2BCKX-WATCH6ULTRAsmart watch

Watch6Ultra smart watch Thank you for choosing our smart watch. You can read this manual to fully understand how to use the device. This device is mainly connected to the mobile phone through Bluetooth for adaptation and use. It provides a variety of practical functions and services to facilitate your operation of the mobile phone. Human movement and health functions. The company reserves the right to modify the contents of this manual without any prior notice without notice This product supports IP68 waterproof, the application scenario supports rain, hand washing and other daily waterproof, swimming is not recommended to wear, hot shower or sauna, etc., can not prevent water vapor. If the watch is damaged due to water ingress due to failure to follow the instructions, our company will not provide free warranty. Operating instructions: Side button function： 1.Up button: Function button: Single press to enter Gypsophila; when in other application interface, single press to return to the upper level interface; Double-press to switch menu style on menu interface; 2.Down button: long press to switch the machine; single press on the dial interface to turn on and off the screen, other interfaces return to the dial interface with one key; Touch gesture:Double-click on the dial interface to enter the SIRI interface; swipe left to switch to the component interface; swipe right to enter the split-screen UI; swipe down to enter the control center; swipe up to enter information; after entering each function, swipe right to return. Dial switch: The rotary encoder switches the dial. Strap replacement: Pull forward with one hand, and push forward with the other hand at the same time, the strap can be easily disassembled; Charging instructions: It supports wireless charging. When charging, place the watch on the disc, and support the computer USB or mobile phone 5V standard charger, which can be fully charged in about 150 minutes. Horizontal and vertical charging screen: When connected to the power supply and placed horizontally or vertically, the bedside clock interface will be displayed. Connection between watch and mobile phone: First, the mobile phone must download the APP "RDFit" to the mobile phone and install it in two ways。 1.IOS/Android phone user： Scan the QR code below through the mobile browser, or scan it with WeChat. When the interface is opened, click the Android/iOS download option and choose to open the download with the mobile browser. The QR code in the figure below is the RDFit APP download Android/iOS 2 2.For Android phones, search for "RDFit" and download in App Store, Google Play, and various mobile app stores, and for Apple phones, search for "RDFit" and download on the App Store. After the download is complete, there will be various permission reminders during the installation process, click to agree to all, and the watch and the mobile phone must be connected to two Bluetooth 3.0 and 5.0 to realize all functions. Bluetooth 5.0 connection method: After the installation is completed, open "RDFit" and turn on the mobile phone Bluetooth. The RDFit will be prompted with an activation notification. Click OK. Click more in the lower right corner, enter the scanning device, search the watch6pro Bluetooth address and click Connect. Some Android phones need to turn on the mobile GPS to find the watch Bluetooth name. Bluetooth 3.0 connection method: 1. Turn on Watch 3.0 Bluetooth and watch6ultra audio Bluetooth will pop up on the mobile phone after the APP terminal is connected successfully. (Note: To prevent high power consumption during connection use, it is recommended to turn off the media audio switch in Bluetooth) How to verify that the Bluetooth connection is successful: The watch pulls down the status bar on the standby interface. When the Bluetooth of the watch 3.0 and 5.0 are blue + green, it means that the Bluetooth connection is successful. When the color of the Bluetooth logo is grayed out, it means that the Bluetooth is not connected. Simple handling methods for common problems: Since the Bluetooth protocol of each mobile phone brand is not uniform, sometimes the Bluetooth connection between the mobile phone and the watch may be unstable. You can turn off the Bluetooth of the mobile phone and reconnect it again, or restore the watch to the factory settings. How to set the notifications： Mobile phone enters settings-application management, find "RDFit"-permission management, open all. Then enter the notification management-find all the permissions of "RDFit" to open. Open "RDFit"-more-application push-open the background running permission, enter the option without restrictions. When you return, you will be prompted to open the auto-start again and enter the open. Go back, select the APP for synchronization information notification, such as QQ WeChat, and select Open. Note: If the WeChat computer version is online at the same time, the mobile phone will not receive notifications. Some mobile phones also need to add "RDFit" to the power saving whitelist to avoid being turned off by the mobile phone when the battery is low. What should I do if I do not receive the notification? First of all, the notification function of the watch is only to synchronize the notification function of the mobile phone, such as incoming call and letter, QQ WeChat letter reminder, if your mobile phone does not receive the notification, then the watch will not receive it. You should find the corresponding APP in the phone settings-notification function , Turn on the permission notification. Main function introduction: Encoder:The dial button on the standby interface can switch the dial, and it can slide up and down in the secondary menu; the gypsophila style menu can be zoomed in and out，After the interface is maximized, you can enter the application in the middle of the interface. Split Screen:Swipe right on the dial interface to enter the split screen function, and you can quickly enter the corresp…

