ) General Population/Uncontrolled exposure (S=1mW/cm 2 ) Antenna Diversity Single antenna Multiple antennas TX diversity RX diversity TX/RX diversity Antenna Gain (Max) -0.59dBi Evaluation Applied MPE Evaluation SAR Evaluation Page 2 of 2 Report No.: CTC2025757503 CTC Laboratories, Inc. Room 107, 108, 207, 208, 303 of Building A, Room 101 of Building B, No.7, Lanqing 1st Road, Luhu Community, Guanhu Subdistrict, Longhua District, Shenzhen, Guangdong, China Tel.: (86)755-27521059 Fax: (86)755-27521011 Http://www.sz-ctc.org.cn TRF No：CTC-TR-066_A2 For anti-fake verification, please visit the official website of China Inspection And Testing Society : yz.cncaq.com Limits for Maximum Permissible Exposure (MPE) Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Averaging Time (minutes) (A) Limits for Occupational/Controlled Exposure 300-1500 -- -- F/300 <6 1500-100000 -- -- 5 <6 (B) Limits for General Population/Uncontrolled Exposure 300-1500 -- -- F/1500 <30 1500-100000 -- -- 1 <30 Calculation Method Friis transmission formula: Pd=(P out *G)/(4*Pi*R 2 ) Where: Pd= Power density in mW/cm 2 P out = output power to antenna in mW G= gain of antenna in linear scale Pi= 3.1416 R= distance between observation point and center of the radiator in cm Pd limit of MPE is 1mW/cm 2 . If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. Measurement Result Mode Frequency (MHz) Antenna Gain (dBi) Maximum Power (dBm) Tune Up Tolerance (dB) Max. Tune Up Power (dBm) Power Density at 20cm (mW/cm 2 ) Limit (mW/cm 2 ) BLE 2402 -0.59 -3.43 ±1 -2.50 0.0001 1 EDR 2402 -0.59 -2.75 ±1 -2.00 0.0001 1 Note: 1. Calculate in the worst-case mode. 2. Max. Tune Up Power is declared by manufacturer, and used to calculate. 3. For a more detailed features description, please refer to the RF Test Report. **********************THE END**********************

