2AUG3-NKM2141NECKLE RAY

Neckle Ray / Neckle Ray Plus User Guide CELL RETURN Skin Safety Precautions Results of the product may be slower for those with symptoms of menopause. We recommend using the product after consulting with a professional. The product is not recommended during pregnancy, menstruation, or for those who are breast feeding. (Instability of unbalanced hormones can result in temporary skin problems.) For seborrheic or inflammatory skin (skin with skin diseases), we recommended using the product after consulting with a professional. We recommend using the product at least six months after undergoing surgery (cosmetic surgery with injection of prosthetics/LASIK or LASEK) Keep out of reach of children and make sure that the device is not activated near them. Do not use if you suffer from photosensitivity such as sunlight allergies. Remove contact lenses before using the product. Consult with a professional if you have a history of intraocular lens implant or other eye-related medical history. (The light may be bright for first-time users or those sensitive to light. Use the enclosed eye shield for comfortable use.) afte Product Safety Precautions Do not apply shock to the device or arbitrarily attempt to disassemble the device. Do not use the device with wet hands or store near water, as the device is sensitive to humid environments. Do not clean with water, oil, or any types of alcohol (the film coating will peel off). After using the device, clean with the enclosed cleaner towel before storage. The device may feel heated upon use (or after continuous use). This is not a product defect. One side of the cheeks may feel heated upon charging the device. This is not a product defect. The device may be used safely, as the light is not harmful to skin. Product Specification Model (Neckle RAY PLUS+) NK-M2141 / (Neckle RAY) NK-M2131 LED number (Neckle RAY PLUS+) Near-infrared rays (NIR) 153 459 total Red wavelengths 153 Blue wavelengths 153 LED number (Neckle RAY) Red wavelengths 153 306 total Blue wavelengths 153 Size Neckle RAY W162 x H80 x D143 (mm) Cradle W213 x H74.5 x D168 (mm) Capacity (Neckle RAY) 250g / (Cradle) 242g Internal battery Lithium polymer 3.7V 2000mAh Input power supply 5V ⎓ 1A (USB micro 5pin type) Bluetooth version 4.0 BLE Rubber hinge Neckle RAY / Neckle RAY PLUS+ LED ON/OFF indicator ON/OFF button Cradle Clasp (Auto-Lock function-magnet) Neckle RAY charging port Package Neckle RAY / Neckle RAY PLUS+ Cradle Product catalog / Manual Cleaner towel Warranty card Charger Special Features CELLRETURN LED effects: Delivers optimum energy with compound NIR⍺ / NIR / RED effects Customizable fitting wing Through long-term research and clinical testing, CELLRETURN has achieved an independent LED modulepatent for the generation and enhancement of the wavelengths most effective for the skin. CELLRETURN’s use of the finest LED allows safe and close delivery of effective wavelengths deep into the skin. Instant sizing with automatic fitting when placed on the head, with no control buttons or other complications. Like new every day Clean product management with automatic 10-minute UV lamp lighting after starting wireless charging. How to use Thoroughly wash the neck area.. Apply the Neck Cream on the neck area and allow to Open the product clasp, making sure the ON/OFF button is in the front, Use 3 times a week / 5-20 minutes per daily Smart Care Use the official app to check on long-awaited changes! You can use the official CELLRETURN app to check regular usage as well as the improvement process. The app also offers smart management with records of time, date, and states of change. Check usage time Accurately check dates and times Photo gallery Records of daily changes Remote control Bluetooth Smart product care through Bluetooth connection Events Product registration and accumulation of points according to usage time App installation and Device Linking Method App Installation and Login 1. Search for the CELLRETURN app on the Play Store (Android) or App Store (iPhone) and download. tip! First-time use of the app will require signup. 2. Sign up by entering new membership information and confirming via e-mail. tip! You must confirm by e-mail to register. Product Registration 3. Device Registration Press the + button on the bottom right of the app to register the device. tip! Check the product serial number (indicated on the product box) or the warranty card (inside the enclosed envelope) beforehand 4. Serial No. / barcode registration Register the serial number on the warranty card or scan the barcode to register the product. Device Connection 5. Press the connection button under “My Device” to connect the device. tip! When connecting for the first time, connect with the device turned on. Product Control 6. The Neckle RAY can be controlled with the remote function. (Volume can be controlled when the device is on.) tip! Power, volume, and mode of the connected product can easily be controlled absorb. and press the button. session, and use the neck cream to finish. using the app. Problem solution Check before reporting a problem For these problems Take the following measures The product is not working properly. · Check whether the power button was turned on properly. · Charge the device according to the manual. · When charging the device, check whether the battery light on the device is on. The power won’t turn on. · The battery is discharged. ▶ Charge the battery. · Connect the charger adapter to the power supply device. · Check whether the charger is working. · Check that the voltage indicated on the device corresponds to the local voltage. · Plug the charger into the mask and check whether the power turns on. It’s overheating. · Heat is generated while the device is charging, and the device cools down once it is sufficiently charged. · The heat is natural, and is generated from use of the control board. The light won’t turn on when charging. · Check for discharge. Specific wavelengths seem weak. · I…