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Shenzhen Daiku Technology Co., Ltd Covered Equipment Certification Attestation Letter 4/21/2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA ATTN.: Reviewing Engineer FCC ID: 2BCKX-WATCH6ULTRA Shenzhen Daiku 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. 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. Shenzhen Daiku 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 a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Shenzhen Daiku Technology 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). <Signature>: Name: Zhang Jiali Title: Manager Company: Shenzhen Daiku Technology Co., Ltd Date: 4/21/2026

Shenzhen Daiku Technology 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 4/21/2026 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2BCKX-WATCH6ULTRA FRN of applicant: 0034153254 Per section 2.911(d)(7) of the FCC rules, [Shenzhen Daiku Technology 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: Herland International Trading Inc FCC Registration Number (FRN): 0036324101 Physical U.S. Company Address: 1370 Valley Vista Dr Ste 200 Diamond Bar, CA 91765 Contact Person: Jianfeng Gao 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: Zhang Jiali Title: Manager Company Name: Shenzhen Daiku Technology Co., Ltd Date: 4/21/2026 Agent Signed (if different from Applicant): Signed: Printed name: Jianfeng Gao Title: Manager Company Name: Herland International Trading Inc Date: 4/22/2026

Shenzhen Daiku Technology Co., Ltd 2026-4-21 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act as Agent On our behalf, I appoint Shenzhen DL Testing Technology Co., Ltd.（101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China）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 Shenzhen Daiku Technology Co., Ltd （605-606, Building E, Longjing Science Park, No.339 Bulong Road, Longgang District, Shenzhen ） <Signature>: Name: Zhang Jiali Title: Manager Company: Shenzhen Daiku Technology Co., Ltd

Shenzhen Daiku Technology Co., Ltd 2026-4-21 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: Zhang Jiali Title: Manager Company: Shenzhen Daiku Technology Co., Ltd

Shenzhen Daiku Technology Co., Ltd 2026-4-21 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2BCKX-WATCH6ULTRA Product Name: smart watch 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: Zhang Jiali Title: Manager Company: Shenzhen Daiku Technology Co., Ltd

Shenzhen Daiku Technology Co., Ltd FCC ID: 2BCKX-WATCH6ULTRA Product Similarity Declaration Applicant: Shenzhen Daiku Technology Co., Ltd Address: 605-606, Building E, Longjing Science Park, No.339 Bulong Road, Longgang District, Shenzhen Manufacturer: Shenzhen Daiku Technology Co., Ltd Address: 605-606, Building E, Longjing Science Park, No.339 Bulong Road, Longgang District, Shenzhen Product Name: smart watch Trade Mark: N/A Model Number: Watch6Ultra, R2 We (Shenzhen Daiku Technology Co., Ltd ) hereby state that all the models are electrical identical including the same software parameter and hardware design (i.e., circuit design, PCB Layout, RF module/circuit, antenna type(s) and antenna location, components on PCB, etc.,), same mechanical structure and design (including product enclosure, materials, etc.,), All models are the same as the samples except for the model name and appearance color with various straps. <Signature>: Name: Zhang Jiali Title: Manager Company: Shenzhen Daiku Technology Co., Ltd

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(External Photos) Model Number: Watch6Ultra Model Number: R2 Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

Size:15*12mm M/N: Watch6Ultra FCC ID: 2BCKX-WATCH6ULTRA Label location

Shenzhen DL Testing Technology Co., Ltd. EUT PHOTO(Internal Photos) Shenzhen DL Testing Technology Co., Ltd. ANT Shenzhen DL Testing Technology Co., Ltd. ※※※※※ END OF REPORT ※※※※※

FCC ID: 2BCKX-WATCH6ULTRA RF Exposure Evaluation According to KDB 447498 D01 V06 and part 2.1093，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(s), listed below, is (are) satisfied. For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(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 EIRP=E Meas +20log(d Meas )-104.7 EIRP is the equivalent isotropically radiated power, in dBm E Meas is the field strength of the emission at the measurement distance, in dBμV/m d Meas is the measurement distance, in m Here, For BT Max Power(dBm) Max Power(mW) Frequency(MHz) Min. distance(mm) Calc. thresholds limit 2.52 1.79 2402 5 0.55 3.0 So a SAR test is not required

Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260323045R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 1 of 33 FCC Part 15C Test Report FCC ID: 2BCKX-WATCH6ULTRA Applicant: Shenzhen Daiku Technology Co., Ltd Address: 605-606, Building E, Longjing Science Park, No.339 Bulong Road, Longgang District, Shenzhen Manufacturer: Shenzhen Daiku Technology Co., Ltd Address: 605-606, Building E, Longjing Science Park, No.339 Bulong Road, Longgang District, Shenzhen Product Name: smart watch Trade Mark: N/A Model Number: Watch6Ultra, R2 Date of Receipt: Mar. 20, 2026 Test Date: Mar. 20, 2026 - Mar. 31, 2026 Date of Report: Mar. 31, 2026 Prepared By: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China Applicable Standards: FCC PART 15 C 15.247 ANSI C63.10:2020+Cor.1:2023 Test Result: Pass Report Number: DLE-260323045R Prepared (Test Engineer): Alisa Song Reviewer (Supervisor): Jack Bu Approved (Manager): Jade Yang This test report is based on a single evaluation of one sample of above mentioned products. It is not permitted to be duplicated in extracts without written approval of Shenzhen DL Testing Technology Co., Ltd. Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260323045R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 2 of 33 Table of Contents Page 1. . SUMMARY OF TEST RESULTS 4 1.1. MEASUREMENT UNCERTAINTY 4 2. . GENERAL INFORMATION 5 2.1. GENERAL DESCRIPTION OF EUT 5 2.2. DESCRIPTION OF TEST MODES 6 2.3. BLOCK DIGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 6 2.4. DESCRIPTION OF SUPPORT UNITS(CONDUCTED MODE) 7 2.5. TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 7 2.6. EQUIPMENTS LIST FOR ALL TEST ITEMS 8 3. . EMC EMISSION TEST 9 3.1. CONDUCTED EMISSION MEASUREMENT 9 3.1.1. POWER LINE CONDUCTED EMISSION LIMITS 9 3.1.2. TEST PROCEDURE 9 3.1.3. DEVIATION FROM TEST STANDARD 9 3.1.4. TEST SETUP 10 3.1.5. EUT OPERATING CONDITIONS 10 3.1.6. TEST RESULTS 11 3.2. RADIATED EMISSION MEASUREMENT 13 3.2.1. RADIATED EMISSION LIMITS 13 3.2.2. TEST PROCEDURE 14 3.2.3. DEVIATION FROM TEST STANDARD 14 3.2.4. TEST SETUP 14 3.2.5. EUT OPERATING CONDITIONS 15 3.2.6. TEST RESULTS (BETWEEN 9KHZ – 30 MHZ) 16 3.2.7. TEST RESULTS (BETWEEN 30MHZ – 1GHZ) 17 3.2.8. TEST RESULTS (1GHZ~25GHZ) 19 3.3 RADIATED BAND EMISSION MEASUREMENT 20 3.3.1 TEST REQUIREMENT: 20 3.3.2 TEST PROCEDURE 20 3.3.3 DEVIATION FROM TEST STANDARD 20 3.3.4 TEST SETUP 21 3.3.5 EUT OPERATING CONDITIONS 21 3.4 CONDUCTED BAND EDGE EMISSION&CONDUCTED SPURIOUS EMISSIONS MEASUREMENT 23 3.4.1 APPLICABLE STANDARD 23 3.4.2 TEST PROCEDURE 23 3.4.3 DEVIATION FROM STANDARD 23 3.4.4 TEST SETUP 23 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260323045R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 3 of 33 Table of Contents Page 3.4.5 EUT OPERATION CONDITIONS 23 3.4.6 TEST RESULTS 23 4. . PEAK OUTPUT POWER 26 4.1. APPLIED PROCEDURES / LIMIT 26 4.1.1. TEST PROCEDURE 26 4.1.2. DEVIATION FROM STANDARD 26 4.1.3. TEST SETUP 26 4.1.4. EUT OPERATION CONDITIONS 26 4.1.5. TEST RESULTS 27 5. . POWER SPECTRAL DENSITY TEST 29 5.1. APPLIED PROCEDURES / LIMIT 29 5.1.1. TEST PROCEDURE 29 5.1.2. DEVIATION FROM STANDARD 29 5.1.3. TEST SETUP 29 5.1.4. EUT OPERATION CONDITIONS 29 5.1.5. TEST RESULTS 29 6. . 6DB BANDWIDTH TEST 31 6.1. APPLIED PROCEDURES / LIMIT 31 6.1.1. TEST PROCEDURE 31 6.1.2. DEVIATION FROM STANDARD 31 6.1.3. TEST SETUP 31 6.1.4. EUT OPERATION CONDITIONS 31 6.1.5. TEST RESULTS 31 7. . ANTENNA REQUIREMENT 33 7.1. STANDARD REQUIREMENT 33 7.2. EUT ANTENNA 33 8. . TEST SEUUP PHOTO 33 9. . EUT PHOTO 33 Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260323045R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 4 of 33 1.. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: FCC Part15 (15.247) , Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS 15.205, 15.209, 15.247(d) Radiated Spurious Emission PASS 15.209, 15.205 Band Edge Emission PASS 15.247(b) Peak Output Power PASS 15.247(a)(2) 6dB Bandwidth PASS 15.247(e) Power Spectral Density PASS 15.203 Antenna Requirement PASS NOTE: (1)” N/A” denotes test is not applicable in this Test Report Test lab: Shenzhen DL Testing Technology Co., Ltd. Address: 101-201, Comprehensive Building, Tongzhou Electronics Longgang Factory Area, No.1 Baolong Fifth Road, Baolong Community, Baolong Street, Longgang District, Shenzhen, China FCC Test Firm Registration Number: 854456 Designation Number: CN1307 IC Registered No.: 27485 CAB ID.: CN0118 1.1. 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 Conducted Emission Test ±2.56dB 2 RF power,conducted ±0.42dB 3 Spurious emissions,conducted ±2.76dB 4 All emissions,radiated(<1G) ±3.65dB 5 All emissions,radiated(>1G) ±4.89dB 6 Temperature ±0.5°C 7 Humidity ±2% 8 6dB Bandwidth ±0.2MHz 9 Power Spectral Density ±0.3dBm Shenzhen DL Testing Technology Co., Ltd. Report No.: DLE-260323045R Test Report Tel: 400-688-3552 Web:www.dl-cert.com Email: [email protected] Page 5 of 33 2.. GENERAL INFORMATION 2.1. GENERAL DESCRIPTION OF EUT Product Name: smart watch Trade Mark: N/A Model Number: Watch6Ultra, R2 Test Model: Watch6Ultra Model Difference: All models are same as the samples except model name and appearance color with various straps, they have the same structure and circuit. Operation Frequency: 2402~2480MHz Channel numbers: 40 Channels Channel separation: 2MHz Data Rate: 1Mbps Modulation technology: GFSK Antenna Type: Internal Antenna Antenna gain: 0.17 dBi Power supply: DC 5V DC 3.8V from battery N…