CTC Laboratories, Inc. $CNAS$ CTC Laboratories, Inc. Room 107, 108, 207, 208, 303 of Building A, Room 101 of Building B, No.7, Lanqing 1st Road, Luhu Community, Guanhu Subdistrict, Longhua District, Shenzhen, Guangdong, China Tel.: (86)755-27521059 Fax: (86)755-27521011 Http://www.sz-ctc.org.cn TRF No：CTC-TR-059_A2 For anti-fake verification, please visit the official website of China Inspection And Testing Society : yz.cncaq.cn TEST REPORT Report No. .................................... : CTC2025757502 FCC ID ........................................... : 2BTNQYX-SHEER-PPP Applicant ...................................... : Kunshan Hung Hsing Electric Co.,Ltd. Address .......................................... : No.78, Yuan Feng Rd, Yu Shan Town, Kun Shan City, Jiangsu China Manufacturer 1................................: Kunshan Hung Hsing Electric Co.,Ltd. Address 1........................................: No.78, Yuan Feng Rd, Yu Shan Town, Kun Shan City, Jiangsu China Manufacturer 2................................: Zhejiang Howell Illuminating Technology Co., Ltd. Address 2........................................: No. 1228 Tanjialing West Road, Lanjiang District, YUYAO Zhejiang, 315400 Product Name .............................. : Air purifier Trade Mark .................................... : / Model/Type reference .................... : SAP2507-1(A) Listed Model(s) .............................. : SAP2507-1G(A), SAP2507-1S(A), AKJ-HH-057, MB-057 Standard ....................................... : FCC CFR Title 47 Part 15 Subpart C Section 15.247 Test Report Form No ..................... : CTC-TR-059_A2 Master TRF .................................... : Dated 2025-05-12 Date of receipt of test sample........: Dec. 1, 2025 Date of testing..............................: Dec. 1, 2025 ~ Dec. 12, 2025 Date of issue................................: Dec. 31, 2025 Result............................................: PASS Compiled by: (Printed name+signature) Jim Jiang Supervised by: (Printed name+signature) Eric Zhang Approved by: (Printed name+signature) Totti Zhao $英文检测章$ $Totti$ This test report may be duplicated completely for legal use with the approval of the applicant. It should not be reproduced except in full, without the written approval of our laboratory. The client should not use it to claim product endorsement by CTC. The Test Result in the report only apply to the tested sample. The test report shall be invalid without all the signatures of testing engineers, reviewer and approver. Any objections must be raised to CTC within 15 days since the date when the report is received. It will not be taken into consideration beyond this limit. Page 2 of 77 Report No.: CTC2025757502 CTC Laboratories, Inc. Room 107, 108, 207, 208, 303 of Building A, Room 101 of Building B, No.7, Lanqing 1st Road, Luhu Community, Guanhu Subdistrict, Longhua District, Shenzhen, Guangdong, China Tel.: (86)755-27521059 Fax: (86)755-27521011 Http://www.sz-ctc.org.cn TRF No：CTC-TR-059_A2 For anti-fake verification, please visit the official website of China Inspection And Testing Society : yz.cncaq.cn Table of Contents Page 1. TEST SUMMARY ....................................................................................................................................................... 3 1.1. TEST STANDARDS .......................................................................................................................................................... 3 1.2. REPORT VERSION ......................................................................................................................................................... 3 1.3. TEST DESCRIPTION ........................................................................................................................................................ 4 1.4. TEST FACILITY .............................................................................................................................................................. 5 1.5. MEASUREMENT UNCERTAINTY ........................................................................................................................................ 6 1.6. ENVIRONMENTAL CONDITIONS ........................................................................................................................................ 6 2. GENERAL INFORMATION .......................................................................................................................................... 7 2.1. CLIENT INFORMATION ................................................................................................................................................... 7 2.2. GENERAL DESCRIPTION OF EUT ...................................................................................................................................... 7 2.3. ACCESSORY EQUIPMENT INFORMATION ............................................................................................................................ 8 2.4. OPERATION STATE ........................................................................................................................................................ 9 2.5. MEASUREMENT INSTRUMENTS LIST ............................................................................................................................... 10 3. TEST ITEM AND RESULTS ........................................................................................................................................ 12 3.1. CONDUCTED EMISSION................................................................................................................................................ 12 3.2. RADIATED EMISSION ................................................................................................................................................... 15 3.3. BAND EDGE EMISSIONS (RADIATED) .........................................................................…

Text truncated - open the document above for the full version.

Inverted F Antenna Specification Summary ITEM ANT SPEC Model Name 2.4GANT Center Frequency HorizontalVertical 2400MHz2450MHz2500MHz2400MHz2450MHz2500MHz -1.26dBi-0.76dBi-0.59dBi-5.25dBi-2.46dBi-1.86dBi MAX. Gain-0.59dBi Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance 50 Ohm Antenna Length 38.20mm Manufacture Zhongshan Kaijie Technology Co., Ltd. Manufacturer address Booth 6-2, 2nd Floor, Building B, No. 32 Kexi West Road, Torch Development Zone, Zhongshan City, Guangdong Province, China Antenna Photo & Length (mm) Horizontal: 2400 MHz 245 0 MHz 2500 MHz Power(dBm) Max: 0 Min: -40 Scale:5/div Frequency (MHz ) Gain(dBi) Max Min Avg 2400-1.26174-30.0801-7.18716 2450-0.765802-36.5604-7.48023 2500-0.585582-22.0315-6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power(dBm) Max: 0 Min: -30 Scale:5/div Frequency (MHz ) Gain(dBi) Max Min Avg 2400-5.2537-22. 1424-12.4294 2450-2.4652-24.5837-10.4702 2500-1.86120-29.5214-9.20432 ANT Test Labs：AttestationofGlobalComplianceCo., Ltd.

CTC Laboratories, Inc. Room 107, 108, 207, 208, 303 of Building A, Room 101 of Building B, No.7, Lanqing 1st Road, Luhu Community, Guanhu Subdistrict, Longhua District, Shenzhen, Guangdong, China Tel: +86-755- 27521059 Fax: +86-755- 27521011 http://www.sz-ctc.org.cn Page 1 of 2 Radiated Measurements 30MHz-1GHz Above1GHz Page 2 of 2 Conducted Emissions