2BC3X-H13Smart watch

smart wristband user's Guide Wear it p roperly The br acelet i s best wor n after the ulnar styloid Adjust the size of the wrist acc or ding to the adjustment hole; buckle the wrist s tr ap buckle. The sensor should be close to the skin to avoid moving Charge the bracelet Use it for the fir st time to ensure that the battery is in normal condition. If th e power is not turned on normally, pl ease connect the charger to charge the device. Install the bracelet app on your phone Sc an the QR code or go to the App Stor e, app download and install the app. Android/IOS System requirements: Andr oid 5. 0 and above; iOS9.0 and above; support for Bluetooth 4.0. Devi ce connection  For the fir st use, you need to connect the APP for calibration. After the connection is successful, the br acelet will automatically synchronize the time.  Turn on the Bluetooth switch of the mobile phone system → enter the app device module settings → click “Bind device, experience more features” to enter, it will automatically se arch for nearby Bluetooth devices on the br acelet, find and connect th e br acelet device.  Afte r the pairing is successful, the APP will pop up a guide page . According to the instructions, jump to the mobile phone system Bluetooth search t the connection is successful, you can mak e / receive calls and lis ten to music (Note: If the mobile phone system Bluetooth has not been searched equipment, please enter the Dual mode menu and se t it to On, you cannot make calls without connecting the equipment.)  APP will automatically save the Bluetooth addre ss of the brace let, and the APP will open and run in the background, and will automatically search and connect the bracelet;  Android phones use all notification permissions to read contact in formation and give the app background running in the phone settings. Bracelet f unction description  Slide down the standby page to enter the notification reminder, and slide up to enter the contr ol center  Swipe left or right on the standby page to cycle through the dials  Long pr ess 2 seconds on any dial page to start the la nguage assistant. (R emarks: The mobile phone also needs to be connected to the device, and the smart phone needs to set th e user's voice in advance in the voice menu)  Click the screen on the standby page to enter the main menu, th e style of the main menu can be switched  Br acelet reset devi ce This function will clear all data of the br acelet (such as step counting)  Switch to the heart rate three-in-one in terface to start the tes t, heart rate three-in-one in terface 60s timeout automatically off screen (heart r ate and blood pressure need bracelet hardwar e support). Clock interface After synchronizin g with the phone, the bracelet will automatically calibrate the time; Swipe left or right on the standby page to cycle through the dials St ep Number of steps Wear the br acelet and recor d the number of daily movement steps to view the current r eal-time steps. distance The distance of motion is estimated based on the number of walking steps. Calories Estimate the calories burned based on the number of walking steps Heart rate, blood pr essur e, blood oxygen three-in-one After entering the heart rate three-in-one tes t interface for a few seconds, the current heart rate, blood pr essure, and blood oxygen tes t results are displayed. This feature requires a wristband to support heart rate and blood pressure sensor s. di al Dial pad for making calls (note: the phone also needs to be connect ed to a device) phone book Add 8 commonly used contacts in the APP. After the br acelet is successfully connected with the APP Bl uetooth, the contacts can be displayed in the br acelet phone book. Click the contact to make a call (Not e: The phone needs to be connected to a device) Music contr ol The br acelet can contr ol the pr evious song and the next song, and paus e / start playback. (Note: devices need to be connected to use this feature phone) Dual mode switch This switch needs to be turned on for the phone to search for the device. If the phone is not connected to th e device within 5 minutes after the br acelet is turned on, the switch will be turned off automatically, and it needs to be turned on manually when it is used again. exer cise more All sports modes can recor d the calories and duration of skipping rope. Sleep mode When you fall asleep, the br acelet will automatically enter the sleep monitoring mode; automatically detect your deep sleep / light sleep / wak e up all night, calculate your sleep quality; the wristband only show s the tot al length of deep sleep / li ght sleep / sleep, APP end can View sleep data details. Note: Sleep data will be available when you wear your wristband and sleep will be detect ed fr om 10:00 pm. Sleeping data for 3/4 hours can be synchronized to the app while sleeping. Infor mation mode Infor mation menu can view the latest news c ontent St opwatch function Enter the stopwatch and click the star t button to start timing, click the pause button to stop, and click the reset button to clear the timing. Custom dia l You need to connect to the APP to get the dial settings, you can choose the recommended dial / default dial / album custom dial to s ynchronize to the bracelet. APP function and settings Personal information Please set your personal in formation after entering the app. Settings → Personal Information, you can set gender - age - height - weight - dis tance You can also set your dail y goal s teps to monitor daily completions. Application push SMS notification: In the connected state, if the SMS reminder function is enabled, the br acelet will vibrate when there is a t ext message. Other reminders: In the connected state, if this function is enabled, when there ar e messages such as WeChat, QQ, Facebook, etc., the br acelet will vibrate to remind and display th e content received by th e app (Y ou need to give the APP permission to get system notifications, and the wrist…

