UZCMFB-HC7700Bluetooth bone-conduction Earphone

It’s Sound MobiFren Healing Fit (MFB -HC77 00) Manual We make our products by dreaming that all the users are happy with MobiFren’s products. Premium stereo sound perfected by MSTS TM Technology MobiFren's own specialized tuning technology. MSTS TM is a Sound Tuning Technology of MobiFren Co.,Ltd Table of contents Components ........................................................................................................................................ 1 Turn On / Turn Off ........................................................................................................................... 2 Charging ................................................................................................................................................ 2 Names and Functions of the Parts ............................................................................................ 3 Before Use ............................................................................................................................................ 4 Terminology ......................................................................................................................................... 4 How to use ........................................................................................................................................... 5 Therapy Function (TES + Sound) ........................................................................... 5~ 6 Connecting to a Device by Bluetooth ........................................................................ 7 Using a Device by Bluetooth .......................................................................................... 7 Using the Built-in MP3 Player ........................................................................................ 7 Button Controls .................................................................................................................... 8 Charging and LED Indications ....................................................................................... 8 FAQ ................................................................................................................................................... 9-10 Handling Precautions ..................................................................................................................... 10 Certification & Safety Approval ................................................................................................ 11 Product Specifications & Features ........................................................................................... 12 Product Warranty ............................................................................................................................ 13 - 1 - Components Healing Fit Main Body Leather Pouch User Manual Charging Cable (C-Type) ※ Images marked are intended to help understand the product and may differ from the actual product. - 2 - Turn On / Turn Off < Turn On > If you press the central TES button on the back of the left body for three seconds while the device is off, the blue LED turns on and the product turns on with the voice command “Power On." < Turn Off > If you press the central TES button on the back of the left body for three seconds while the device is on, the red LED turns on and the product turns off with the voice command “Power Off." Charging - Yo u can charge your Healing Fit with the enclosed C-Type cable. - You can charge it by removing the silicone cover from the main body of the left device that has the button and then connecting the cable, and a 5V 1A charger is recommended for charging. < Charging > Charging Cable (C-Type) - 3 - Names and Functions of the Parts (1 ) Touch Button Capacitive touch button to control the volume, next song, etc. in the product (2) Electrode plate Transfers TES microcurrents to the human body (3) Silicone Unit Transmits the sound of the bone conduction unit (4) LED Checks the product status (5) Exclusive TES Button Controls the TES function (6) USB Charging Port ( C-Type ) C-Type charging terminal cover (7) Ear Band Flexible band with built-in shape memory alloy (ear) (8) Main Band Flexible band with built-in shape memory alloy (neck) - 4 - Before Use  Charge HEALINGFIT for a minimum of 10 minutes with the C-type USB charging cable before first use.  When connecting with a new device (mobile phone), please confirm that this HEALINGFIT is not connected with another device.  If there are any other equipments already paired to Healing Fit beforehand, Healing Fit is automa tically connected to the device paired beforehand, so unable to be paired with another device.  When battery alarm appears while using wireless, use after recharging by connecting it with the r echarging cable.  MobiFren HEALINGFIT is comprised of four functional types of TES (transcranial electrical stimulation) therapy, sound therapy, Bluetooth, and MP3 player. ※ Dry your skin of any sweat or moisture before using TES therapy. ※ When using a charger that is not connected to a PC , please use an approved charger of rated voltage 5V/1A. ※ This product is not a medical device. Terminology  Therapy Mode: Activates three different modes of sound therapy (Healing, Study, S leep) and TES.  Bluetooth Mode: Connects to a device by Bluetooth for making calls and listening to music.  MP3 Mode: Plays music saved in the internal memory (MP3 player). ※ Music saved in the internal memory can be played without connecting to a mobile device.. ※ If you accidentally delete the sound therapy content in any of the default folders (Healing, Study, Sleep), it can be downloaded from the healingfit website (https://healingfit.info ) - 5 - How to use ※ Put HEALINGFIT on as shown in the image below. MobiFren Healing Fit is so simple to use that anyone can use it easily. HEALINGFIT combines TES and sound therapy to give you revitalizing rest. (MobiFren recommends around 30 minutes of TES therapy a day.) ●…

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Rev 11/20/07 Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID : UZCMFB-HC7700 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: Exhibit Type File Name Block diagram Schematics Schematics_PCB Layout Parts list Operational description Block diagram.pdf Schematics.pdf Schematics_PCB Layout.pdf Part list.pdf Operational description.pdf 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, NAME: Jin Yun, Seo Applicant: MobiFren Co., Ltd.

