2AB73-2208ASmart Health Bracelet

OasisCompliance,Inc.FCCID: 2AB73-2208A CFR47§2.911(d)(7)FCCUSAgentLetterofAttestation Date:07-06-2023 FCCID:2AB73-2208A To:FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 ToWhomItMayConcern, ThisletteristoconfirmthatwehaveacceptedtheresponsibilitytoactasUSAgentonbehalf ofJointChineseLtd.(“theapplicant”)fortheabovereferencedFCCID. Weareawareoftherequirementsandresponsibilitiesoftheapplicant’sagentforserviceof processasoutlinedintheFCCsection2.911(d)(7)andReportandOrderFCC22-84paragraph 63. U.S.AgentInformation: OasisCompliance,Inc. FRN:0033464157 JamesHe 3313VerdiDr,SanJose,CA95111 Cell:2026028330 Sincerelyyours, JamesHe GlobalMarketAccessManager OasisCompliance,Inc. Email:[email protected]

C5266091_X24_Ed.2 1/1 “Attestation Statements” TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Joint Chinese Ltd Grantee code: 2AB73 FCC ID: 2AB73-2208A Contact Name: Kathy Zhao Address: Building 6, Huafeng Tech Park, Luotian Industrial Area, Songgang Town, Bao’an District, Shenzhen, China Telephone No: 86-755-33180892 Fax No: 86-755-33180893 Email: [email protected] i. [Joint Chinese 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. The applicant must sign this certification. ii. [ Joint Chinese Ltd] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. Joint Chinese Ltd 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. Date: 07.11.2023 Applicant’s Name: Kathy Zhao Title: Export Sales Manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

Joint Chinese Ltd Product Similarity Declaration Product name: Smart Health Bracelet Model name: 2208A, 2208B, 2208C, 2208D, 2208E, 2208F, 2208G, 2208H, 2208I, 2208J FCC ID: 2AB73-2208A We (Joint Chinese 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., ), the only difference is the model name. Demonstrate the detail (descriptions and pictures) as to the difference list above. Signature: Name: Kathy Zhao Title: Export Sales Manager Date: 07.11.2023

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Joint Chinese Ltd Address: Building 6, Huafeng Tech Park, Luotian Industrial Area, Songgang Town, Bao’an District, Shenzhen, China Product Name: Smart Health Bracelet Model Number: 2208A, 2208B, 2208C, 2208D, 2208E, 2208F, 2208G, 2208H, 2208I, 2208J FCC Identifier: 2AB73-2208A We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Kathy Zhao Date: 7/11/2023 Title: Export Sales Manager Signature of applicant:

C5266091_X10_Ed.1 1/1 Joint Chinese Ltd Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 7/11/2023 Subject: Request for Confidentiality FCC ID: 2AB73-2208A To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality ID Label/Location No No Attestation Statement No No External Photos No Block Diagram Schematics Test Report No No Test Setup Photos No User’s Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Kathy Zhao Date: 7/11/2023 Title: Export Sales Manager