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Cellreturn Co., Ltd. 237, Namdongseo-ro, Namdong-gu, Inchon, Republic of Korea Tel: +82-1688-1026 / Fax: +82-32-714-3895 Date: December 30, 2019 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 c.c. TIMCO ENGINEERING Inc. 849 N.W. State Road 45 P.O. Box 370 Newberry, Florida 32669 To whom it may concern: I, the undersigned, hereby authorize Hyeon-Su, Jang of KES Co., Ltd. and hereafter referred to as KES Co., Ltd., to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by Hyeon-Su, Jang of KES Co., Ltd. on our behalf shall have the same effect as acts of our own. I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing KES Co., Ltd. as our agent, we still recognize that we are responsible to: a) comply with the relevant provisions of the certification program; b) make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints; c) make claims regarding certification only in respect of the scope for which certification has been granted; d) do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized; e) upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division; f) use certification only to indicate the products are certified as being in conformity with specified standards; Cellreturn Co., Ltd. 237, Namdongseo-ro, Namdong-gu, Inchon, Republic of Korea Tel: +82-1688-1026 / Fax: +82-32-714-3895 g) endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner; h) ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division; i) keep a record of all complaints made known to the us relating to the product’s compliance with requirements of the relevant standard and to make these records available to the Certification Division when requested; j) take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification; k) document the actions taken. This authorization is valid until further written notice from the applicant. Sincerely Yours, Daesung Kim / Manager Cellreturn Co., Ltd. REMARK: 1. This authorization letter will be sent along with your application when filing with the Certification Division. 2. Please follow the format and type it on company letterhead and send original to us. 3. Authorized signature must be in agreement with grantee code contact in FCC database.

Cellreturn Co., Ltd. 237, Namdongseo-ro, Namdong-gu, Inchon, Republic of Korea Tel: +82-1688-1026 / Fax: +82-32-714-3895 Date: December 30, 2019 Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: 2AUG3-NKM2141 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: PERMANENT Exhibit Type File Name Part List NK-M2141_Part List.pdf Schematics Diagram(s) NK-M2141_Schematics.pdf Operation description NK-M2141_Operation description.pdf Block diagram NK-M2141_Block diagram.pdf And 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. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Daesung Kim / Manager Cellreturn Co., Ltd.

Model No.: NK-M2141 Page 1 of 1 External photos

Model No.: HA-M2192 Page 1 of 1 Label photo

Model No.: NK-M2141 Page 1 of 1 Internal photos

FCC ID: 2AUG3-NKM2141 Page 1 of 1 RF exposure According to 447498 D01 General RF Exposure Guidance v06 The 1-g and 10-g SAR test exclusion thresholds for 100 ㎒ to 6 ㎓ at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(㎓)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, Where; f(㎓) is the RF channel transmit frequency in ㎓ Power and distance are rounded to the nearest ㎽ and mm before calculation The result is rounded to one decimal place for comparison Results Bluetooth LE 1 Mbps Frequency ( ㎓ ) Distance (mm) Max Average tune-up power ( ㏈ m) Calculation value Exclusion Threshold ( ㏈ m) ( ㎽ ) 2.402 ~ 2.480 5 -2.00 0.63 0.20 ≤3.0