Federal Communications Commission Authorization and Evaluation Division 1435 Oakland Mills Road Columbia, MD 21046 Date : May 31, 2022 SUBJECT: FCC Application for (FCC ID : UZCMFB-HC7700) To Whom It May Concern: `` We, the undersigned, hereby authorize Young-taek, Lee at CTK on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by CTK on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Regards, NAME: Jin Yun, Seo Applicant: MobiFren Co., Ltd.

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com EUT External Photographs CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Label and Location CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Rear side of the package

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com EUT Internal Photographs CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com [Antenna] Front Side Rear Side CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-100, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com [Battery]

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Page 1 of 3 RF EXPOSURE EVALUATION Applicant MobiFren Co., Ltd. Applicant Address (Gupyeong Dong), 88, Indong 52 Gil, Gumi, Gyeongbuk, 39445, Korea FCC ID UZCMFB-HC7700 Product Description Bluetooth bone-conduction Earphone Basic model MFB-HC7700 Variant Model name - Operating Frequency 2 402 MHz - 2 480 MHz Antenna type FPC Antenna Antenna gain -0.13 dBi Power Source DC 3.7 V (Battery) Number of channels 79 CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Page 2 of 3 ** RF Exposure Evaluation** Exemption Limits for Routine Evaluation SAR Test Exclusion Thresholds for 100 MHz - 6 GHz and ≤ 50 mm Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation Distances are illustrated in the following Table, The equation and threshold in Note 1 must be applied to determine SAR test exclusion. Note 1 : 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 : CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Page 3 of 3 [(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 - 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below 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 according to 4.1f) is applied to determine SAR test exclusion. Output Power : Mode Frequency (MHz) Measured conducted power (dBm) Power tolerance [dB] Maximum conducted power (dBm) Maximum conducted power (mW) SAR Test Exclusion Threshold (mW) Bluetooth Classic BDR 2 441 -5.30 + 1.5 -3.80 0.417 10 Per FCC KDB 447498 D01v06, the SAR exclusion threshold for distances ≤50mm is defined by the following equation : [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]* [√f(GHz)] ≤ 3.0 Base on the maximum conducted power of the antenna to use separation distance, SAR was not required; Bluetooth Classic BDR : [(0.417 / 5) * √2.441] = 0.130 (≤ 3.0) Result : As a result of the calculation above, the SAR test is exempt