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深圳市麒鑫通达科技有限公司 SHENZHEN QXTD Technology Co., Ltd 样 品 承 认 书 Part Approval Sheet Version： V1.0 Customer： Shenzhen Haikangsheng Intelligent Co., Ltd Project： Bluetooth antenna Part Name： Conducting wire Part Color： Black Part Number： Sample Delivery Date： April 3, 2021 Sample Quantity： 5PCS Sample type： Built-in Bluetooth wire Reason for Sample Delivery： ○New tooling ○New supplier ○Tooling change ○Engineering change ○Other: Remark： Supplier sample production confirmation: (stamp required) Formulate Confirm Approve Quality Stamp 代庆蓉 龙超群 傅梁成 曹光平 Customer approval: Project confirmation Project approval Quality confirmation Quality approval Confirmation date 深圳市麒鑫通达科技有限公司 SHENZHEN QXTD Technology Co., Ltd 样 品 承 认 书 Page 1 Confidential documents 机 密 文 件 1.Graphic for reference Figure 2 0.8*20mmBT 2.OTA(Free Space) Channel TRP（dBm） TIS（dBm） 0 6.3 -91.1 39 6.5 -91.3 78 6.6 -91.2 Name ANTENNA Model LT13 Frequency 2.4Ghz Input impedance 50Ω Allowed power 5mW Working temp. -25 ~ +65 °C Storage temp. -40 ~ +85 °C Weight 0.25g Antenna gain天线 增益 0.17dBi 深圳市麒鑫通达科技有限公司 SHENZHEN QXTD Technology Co., Ltd 样 品 承 认 书 Page 2 Confidential documents 机 密 文 件 3.Field 深圳市麒鑫通达科技有限公司 SHENZHEN QXTD Technology Co., Ltd 样 品 承 认 书 Page 3 Confidential documents 机 密 文 件 4. BT Test Test term Environment Max pairing distance BT Call distance BT Office 16-18m 10-12m 5.Blueprint 深圳市麒鑫通达科技有限公司 SHENZHEN QXTD Technology Co., Ltd 样 品 承 认 书 Page 4 Confidential documents 机 密 文 件

Shenzhen DL Testing Technology Co., Ltd. EUT TEST PHOTO Radiated Measurement Photos Shenzhen DL Testing Technology Co., Ltd. Conducted Measurement Photos ※※※※※ END OF REPORT ※※※※※