2BPSB-KF-2507Electric Serum Applicator Device

Product Structure EMS*4 3. Low Batte Reminder When the device is turned on, if the battery is low, the status indicator light and the light wave currently in operation will flash as a reminder. The device will automatically shut down after 5 flashes. Please charge the device in a timely manner. 4. Auto Power-o After the device is turned on, it will automatically shut down after 5 minutes by default if no operations related to the App or skin contact control are performed. 5. Sma Sensing KF-2507 Electric Serum Applicator Device 5.Once the device is detected, the App will display a list of nearby devices. Tap to select "KF-2507" to establish the connection. 6.Once the connection is successful, you will enter the product inteace of the App. First Use Guide 4.E nter the KF-2507 connection page on the App, tap "Connect Now". A prompt requesting permission will pop up; tap "OK" to grant the permission, and then the App will sta searching for nearby devices. Red Light, Blue Light, Red Light + Blue Light / O Light Mode EMS Mode Heating Mode Level 1–8 / O 42°C、45°C、47°C、50°C /O Add:Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone,Heping Community, Fuhai Subdistrict, Bao'an District Shenzhen,China SHENZHEN KIMAIRAY TECHNOLOGY CO., LTD Product Brief I ntroduction This product is an intelligent device integrating APP sma control, automatic liquid dispensing, EMS, light and hot compress functions. It not only suppos the conventional liquid relling method, but also can be directly compatible with single-dose essence ampoules, delivering a scientic skin care experience for you. Hot Compress Area Liquid Outlet Protective Cover Viewing Window (For monitoring the status indicator l ight, charging indicator light and liquid level) Liquid Tank Protective Cover Magnetic Charging Po Liquid Tank / Single-dose Essence Connection Po Liquid Tank Capacity: 3ml This product turns on automatically when the cover is opened, and its working modes are intelligently controlled via the KM Health App. Function Introduction 1. Working Mode Introduction Liquid Dispensing Mode ① Slow Gear: 1ml dispensed per minute (dispensing pauses after 4 minutes of cumulative operation) ② Fast Gear: 2ml dispensed per minute (dispensing pauses after 2 minutes of cumulative operation) ③ O ①The cumulative working time for liquid dispensing will be reset when the device is restaed or a functional mode is changed. ②The settings of EMS, Heating and Liquid Dispensing modes congured in the App will only take eect when the device is in direct contact with the skin. ③Facto Default Settings: Red Light + EMS Level 1 + Slow Liquid Dispensing + Heating at 42°C 2. Indicator Light Introduction (1) Status Indicator Light:The status indicator light ashes for 15 seco nds to prompt the user to peorm a Bluetooth connection after the device is turned on, and then stay on after 15 seconds. (2) Charging Indicator Light:The red light stays on during charging, and the blue light stays on when charging is complete. The settings of EMS, Heating and Liquid Dispensing modes congured in the A pp will only take eect when the hot compress area of the device is in direct contact with the skin. 1. For Android smaphones: Scan the corresponding QR code on the cover of the pr oduct manual, or search for KM Health App in the googleplay store to download and install it. 2. For iOS smaphones: Scan the corresponding QR code on the cover of the product manual, or search for KM Health App in the App Store to download and install it. 3 Turn on Bluetooth on your smaphone. Power on the device (it turns on automatically when . the protective cover is opened). Open the KM Health App, tap the icon for addin g sma devices or the + icon in the upper right corner, and select the model KF-2507. Operating Steps 1.Open the liquid tank cover to pour in liquid, or inse a single-dose essenc e into the liquid tank connection po. 2.Open the protective cover to turn on the device. (The device activates automatically when the protective cover is opened.) 3.Enable Bluetooth on your smaphone and open the KM Health App. Connect the device to your phone, then set your desired skincare mode via the App’s operation inteace.(Please scan the corresponding QR code on the cover of the product manual or search for KM Health App in the app marketplace to download and install it before use.) 4.Press the device’s applicator head rmly against your skin and move it in continuous circular motions or at a constant speed. 5.After use, clean any residual liquid from the liquid outlet tube with a cleaning pin, wipe down other pas of the device, and store it in a well-ventilated, d place. Precautions 1.Do not wash the entire device with water. When cleaning the device body a nd applicator head, avoid using chemical detergents or cleaning products containing mercu, alkali, acid, or other corrosive ingredients. 2.Do not immerse the device in water or place it in humid environments (e.g., bathrooms) to prevent sho circuits. 3.If liquid dispensing becomes clogged during use, unclog the liquid outlet tube with a cleaning pin to restore smooth dispensing. 4.Do not use or store the device in high-temperature environments, as this may cause heat damage. 5.If the device is not in use for an extended period, clean it regularly to maintain hygiene, which ensures its peormance and seice life. Keep the batte level at around 50% and charge/discharge the device periodically to presee batte health. 6.Use only the original charging cable for charging. Avoid using damaged cables and keep the device away from ammable and explosive materials during charging. 7.Do not disassemble, strike, or drop the device. Store it out of the reach of children and pets. 8.When switching to essences of dierent specications or brands, thoroughly clean the liquid tank to avoid interactions between dierent skincare ingredients. 9.This device is not a medical device and cannot be used for disease treatment. C…

