2BKUZ-CR10smart ring

FCC Warnning: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection againstharmful interference in a residential installation. This equipment generates, uses and can radiateradio frequency energy and, if not installed and used in accordance with the instructions, maycause harmful interference to radio communications. However, there is no guarantee thatinterference will not occur in a particular installation. If this equipment does cause harmfulinterference to radio or television reception, which can be determined by turning the equipmentoff and on, the user is encouraged to try to correct the interference by one or more of thefollowing measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 0cm between the radiator and your body.

Shenzhen Youjie Intelligent Technology Co., LTD No.8, Qianhai Kexing Science Park, Xixiang Street Labor Community Baoan District, Shenzhen China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024-9-14 To whom it may concern: We, Shenzhen Youjie Intelligent Technology Co., LTD, hereby certify that the equipment for which authorization is sought (FCC ID: 2BKUZ-CR10) is not “covered” equipment prohibited from receiving an equipment authorization pursuant to § 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, we are not identified on the Covered List (https://www.fcc.gov/supplychain/coveredlist) as an entity producing “covered” equipment. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(b) and (d)(5) and (6). 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. Sincerely, Signature Jie Su Manager Shenzhen Youjie Intelligent Technology Co., LTD 62_[model] CoveredEqu_2.911(d)(5)(i) and (ii) - U, V03

Shenzhen Youjie Intelligent Technology Co., LTD Add: No.8, Qianhai Kexing Science Park, Xixiang Street Labor Community Baoan District, Shenzhen China Date: 2024-9-14 FCC ID: 2BKUZ-CR10 Dear Sir/Madam, We, Shenzhen Youjie Intelligent Technology Co., LTD Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number is different for these model: Product name: smart ring Model no.: CR10, CR20, CR30, R08, R18, M08, M10, M20, M30, M60, ER10, ER20, ER30, CE10, CE20, CE30, CR01, CR02, CR03, CR05, CR06, CR07, CR08, CR09, CR12, CE01, CE02, CE03，CE05, CE06, CE07, CE12 Sincerely, Name/Title： Jie Su/Manager Company: Shenzhen Youjie Intelligent Technology Co., LTD Address: No.8, Qianhai Kexing Science Park, Xixiang Street Labor Community Baoan District, Shenzhen China Phone: 13603034005 Fax: N/A E-Mail: [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date:<2024-9-14> Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: FCC ID Model name 2BKUZ-CR10 CR10 For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title： Jie Su/Manager Company: Shenzhen Youjie Intelligent Technology Co., LTD Address: No.8, Qianhai Kexing Science Park, Xixiang Street Labor Community Baoan District, Shenzhen China Phone: 13603034005 Fax: N/A E-Mail: [email protected]

Shenzhen Youjie Intelligent Technology Co., LTD No.8, Qianhai Kexing Science Park, Xixiang Street Labor Community Baoan District, Shenzhen China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024-9-14 To whom it may concern: We, the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2BKUZ-CR10 including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. By signing this application form, we agree to Eurofins’ current valid General Terms and Conditions (AGB),Testing and Certification Regulations (PZO) which can be viewed on following website www.eurofins.de/ee or retrieved on request. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Name/Title： Jie Su/Manager Company: Shenzhen Youjie Intelligent Technology Co., LTD Address: No.8, Qianhai Kexing Science Park, Xixiang Street Labor Community Baoan District, Shenzhen China Phone: 13603034005 Fax: N/A E-Mail: [email protected]

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 5 Product Name: smart ring Model No.: CR10 EUT Constructional Details External Photo Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 5 Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 3 of 5 Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 4 of 5 Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 5 of 5 ------End------

Label and Location Size: L: 1.0cm*W: 0.2cm Label and Location FCC ID : 2BKUZ-CR10

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 2 Product Name: smart ring Model No.: CR10 EUT Constructional Details Internal Photo Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 2 ------End------

RF Exposure evaluation FCC ID: 2BKUZ-CR10 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 19 Channel 39 Target (dBm) -4.0 -5.0 -6.0 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 BLE 2.450 5 -3.0 0.5012 0.1569<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.........................