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Dongguan Langchen Technology Co.,Ltd. Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town, Dongguan City, Guangdong Province, China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2023/10/07 U.S. Agent Designation Dongguan Langchen Technology Co.,Ltd. acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: 2BC3X-H13): Name and company of U.S. agent: GSS SERVICE INC Physical U.S. address of agent: 6547 N Academy Blvd #2266 Colorado Springs COLORADO 80918 United States FRN of U.S. agent: 0033402082 Email address of U.S. agent: [email protected] GSS SERVICE INC acknowledges their obligation to accept service of process on behalf of Dongguan Langchen Technology Co.,Ltd. Dongguan Langchen Technology Co.,Ltd. with the FRN [0034327130] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature Lan Zhou Manager Dongguan Langchen Technology Co.,Ltd. Signature Michoux Logan PM GSS SERVICE INC 48_[mo del] US_Agent_2.911(d)(7) - U, V0 5

Sincerely, Name/Title： Lan Zhou/Manager Company: Dongguan Langchen Technology Co.,Ltd. Address: Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town, Dongguan City, Guangdong Province China Phone: 18823709181 Fax: N/A E-Mail: [email protected]

FCC ID: 2BC3X-H13 External Photos of the EUT Photo 1 Photo 2 Photo 3 FCC ID: 2BC3X-H13 Photo 4 Photo 5 Photo 6 FCC ID: 2BC3X-H13 Photo 7

Label and Location Size: L: 1.0cm*W: 0.5cm Label and Location FCC ID : 2BC3X-H13

FCC ID: 2BC3X-H13 Internal Photos of the EUT Photo 1 Photo 2 Photo 3 FCC ID: 2BC3X-H13 Photo 4 Photo 5 Photo 6 BT PCB Antenna FCC ID: 2BC3X-H13 Photo 7 \

RF Exposure evaluation FCC ID: 2BC3X-H13 1.1. Applicable Standard According to §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to §1.1310 and §2.1093 RF exposure requirement KDB447498 v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies 1.2. Requirement According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 Standalone SAR test exclusion considerations: “Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.23 “ [(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 5) in section 4.1 is applied to determine SAR test exclusion. 1.3. Manufacturing tolerance GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 π/4DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 2.0 Tolerance ±(dB) 1.0 1.0 1.0 8-DPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 2.0 Tolerance ±(dB) 1.0 1.0 1.0 Page 2 of 2 2. E v a l u a t i o n R e s u l t Evaluation Results Band/Mode f (GHz) Antenna Distance (mm) RF output power (including tune-up tolerance) SAR Test Exclusion Threshold SAR Test Exclusion dBm mW BT 2.450 5 3.0 1.9953 0.6246<3.0 Yes 3. C o n c l u s i o n The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 v06 .....................End of Report.........................

Antenna Specification Specifications Summary ITEM SPEC. Model Name P001 2.4 GHz Center Frequency 2402 MHz 2.514 dBi 2441 MHz 2.481 dBi 2480 MHz 2.479 dBi MAX. GAIN 2.514 dBi Polarization Horizontal Azimuth Beam Pattern Omni-directional Impedance 50 Ω Antenna Length 2.0cm Antenna Photo & Length 1. Main antenna : 2402 MHz 2. Main antenna : 2441 MHz . 3. Main antenna : 2480 MHz 4. Result Center Frequency Maximum Ant Gain 2402MHz 2.514 dBi 2441 MHz 2.481 dBi 2480 MHz 2.479 dBi