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Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] RF EXPOSURE Test Report Report No.: MTi230606006-01E2 Date of issue: 2023-06-28 Applicant: Joint Chinese Ltd Product: Smart Health Bracelet Model(s): 2208A, 2208B, 2208C, 2208D, 2208E, 2208F, 2208G, 2208H, 2208I, 2208J FCC ID: 2AB73-2208A Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 6- Report No.: MTi230606006-01E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Instructions 1. The report shall not be partially reproduced without the written consent of the laboratory; 2. The test results of this report are only responsible for the samples submitted; 3. This report is invalid without the seal and signature of the laboratory; 4. This report is invalid if transferred, altered or tampered with in any form without authorization; 5. Any objection to this report shall be submitted to the laboratory within 15 days from the date of receipt of the report. - Page 3 of 6- Report No.: MTi230606006-01E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Applicant: Joint Chinese Ltd Address: Building 6, Huafeng Tech Park, Luotian Industrial Area, Songgang Town, Bao’an District, Shenzhen, China Manufacturer: Joint Chinese Ltd Address: Building 6, Huafeng Tech Park, Luotian Industrial Area, Songgang Town, Bao’an District, Shenzhen, China Product description Product name: Smart Health Bracelet Trademark: N/A Model name: 2208A Serial Model: 2208B, 2208C, 2208D, 2208E, 2208F, 2208G, 2208H, 2208I, 2208J Standards: N/A Test method: KDB 447498 D01 v06 Date of Test Date of test: 2023-06-25 to 2023-06-28 Test result: Pass Test Engineer : (David) Reviewed By: : (Leon) Approved By: : (Tom Xue) - Page 4 of 6- Report No.: MTi230606006-01E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Table of Contents 1. STANDALONE SAR TEST EXCLUSION CONSIDERATIONS ............................................................................................ 5 2. SAR TEST EXCLUCSION THRESHOLDS ........................................................................................................................ 6 - Page 5 of 6- Report No.: MTi230606006-01E2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China. Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] 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(s), listed below, is (are) 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. The minimum test separation distance defined in 4.1 f) 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. To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified, typically in the SAR measurement or SAR analysis report, by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting are required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for 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. a) 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  The values 3.0 and 7.5 are referred to as numeric thresholds in step b) 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 4.1 f) is applied to determine SAR test exclusion. b) 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 (also illustrated in Appendix B): 1) {[Power allowed at numeric threshold for 50 mm in step a)] + [(test separation distance – 50 mm)·(f(MHz)/150)]} mW, for 100 MHz to 1500 MHz 2) {[Power allowed at numeric threshold…