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(Shenzhen Kimairay Technology Co.,Ltd.) (2026.2.26) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for(FCC ID: 2BPSB-KF-2507) [Shenzhen Kimairay Technology 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, (Applicant signature) (Applicant printed name) HuaiYu Yi (Shenzhen Kimairay Technology Co.,Ltd.) (2026.2.26) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for(FCC ID: 2BPSB-KF-2507) [Shenzhen Kimairay Technology 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 an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) HuaiYu Yi

Shenzhen Kimairay Technology Co.,Ltd. 2026.2.26 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR EUT NAME: Electric Serum Applicator Device MODEL : KF-2507 FCC ID: 2BPSB-KF-2507 To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : HuaiYu Yi / Project manager Contact information / address: Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone, Heping Community, Fuhai Subdistrict, Bao'an District, Shenzhen, China

Shenzhen Kimairay Technology Co.,Ltd. 2026.2.26 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION EUT NAME: Electric Serum Applicator Device MODEL : KF-2507 FCC ID: 2BPSB-KF-2507 To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Testing Co., Ltd 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). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title : HuaiYu Yi / Project manager Contact information / address: Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone, Heping Community, Fuhai Subdistrict, Bao'an District, Shenzhen, China

External Photos

Size:25*10mm Model: KF-2507 FCC ID: 2BPSB-KF-2507 Label location

Internal Photos Antenna

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. MPE Report Report No.:STS2601397H01 Issued for Shenzhen Kimairay Technology Co.,Ltd. Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone, Heping Community, Fuhai Subdistrict, Bao’an District, Shenzhen, China Product Name: Electric Serum Applicator Device Brand Name: N/A Model Name: KF-2507 Series Model(s): N/A FCC ID: 2BPSB-KF-2507 Test Standards: FCC 47CFR §2.1093 Page 2 of 7 Report No.: STS2601397H01 TEST REPORT Applicant’s Name ................. : Shenzhen Kimairay Technology Co.,Ltd. Address ................................. : Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone, Heping Community, Fuhai Subdistrict, Bao’an District, Shenzhen, China Manufacturer's Name ........... : Shenzhen Kimairay Technology Co.,Ltd. Address ................................. : Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone, Heping Community, Fuhai Subdistrict, Bao’an District, Shenzhen, China Product Description Product Name ........................ : Electric Serum Applicator Device Brand Name .......................... : N/A Model Name .......................... : KF-2507 Series Model(s) ...................... : N/A Test Standards ..................... : FCC 47CFR §2.1093 447498 D01 Interim General RF Exposure Guidance v06 The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd. Date of Test ........................................... : Date of receipt of test item ...................... : 6 Jan. 2026 Date (s) of performance of tests ............. : 6 Jan. 2026 to 29 Jan. 2026 Date of Issue .......................................... : 30 Jan. 2026 Test Result .............................................. : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 7 Report No.: STS2601397H01 TABLE OF CONTENTS 1. GENERAL INFORMATION 5 1.1 GENERAL DESCRIPTION OF THE EUT 5 1.2 TEST FACTORY 5 2. FCC 47CFR §2.1093 REQUIREMENT 6 2.1 TEST STANDARDS 6 2.2 LIMIT 6 2.3 TEST RESULT 7 Page 4 of 7 Report No.: STS2601397H01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 30 Jan. 2026 STS2601397H01 ALL Initial Issue Page 5 of 7 Report No.: STS2601397H01 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name Electric Serum Applicator Device Brand Name N/A Model Name KF-2507 Series Model(s) N/A Model Difference N/A Product Description The EUT is a Electric Serum Applicator Device Operation Frequency: 2402 – 2480 MHz Modulation Type: GFSK Antenna gain: -1.67 dBi Antenna Designation: PCB Antenna Power Rating DC 5V from adapter/DC 3.7V from battery Adapter N/A Battery DC 3.7V Hardware Version N/A Software Version N/A 1.2 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 Page 6 of 7 Report No.: STS2601397H01 2. FCC 47CFR §2.1093 REQUIREMENT 2.1 TEST STANDARDS The limit for Maximum Permissible Exposure (MPE) specified in KDB 447498 D01 General RF Exposure Guidance v06 is followed. The gain of the antennas used in the product is extracted from the Antenna data sheets provided and also the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. Although the Friis Transmission formula is far field assumption, the calculated result of that is an over-prediction for near field power density. It is taken as worst case to specify the safety range. 2.2 LIMIT Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table. Page 7 of 7 Report No.: STS2601397H01 The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. 2.3 TEST RESULT Maximum measured transmitter power. Worst Case Mode frequency Maximum Output Power Tune up tolerance Max Tune up GHz dBm dBm dBm GFSK(BLE) 2.402 0.29 0±1 1 Evaluation Result Mode Frequency Antenna Distance RF output power including tune up (dBm) SAR Test Exclusion Threshold SAR Test Exclusion Estimated SAR GHz mm dBm mw GFSK(BLE) 2.402 5 1 1.259 0.390 Yes / Note: 1. Remark: The worst case gain of the antenna is -1.67dBi. 2. Threshold at which no SAR required is 0.390≤ 3.0 for 1-g SAR, Separation distance ≤ 5mm. ※※※※※END OF THE REPORT※※※※※

ANTENNA SPECIFICATION Specifications Summary ITEM SPEC. Model Name Center Frequency Horizontal Vertical 2402MHz 2441MHz 2480MHz 2402MHz 2441MHz 2480MHz -2.64-1.89-1.67-7.09 -4.70-3.15 MAX. Gain -1.67 dbi Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance 50 Ohm Antenna Length 20mm Manufacture ShenZhen Bokai Circuit Technology co., Ltd. Antenna Photo & Length (mm) Horizontal: 2402MHz 2441MHz 2480MHz Frequency (MHz) Gain(dBi) Max. Min. Avg. 2402 -2.64776 -30.6718 -9.77028 2441 -1.89964 -35.918 -8.87095 2480 -1.66516 -24.7457 -7.99065 Vertical: 2402MHz 2441MHz 2480MHz Frequency (MHz) Gain(dBi) Max. Min. Avg. 2402 -7.09317 -24.1891 -13.5194 2441 -4.7048 -27.8246 -11.666 2480 -3.1576 -29.4867 -10.5684