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ..................... : FCC ID. ........................................... : CTA23092600501 2BC3X-H13 Compiled by ( position+printed name+signature) .. : File administrators Zoey Cao Supervised by ( position+printed name+signature) .. : Project Engineer Amy Wen Approved by ( position+printed name+signature) .. : RF Manager Eric Wang Date of issue ..................................... : Sep. 27, 2023 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address ............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao‘an District, Shenzhen, China Applicant’s name ............................ : Dongguan Langchen Technology Co.,Ltd. Address ............................................ : Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town, Dongguan City, Guangdong Province, China Test specification ...........................: Standard ........................................... : FCC Part 15.247 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Smart watch Trade Mark ....................................... : N/A Manufacturer .................................... : Dongguan Langchen Technology Co.,Ltd. Model/Type reference....................... : H13 Listed Models .................................. : Y13, H13 Mini, H13 Max, L54, L20, L21, H13 Pro, D12, GTS4, H15 Modulation ....................................... : GFSK, Π/4DQPSK, 8DPSK Frequency .......................................... From 2402MHz to 2480MHz Rating ............................................... : DC 3.7V From battery and DC 5.0V From external circuit Result................................................ : PASS Report No.: CTA23092600501 Page 2 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Smart watch Model /Type : H13 Listed Models : Y13, H13 Mini, H13 Max, L54, L20, L21, H13 Pro, D12, GTS4, H15 Applicant : Dongguan Langchen Technology Co.,Ltd. Address : Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town, Dongguan City, Guangdong Province, China Manufacturer : Dongguan Langchen Technology Co.,Ltd. Address : Room 704, No. 27 East, Wusha Xingfa South Road, Chang'an Town, Dongguan City, Guangdong Province, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA23092600501 Page 3 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 T E S T S T A N D A R D S .................................................................. 4 2 S U M M A R Y ............................................................................. 5 2.1 General Remarks 5 2.2 Product Description 5 2.3 Equipment Under Test 5 2.4 Short description of the Equipment under Test (EUT) 5 2.5 EUT operation mode 6 2.6 Block Diagram of Test Setup 6 2.7 Related Submittal(s) / Grant (s) 6 2.8 Modifications 6 3 T E S T E N V I R O N M E N T ............................................................... 7 3.1 Address of the test laboratory 7 3.2 Test Facility 7 3.3 Environmental conditions 7 3.4 Summary of measurement results 8 3.5 Statement of the measurement uncertainty 8 3.6 Equipments Used during the Test 9 4 T E S T C O N D I T I O N S A ND R E S U L T S ............................................ 10 4.1 AC Power Conducted Emission 10 4.2 Radiated Emission 13 4.3 Maximum Peak Output Power 19 4.4 20dB Bandwidth 20 4.5 Frequency Separation 24 4.6 Number of hopping frequency 26 4.7 Time of Occupancy (Dwell Time) 28 4.8 Out-of-band Emissions 32 4.9 Pseudorandom Frequency Hopping Sequence 41 4.10 Antenna Requirement 42 5 T E S T S E T U P P H O T O S O F T H E E U T .......................................... 43 6 P H O T O S O F T H E E U T ............................................................. 44 Report No.: CTA23092600501 Page 4 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 1 T E S T S T A N D A R D S The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz. ANSI C63.10-2013: American National Standard for Testing Unlicensed Wireless Devices Report No.: CTA23092600501 Page 5 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street…

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Report No.: CTA23092600501 Page 35 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn π/4DQPSK (CH39) π/4DQPSK (CH78) reference reference 30MHz-1G 30MHz-1G 1G-25G 1G-25G Report No.: CTA23092600501 Page 36 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 8DPSK (CH00) 8DPSK (CH39) reference reference 30MHz-1G 30MHz-1G 1G-25G 1G-25G Report No.: CTA23092600501 Page 37 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 8DPSK (CH78) reference 30MHz-1G 3G-25G Report No.: CTA23092600501 Page 38 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Band-edge Measurements for RF Conducted Emissions: GFSK Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Report No.: CTA23092600501 Page 39 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn π/4DQPSK Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Report No.: CTA23092600501 Page 40 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 8DPSK Left Band edge hoping off Right Band edge hoping off Left Band edge hoping on Right Band edge hoping on Report No.: CTA23092600501 Page 41 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 4.9 Pseudorandom Frequency Hopping Sequence TEST APPLICABLE For 47 CFR Part 15C section 15.247 (a) (1) requirement: Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hop-ping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400–2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. The system receivers shall have input bandwidths that match the hop-ping channel bandwidths of their corresponding transmitters and shall shift frequencies in synchronization with the transmitted signals. EUT Pseudorandom Frequency Hopping Sequence Requirement The pseudorandom frequency hopping sequence may be generated in a nice-stage shift register whose 5 th and 9 th stage outputs are added in a modulo-two addition stage. And the result is fed back to the input of the first stage. The sequence begins with the first one of 9 consecutive ones, for example: the shift register is initialized with nine ones. ● Number of shift register stages:9 ● Length of pseudo-random sequence:29-1=511 bits ● Longest sequence of zeros:8(non-inverted signal) An example of pseudorandom frequency hopping sequence as follows: Each frequency used equally one the average by each transmitter. The system receiver have input bandwidths that match the hopping channel bandwidths of their corresponding transmitter and shift frequencies in synchronization with the transmitted signals. Report No.: CTA23092600501 Page 42 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 4.10 Antenna Requirement Standard Applicable For intentional device, according to FCC 47 CFR Section 15.203, an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. And according to FCC 47 CFR Section 15.247 (c), if transmitting antennas of directional gain greater than 6dBi are used, the power shall be reduced by the amount in dB that the directional gain of the antenna exceeds 6dBi. Refer to statement below for compliance The manufacturer may design the unit so that the user can replace a broken antenna, but the use of a standard antenna jack or electrical connector is prohibited. Further, this requirement does not apply to intentional radiators that must be professionally installed. Antenna Connected Construction The maximum gain of antenna was 2.514 dBi. Remark:The antenna gain is provided by the customer , if the data provided by the customer is not accurate, Shenzhen CTA Testing Technology Co., Ltd. does not assume any responsibility. Report No.: CTA23092600501 Page 43 of 48 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn 5 T e s t S e t u p P h o t o s o f t h e E U T Repo…

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FCC ID: 2BC3X-H13 Test Setup Photos of the EUT