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AT3216-B2R7HAAT/LF REV:2 PAGE:1/8 S-R00-N1152 ACX Advanced Ceramic X Features  Monolithic SMD with small, low-profile and light-weight type.  Wide bandwidth  RoHS compliant Applications Bluetooth/Wireless LAN/Home RF ISM band 2.4GHz applications Specifications Part Number Operating Frequency (MHz) Peak Gain （XZ-V） Average Gain （XZ-V） VSWR Impedance AT3216 -B2R7HAA_ 2400 ~ 2500 0.5 dBi typ. -0.5 dBi typ. 2 max. 50  Q’ty/Reel (pcs) : 3,000pcs Operating Temperature Range : -40 ~ +85 o C Storage Temperature Range : -40 ~ +85 o C Storage Period : 12 months max. Power Capacity : 3W max. Part Number  Type AT : Antenna  Dimensions ( L × W ) 3.2× 1.6 mm  Material Code B  Initial center frequency 2R7=2700MHz  Specification Code HAA  Packaging T: Tape & Reel B: Bulk  Soldering /LF=lead-free Terminal Configuration No. Terminal Name No. Terminal Name  Feeding Point  NC AT3216 Series Multilayer Chip Antenna   AT 3216 - B 2R7 HAA         AT3216-B2R7HAAT/LF REV:2 PAGE:2/8 S-R00-N1152 ACX Advanced Ceramic X Dimensions and Recommended PC Board Pattern Mark L W T a Dimensions 3.2±0.2 1.6±0.2 1.3+ 0.1/-0.2 0.5±0.3 (a) Without Matching Circuits (b) With Matching Circuits *Line width should be designed to match 50 characteristic impedance, depending on PCB material and thickness. * 2.6 4.2 1.6 1.9 0.4 Unit : mm L W a T 3.3nH 2.7nH 1.2pF AT3216-B2R7HAAT/LF REV:2 PAGE:3/8 S-R00-N1152 ACX Advanced Ceramic X Typical Electrical Characteristics (T=25 o C)  Test Board Return Loss (a) Without Matching Circuits (b) With Matching Circuits Ground 13.5mm 6.5mm 39.5mm 6.5mm Matching Circuit No Ground 50 Feed Line Antenna 4mm 19mm AT3216-B2R7HAAT/LF REV:2 PAGE:4/8 S-R00-N1152 ACX Advanced Ceramic X Radiation Patterns .... XZ cut @2.45GHz Vertical Horizontal YZ cut @2.45GHz Vertical Horizontal XZ-V/XZ-H YZ-V/YZ-H XY cut @2.45GHz Vertical Horizontal XY-V/XY-H 180 270 o 0 90 o X Z Y XY-cut scanning direction 180 o 270 o 0 o 90 o X Z Y XZ-cut scanning direction 180 o 270 o 0 o 90 o X Z Y YZ-cut scanning direction dBi dBi dBi AT3216-B2R7HAAT/LF REV:2 PAGE:5/8 S-R00-N1152 ACX Advanced Ceramic X Taping Specifications Tape Dimensions (Unit: mm) & Quantity Reel Dimensions (Unit: mm) Leader and Trailer Tape Type A A’ B C D E F T Quantity/reelTape material 3216 4.0± 0.1 4.0± 0.1 1.95± 0.1 3.50± 0.1 2.0± 0.05 3.5± 0.1 8.0± 0.1 1.60± 0.10 3,000pcs Plastic (Embossed) Type A B 3216 2.3±0.5 9.0±0.3 Trailer End Trailer (160 mm min.) Leader End Empty Compartments with Cover Tape (500 mm min.) 60±1 178± 1 13.5±0.5 A Label Label: Customer’s Name, ACX P/N, Q’ty, Date, ACX Corp. 1.4 ± 0.2 B A’ D F E 1.75 ± 0.1 AB EMBOSS TA P E T ∣ ∣ C AT3216-B2R7HAAT/LF REV:2 PAGE:6/8 S-R00-N1152 ACX Advanced Ceramic X Peel-off Force Peel-off force should be in the range of 0.1 – 0.6 N at a peel-off speed of 300±10 mm/min . Storage Conditions (1) Temperature: 5 ~35°C, relative humidity (RH): 45~75%. (2) Non-corrosive environment Notes The contents of this data sheet are subject to change without notice. Please confirm the specifications and delivery conditions when placing your order. Peeling Direction Top Cover Tape Carrier Tape <10 0 AT3216-B2R7HAAT/LF REV:2 PAGE:7/8 S-R00-N1152 ACX Advanced Ceramic X Mechanical & Environmental Characteristics Item Requirements Procedure Solderability 1. No apparent damage 2. More than 95% of the terminal electrode shall be covered with new solder 1. Preheat: 120 5 o C 2. Solder: 245 5 o C for 5 1 sec Soldering strength (Termination Adhesion) 1. 10N minimum 1. Solder specimen onto test jig. 2. Apply push force at 0.5mm/s until electrode pads are peeled off or ceramic are broken. Pushing force is applied to longitude direction Deflection (Substrate Bending) 1. No apparent damage 1. Solder specimen onto test jig (FR4, 1.6mm) using the recommend soldering profile. 2. Apply a bending force of 2mm deflection Heat/Humidity Resistance 1. No apparent damage 2. Fulfill the electrical specification after test 1. Temperature: 85 2 o C 2. Humidity: 90% ~ 95% RH 3. Duration: 1000±48hrs 4. Recovery: 1-2hrs Thermal shock (Temperature Cycle) 1. No apparent damage 2. Fulfill the electrical specification after test 1. One cycle/step 1：125 ± 5C for 30 min step 2：- 40 ± 5C for 30 min 2. No of cycles：100 3. Recovery:1-2 hrs Low Temperature Resistance 1. No apparent damage 2. Fulfill the electrical specification after test 1. Temperature: -40 5 o C 2. Duration: 500 ±24hrs 3. Recovery: 1-2hrs 90mm Pressure Rod R230 AT3216-B2R7HAAT/LF REV:2 PAGE:8/8 S-R00-N1152 ACX Advanced Ceramic X Soldering Conditions Typical Soldering Profile for Lead-free Process Reflow Soldering : Notes The contents of this data sheet are subject to change without notice. Please confirm the specifications and delivery conditions when placing your order. Temperature ( o C) Pre-heating 60-180s Time (s.) 20s max. 260 o C 150-200 o C 217 o C 60-150s. Advanced Ceramic X Corp. 16 Tzu Chiang Road, Hsinchu Industrial District Hsinchu Hsien 303, Taiwan TEL:886-3-5987008 FAX:886-3-5987001 E-mail: [email protected] http://www.acxc.com.tw