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Radio Test Report Report No.:STS2601397W01 Issued for Shenzhen Kimairay Technology Co.,Ltd. Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone, Heping Community, Fuhai Subdistrict, Bao’an District, Shenzhen, China Product Name: Electric Serum Applicator Device Brand Name: N/A Model Name: KF-2507 Series Model(s): N/A FCC ID: 2BPSB-KF-2507 Test Standards: FCC Part15.247 Page 2 of 65 Report No.: STS2601397W01 TEST REPORT Applicant’s Name ................. : Shenzhen Kimairay Technology Co.,Ltd. Address ................................. : Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone, Heping Community, Fuhai Subdistrict, Bao’an District, Shenzhen, China Manufacturer's Name .......... : Shenzhen Kimairay Technology Co.,Ltd. Address ................................. : Factory Building No. 5101, Zone 2, Fuqiao Industrial Zone, Heping Community, Fuhai Subdistrict, Bao’an District, Shenzhen, China Product Description Product Name ....................... : Electric Serum Applicator Device Brand Name .......................... : N/A Model Name .......................... : ... : KF-2507 Series Model(s) .................... : N/A Test Standards ..................... : FCC Part15.247 Test Procedure ...................... : ANSI C63.10-2020 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the IC requirements. And it is applicable only to the tested sample identified in the report. The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the Shenzhen STS Test Services Co., Ltd. Date of Test ........................................... : Date of receipt of test item ..................... : 6 Jan. 2026 Date (s) of performance of tests ............. : 6 Jan. 2026 to 29 Jan. 2026 Date of Issue .......................................... : 30 Jan. 2026 Test Result.............................................. : Pass Testing Engineer : (Aaron Bu) Technical Manager : (Skylar Li) Authorized Signatory : (Bovey Yang) Page 3 of 65 Report No.: STS2601397W01 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 9 2.3 TEST SOFTWARE AND POWER LEVEL 10 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 10 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 11 2.6 EQUIPMENTS LIST 12 3. EMC EMISSION TEST 13 3.1 CONDUCTED EMISSION MEASUREMENT 13 3.2 TEST PROCEDURE 14 3.3 TEST SETUP 14 3.4 EUT OPERATING CONDITIONS 14 3.5 TEST RESULTS 15 4. RADIATED EMISSION MEASUREMENT 17 4.1 RADIATED EMISSION LIMITS 17 4.2 TEST PROCEDURE 19 4.3 TEST SETUP 20 4.4 EUT OPERATING CONDITIONS 20 4.5 FIELD STRENGTH CALCULATION 21 4.6 TEST RESULTS 21 5. CONDUCTED SPURIOUS & BAND EDGE EMISSION 32 5.1 LIMIT 32 5.2 TEST PROCEDURE 32 5.3 TEST SETUP 32 5.4 EUT OPERATION CONDITIONS 32 5.5 TEST RESULTS 32 6. POWER SPECTRAL DENSITY TEST 33 6.1 LIMIT 33 6.2 TEST PROCEDURE 33 6.3 TEST SETUP 33 Page 4 of 65 Report No.: STS2601397W01 Table of Contents Page 6.4 EUT OPERATION CONDITIONS 33 6.5 TEST RESULTS 33 7. BANDWIDTH TEST 34 7.1 LIMIT 34 7.2 TEST PROCEDURE 34 7.3 TEST SETUP 34 7.4 EUT OPERATION CONDITIONS 34 7.5 TEST RESULTS 34 8. PEAK OUTPUT POWER TEST 35 8.1 LIMIT 35 8.2 TEST PROCEDURE 35 8.3 TEST SETUP 35 8.4 EUT OPERATION CONDITIONS 35 8.5 TEST RESULTS 35 9. ANTENNA REQUIREMENT 36 9.1 STANDARD REQUIREMENT 36 9.2 EUT ANTENNA 36 APPENDIX 1-TEST DATA 37 APPENDIX 2- EUT TEST PHOTO 65 Page 5 of 65 Report No.: STS2601397W01 Revision History Rev. Issue Date Report No. Effect Page Contents 00 30 Jan. 2026 STS2601397W01 ALL Initial Issue Page 6 of 65 Report No.: STS2601397W01 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/ Part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- Note: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2020. Page 7 of 65 Report No.: STS2601397W01 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.751dB 2 Unwanted Emissions, conducted ±2.888dB 3 All emissions, radiated 9K-30MHz ±2.48dB 4 All emissions, radiated 30M-1GHz ±2.52dB 5 All emissions, radiated 1G-18GHz ±3.48dB 6 All emissions, radiated>18GHz ±4.18dB 7 Conducted Emission (9KHz-150KHz) ±2.48dB 8 Conducted Emission (150KHz-30MHz) ±2.52dB 9 Occupied Channel Bandwidth ±3.6% 10 Power Spectral Density, conducted ±1.214dB 11 Duty Cycle ±3.2% Page 8 of 65 Report No.: STS2601397W01 2. GENERAL INFORMATION 2.1 GENERAL DESCRIPTION OF THE EUT Product Name Electric Serum Applicator Device Brand Name N/A Model Name KF-2507 Series Model(s) N/A Model Difference N/A Product…

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Page 1 of 2 FCC ID: 2BPSB-KF-2507 Conducted emissions 30MHz-1GHz Page 2 of 2 FCC ID: 2BPSB-KF-2507 Spurious emissions