KES Co., Ltd. 3701, 40, Simin-daero 365beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14057, Korea Tel: +82-31-425-6200 / Fax: +82-31-424-0450 www.kes.co.kr Report No.: KES-RF-20T0020 Page ( 2 ) of ( 32 ) This report shall not be reproduced except in full, without the written approval of KES Co., Ltd. The results shown in this test report refer only to the sample(s) tested unless otherwise stated. The authenticity of the test report, contact [email protected] KES-QP-7081-06 Rev. 7 KES A4 Revision history Revision Date of issue Test report No. Description - 2020.01.30 KES-RF-20T0020 Initial KES Co., Ltd. 3701, 40, Simin-daero 365beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14057, Korea Tel: +82-31-425-6200 / Fax: +82-31-424-0450 www.kes.co.kr Report No.: KES-RF-20T0020 Page ( 3 ) of ( 32 ) This report shall not be reproduced except in full, without the written approval of KES Co., Ltd. The results shown in this test report refer only to the sample(s) tested unless otherwise stated. The authenticity of the test report, contact [email protected] KES-QP-7081-06 Rev. 7 KES A4 TABLE OF CONTENTS 1. General information ................................................................................................................................................... 4 1.1. EUT description ........................................................................................................................................ 4 1.2. Test configuration ...................................................................................................................................... 4 1.3. Device modifications ................................................................................................................................. 5 1.4. Accessory information............................................................................................................................... 5 1.5. Measurement results explanation example ................................................................................................ 5 1.6. Measurement Uncertainty ......................................................................................................................... 5 1.7. Frequency/channel operations ................................................................................................................... 5 2. Summary of tests ........................................................................................................................................................ 6 3. Test results .................................................................................................................................................................. 7 3.1. 6 ㏈ bandwidth ........................................................................................................................................ 7 3.2. Output power ............................................................................................................................................. 9 3.3. Power spectral density ............................................................................................................................. 11 3.4. Radiated restricted band and emissions ................................................................................................... 13 3.5. Conducted spurious emissions & band edge ........................................................................................... 27 3.6. AC conducted emissions ......................................................................................................................... 29 Appendix A. Measurement equipment ......................................................................................................................... 31 Appendix B. Test setup photos ..................................................................................................................................... 32 KES Co., Ltd. 3701, 40, Simin-daero 365beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14057, Korea Tel: +82-31-425-6200 / Fax: +82-31-424-0450 www.kes.co.kr Report No.: KES-RF-20T0020 Page ( 4 ) of ( 32 ) This report shall not be reproduced except in full, without the written approval of KES Co., Ltd. The results shown in this test report refer only to the sample(s) tested unless otherwise stated. The authenticity of the test report, contact [email protected] KES-QP-7081-06 Rev. 7 KES A4 1. General information Applicant: Cellreturn Co., Ltd. Applicant address: 237, Namdongseo-ro, Namdong-gu, Inchon, Republic of Korea Test site: KES Co., Ltd. Test site address: 3701, 40, Simin-daero 365beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14057, Korea 473-21, Gayeo-ro, Yeoju-si, Gyeonggi-do, Korea Test Facility FCC Accreditation Designation No.: KR0100, Registration No.: 444148 FCC rule part(s): 15.247 FCC ID: 2AUG3-NKM2141 Test device serial No.: Production Pre-production Engineering 1.1. EUT description Equipment under test NECKLE RAY Frequency range 2 402 ㎒ ~ 2 480 ㎒ (BLE) Model: NK-M2141 Modulation technique GFSK Number of channels 2 402 ㎒ ~ 2 480 ㎒ (BLE) : 40ch Antenna specification Antenna type : PCB Antenna // Peak gain: -0.84 ㏈i Power source DC 3.7 V (Battery) S/W version 1.0.3 H/W version Rev. 1.3 1.2. Test configuration The Cellreturn Co., Ltd. // NECKLE-RAY // FCC ID: 2AUG3-NKM2141 was tested according to the specification of EUT, the EUT must comply with following standards and KDB documents. FCC Part 15.247 KDB 558074 D01 v05 r02 ANSI C63.10-2013 KES Co., Ltd. 3701, 40, Simin-daero 365beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14057, Korea Tel: +82-31-425-6200 / Fax: +82-31-424-0450 www.kes.co.kr Report No.: KES-RF-20T0020 Page ( 5 ) of ( 32 ) This report shall not be reproduced except in full, without the written approval of KES Co., Ltd. The results shown in this test report refer only to the sample(s) tested unless otherwise stated. The authenticity of the test report, contact [email protected] KES-QP-…

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KES Co., Ltd. 3701, 40, Simin-daero 365beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 14057, Korea Tel: +82-31-425-6200 / Fax: +82-31-424-0450 www.kes.co.kr Report No.: KES-RF-20T0020 Page ( 32 ) of ( 32 ) This report shall not be reproduced except in full, without the written approval of KES Co., Ltd. The results shown in this test report refer only to the sample(s) tested unless otherwise stated. The authenticity of the test report, contact [email protected] KES-QP-7081-06 Rev. 7 KES A4 Appendix B. Test setup photos The end of test report. Radiated Blank AC conducted