TEST REPORT CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 Report No.: CTK-2022-01997 Page (1) / (45) Pages [QF-QP15-07] Ver.01 R102 1. Applicant ◦ Name : MobiFren Co., Ltd. ◦ Address : (Gupyeong Dong), 88, Indong 52 Gil, Gumi, Gyeongbuk, 39445, Korea ◦ Date of Receipt : 2022-05-18 2. Manufacturer ◦ Name : Ovtech Industrial Co., Ltd ◦ Address : 3F, Bldg 3,Dong Wangyang Industrial Park Huangtian Xixiang Baoan. Shenzhen Guang Dong China 3. Use of Report : For FCC Certification 4. Test Sample / Model: Bluetooth bone-conduction Earphone / MFB-HC7700 5. Date of Test : 2022-07-21 to 2022-07-23 6. Test Standard(method) used : FCC 47 CFR part 15 subpart C 15.247 ANSI C63.10-2013 7. Testing Environment: Temp.: (23 ± 1) °C, Humidity: (48 ± 5) % R.H. 8. Test Results : Compliance 9. Location of Test : Permanent Testing Lab On Site Testing The results shown in this test report refer only to the sample(s) tested unless otherwise stated. This report cannot be reproduced or copied without the written consent of CTK Approval Tested by Gwanyong Kim: (Signature) Technical Manager Young-taek Lee: (Signature) Remark. This report is not related to KOLAS accreditation and relevant regulation. 2022-07-27 CTK Co., Ltd. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 Report No.: CTK-2022-01997 Page (2) / (45) Pages [QF-QP15-07] Ver.01 R102 REPORT REVISION HISTORY Date Revision Page No 2022-07-27 Issued (CTK-2022-01997) all This report shall not be reproduced except in full, without the written approval of CTK Co., Ltd. This document may be altered or revised by CTK Co., Ltd. personnel only, and shall be noted in the revision section of the document. Any alteration of this document not carried out by CTK Co., Ltd. will constitute fraud and shall nullify the document. CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 Report No.: CTK-2022-01997 Page (3) / (45) Pages [QF-QP15-07] Ver.01 R102 CONTENTS 1. General Product Description ....................................................................................... 4 1.1 Client Information ............................................................................................. 4 1.2 Product Information ........................................................................................... 4 1.3 Peripheral Devices ............................................................................................. 4 2. Facility and Accreditations .......................................................................................... 5 2.1 Test Facility ...................................................................................................... 5 2.2 Laboratory Accreditations and Listings .................................................................. 5 2.3 Calibration Details of Equipment Used for Measurement .......................................... 5 3. Test Specifications .................................................................................................... 6 3.1 Standards ........................................................................................................ 6 3.2 Mode of operation during the test ........................................................................ 6 3.3 Maximum Measurement Uncertainty .................................................................... 7 4. Technical Characteristic Test ....................................................................................... 8 4.1 Carrier Frequency Separation .............................................................................. 8 4.2 Number of Hopping Frequencies ........................................................................ 10 4.3 20 dB bandwidth & 99 % Bandwidth .................................................................. 12 4.4 Time of Occupancy (Dwell Time) ....................................................................... 16 4.5 Maximum peak Conducted Output Power ............................................................ 21 4.6 Unwanted Emissions (Conducted) ...................................................................... 25 4.7 Radiated Emission ........................................................................................... 31 4.8 AC Power Line Conducted Emissions................................................................... 42 5. APPENDIX A – Test Equipment Used For Tests ............................................................. 45 CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 Report No.: CTK-2022-01997 Page (4) / (45) Pages [QF-QP15-07] Ver.01 R102 1. General Product Description 1.1 Client Information Company MobiFren Co., Ltd. Contact Point (Gupyeong Dong), 88, Indong 52 Gil, Gumi, Gyeongbuk, 39445, Korea Contact Person Name : Jin Yun, Seo E-mail : [email protected] Tel : +82-54-474-2220 Fax : +82-54-474-2251 1.2 Product Information FCC ID UZCMFB-HC7700 Product Description Bluetooth bone-conduction Earphone Basic model MFB-HC7700 Variant Model name - Operating Frequency 2 402 MHz – 2 480 MHz RF Output Power GFSK : -5.300 dBm (0.295 mW) - Peak Conducted Antenna type FPC Antenna Antenna gain -0.13 dBi Number of channels 79 Channel Spacing 1 MHz Type of Modulation GFSK (1 Mbps) Power Source DC 3.7 V (Battery) Test Software BT_Tool_v1.1.1 RF Power setting in Test SW Power Setting “7” 1.3 Peripheral Devices Device Manufacturer Model No. Serial No. Note Computer HP 15-bs563TU CND7253R6P AC/DC Adapter HP HSTNN-LA40 7628011101 CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 Report No.: CTK-2022-01997 Page (5) / (45) Pages [QF-QP15-07] Ver.01 R102 2. Facility and Accreditations 2.1 Test Facility 5, Dongbu-ro 221beon…