CFR47§2.911(d)(7)AgentDesignationAttestation Date:07-06-2023 FCCID:2AB73-2208A To:FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 JointChineseLtd.(“theapplicant”)asrequiredbysection2.911(d)(7),designatesthe followingagent,locatedintheUnitedStates,forpurposesofactingastheapplicant’sagent forserviceofprocess. Theapplicantacknowledgesthattheywillmaintainanagentfornolessthanoneyearafterthe granteehasterminatedallmarketingandimportationortheconclusionofanyCommission- relatedproceedinginvolvingtheequipment.Theapplicantfurtheracknowledgestheir responsibilitytoinformtheFCCwhenevertheagentinformationchanges. U.S.AgentInformation: JamesHe OasisCompliance,Inc. 3313VerdiDr,SanJose,CA95111 [email protected] cell:2026028330 Sincerelyyours, BoZhang Manager JointChineseLtd. Address:Building4&6,HuafengTechPark,GuangtianRoad,LuotianIndustrialArea, SonggangTown,Bao’anDistrict,Shenzhen,China Email:[email protected] Phone:+86-18126110817

Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Test Report Report No.: MTi230606006-01E1 Date of issue: 2023-06-28 Applicant: Joint Chinese Ltd Product: Smart Health Bracelet Model(s): 2208A, 2208B, 2208C, 2208D, 2208E, 2208F, 2208G, 2208H, 2208I, 2208J FCC ID: 2AB73-2208A Shenzhen Microtest Co., Ltd. http://www.mtitest.com Page 2 of 58 Report No.: MTi230606006-01E1 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Instructions 1. This test report shall not be partially reproduced without the written consent of the laboratory. 2. The test results in this test report are only responsible for the samples submitted 3. This test report is invalid without the seal and signature of the laboratory. 4. This test report is invalid if transferred, altered, or tampered with in any form without authorization. 5. Any objection to this test report shall be submitted to the laboratory within 15 days from the date of receipt of the report. Page 3 of 58 Report No.: MTi230606006-01E1 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Table of contents 1 General Description ......................................................................................................................... 5 1.1 Description of the EUT ............................................................................................................................... 5 1.2 Description of test modes .......................................................................................................................... 5 1.3 Environmental Conditions .......................................................................................................................... 7 1.4 Description of support units ....................................................................................................................... 7 1.5 Measurement uncertainty .......................................................................................................................... 7 2 Summary of Test Result .................................................................................................................. 8 3 Test Facilities and accreditations ................................................................................................... 9 3.1 Test laboratory ........................................................................................................................................... 9 4 List of test equipment .................................................................................................................... 10 5 Evaluation Results (Evaluation) .................................................................................................... 13 5.1 Antenna requirement ............................................................................................................................... 13 6 Radio Spectrum Matter Test Results (RF) .................................................................................... 13 6.1 Conducted Emission at AC power line .................................................................................................... 13 6.2 Maximum Conducted Output Power ........................................................................................................ 18 6.3 Power Spectral Density ........................................................................................................................... 20 6.4 Emissions in non-restricted frequency bands .......................................................................................... 21 6.5 Band edge emissions (Radiated) ............................................................................................................ 23 6.6 Emissions in restricted frequency bands (below 1GHz) .......................................................................... 28 6.7 Emissions in restricted frequency bands (above 1GHz) ......................................................................... 32 Photographs of the test setup ............................................................................................................. 36 Photographs of the EUT....................................................................................................................... 37 Appendix A: DTS Bandwidth ............................................................................................................... 39 Appendix B: Maximum conducted output power ............................................................................... 42 Appendix C: Maximum power spectral density .................................................................................. 45 Appendix D: Band edge measurements ............................................................................................. 48 Appendix E: Conducted Spurious Emission ...................................................................................... 50 Appendix F: Duty Cycle ....................................................................................................................... 56 Page 4 of 58 Report No.: MTi230606006-01E1 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel: (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Test Result Certification Applicant: Joint Chinese Ltd Address: Building 6, Huafeng Tech Park, Luotian Indust…

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Page 1 of 2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Appendix - Test Setup Photos Model: 2208A Radiated emissions –Below 1 GHz Radiated emissions –Above 1 GHz Page 2 of 2 Address: 101, No. 7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Te l : (86-755)88850135 Fax: (86-755) 88850136 Web: www.mtitest.com E-mail: [email protected] Conducted emissions ----End of Report----