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Shenzhen Heming Micro Technology Co., Ltd 1 Shenzhen Heming Micro Technology Co., Ltd all rights reserved Parts ApprovalSheet Environmentalrequirements：█ ROHS□ REACH□ 无 Customer Fu You Chang ProjectFN-5309B-005 Band2.4GColorBlack PNVersionV1 Customer materialnumber R&DQC IssuedbyCheckedbyConfirmedbyCheckedby Li ZhengquanZhang Zhongjun Su Haiwen Customer Confirm Shenzhen Heming Micro Technology Co., Ltd 2 Shenzhen Heming Micro Technology Co., Ltdall rights reserved Contents Contents ........................................................................................................................................... 2 1.Summary ....................................................................................................................................... 3 2.GeneralDescription ...................................................................................................................... 3 2.1AntennaComponents/Partrevisions .................................................................................... 3 2.2Definitions ............................................................................................................................... 3 3.ElectricalPerformance .................................................................................................................. 4 3.1MatchingCircuitDescription ................................................................................................ 4 3.2VSWR(Testinfreespace) ...................................................................................................... 4 3.3Gain&Efficiency ...................................................................................................................... 5 3.43DRadiationPattern ............................................................................................................. 5 ReliabilityTestingReport： ............................................................................................................ 6 Shenzhen Heming Micro Technology Co., Ltd 3 Shenzhen Heming Micro Technology Co., Ltdall rights reserved 1.Summary This report summarizes the electrical results of the our antenna to support the project W203. The test fixture is made for further testing, which is show below： 2.GeneralDescription 2.1Antenna Components/Part revisions The antenna part number is T：A 2.2Definitions VSWR：Voltage Standing Wave Rate TRP：total radiated power TIS：total istropic sensitivity Shenzhen Heming Micro Technology Co., Ltd 4 Shenzhen Heming Micro Technology Co., Ltdall rights reserved 3.ElectricalPerformance 3.1 Matching Circuit Description 3.2 VSWR(Test in free space) Freq.(MHz) 240024402500 VSWR 1.621.421.54 Shenzhen Heming Micro Technology Co., Ltd 5 Shenzhen Heming Micro Technology Co., Ltdall rights reserved 3.3 Gain&Efficiency Frequency（Mhz） Gain（db）Efficiency（%） 2400 -0.734.94 2410 -1.0934.5 2420 -1.2434.21 2430 -1.1534.77 2440 -0.9935.21 2450 -0.7636.21 2460 -0.5936.04 2470 -0.3137.34 2480 -0.1337.83 2490 0.0638.36 2500 0.138.08 3.4 3D Radiation Pattern Shenzhen Heming Micro Technology Co., Ltd 6 Shenzhen Heming Micro Technology Co., Ltdall rights reserved ReliabilityTestingReport： customer Fu Youchang part numberFPCWork Date2021.11.15 Test itemTest requirementTest resultEvaluation neutral Salt-Fog test Hydrochloric fog through neutral testing: In the time of 24 hours, no rust corrosion, color fading or solder peel off to the antenna fpc sop in Nacl 5% ± 1% PH value 6.5-7.2, above 85% humidity. and 35 °C± 2 °C Seals environment. Norust corrosion, color fading or solder peel off on the antenna surface after testing pass tester：Su Haiwenapproval：Su Haiwen Shenzhen Heming Micro Technology Co., Ltd 7 Shenzhen Heming Micro Technology Co., Ltd all rights reserved

CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Page (1) / (5) Pages Test Setup Photo AC Power Line Emissions measurement CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Page (2) / (5) Pages Radiated Emissions measurement 9 kHz to 30 MHz 30 MHz to 1 GHz CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Page (3) / (5) Pages 1 GHz to 18 GHz CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Page (4) / (5) Pages 18 GHz to 26.5 GHz CTK Co., Ltd. (Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 17142, Korea Tel: +82-31-339-9970 Fax: +82-31-624-9501 www.e-ctk.com Page (5) / (5) Pages Conducted Emissions measurement