SMDCERAMICANTENNA DataSheet TSUN TECHNOLOGY CO., LTD . Rev.1.0 TS3216E245D05 For2400-2484MHz 3.2x1.6mm[EIA1206] SHAPES AND DIMENSIONSDimensions inmm FEATURES ・Lightweight,compact ・ Widebandwidth,lowcost ・ Built-inantennawithhighgain APPLICATIONS ・ Bluetooth ・ IEEE802.11g/b ・ Zigbeesystems,etc... Rev.1.0|2 TSUN TECHNOLOGY CO., LTD DataSheet SMDCERAMICANTENNA TS3216E245D05 LW A A1H 3.2±0.11.6±0.10.15±0.05 0.4±0.150.55±0.1 正面 底面 ✷切記: SMT貼片需黑色面朝上 PARTNUMBERINGSYSTEM TS -3216 -E - Brand Dimension Material 2450 -D -05 FrequencyFeeding modeType Rev.1.0|3 TSUN TECHNOLOGY CO., LTD DataSheet SMDCERAMICANTENNA Electrical Characteristics per line(TA=25°C) T yp icalCharacteristics Fig.1VSWR 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 2200 2300 2600 24002500 Frequency[MHz] 2700 V . S . W . R . Parameter Specification Units FrequencyBand 2400~2483 MHz P o l a riz at i o n Linear P eakGa in 2.71 dB i P ea kEffi c i e n c y 68.8%% Im p endance 50  Rev.1.0|4 TSUN TECHNOLOGY CO., LTD DataSheet SMDCERAMICANTENNA RadiationPattern Th eGa inp atte rni smeasu r edi n FAR - fi e l dc h a m be r .DU T isplacedon t h etab l e o fr otato r ,asta n da r dho r na n te nn aa n dVecto rN et w o rk Analyzerisusedtocollect data. Fig.2FAR-fieldChamber 3DGainPattern(2400MHz) Rev.1.0|5 TSUN TECHNOLOGY CO., LTD DataSheet SMDCERAMICANTENNA 3DGainPattern(2450 MHz) 3DGainPattern(2500MHz) Rev.1.0|6 TSUN TECHNOLOGY CO., LTD DataSheet SMDCERAMICANTENNA Gain（dB） Eiciency（%） Rev.1.0|7 TSUN TECHNOLOGY CO., LTD DataSheet SMDCERAMICANTENNA Item Condition Specification Thermalshock 1.30±3minutesat-40°C±5°C, 2.Convertto+105°C(5minutes) 3.30±3minutesat+105°C±5°C, 4.Convertto-40°C(5minutes) 5.Total100continuouscycles Noapparentdamage Fulfilltheelectrical spec.aftertest. Humidityresistance 1.Humidity:85%R.H. 2.Temperature:85±5°C 3.Time:1000hours. Noapparentdamage Fulfilltheelectrical spec.aftertest. Hightemperature resistance Noapparentdamage Fulfilltheelectrical spec.aftertest. 1.Temperature:150°C±5°C 2.Time:1000hours. Lowtemperature resistance 1.Temperature:-40°C±5°C 2.Time:1000hours. Noapparentdamage Fulfilltheelectrical spec.aftertest. Solderingheatresistance 1.Solderbathtemperature:260±5°C 2.Bathingtime:10±1seconds Noapparentdamage Solderability Thedippedsurfaceoftheterminalshallbe atleast95%coveredwithsolderafterdipped insolderbathof245±5°Cfor3±1seconds. Noapparentdamage (2))StorageCondition (a)Atwarehouse:Thetemperatureshouldbewithin0~30°Candhumidityshould be lessthan60%RH.Theproductshouldbeusedwithin1yearfromthetimeof elivery. (b)Onboard:Thetemperature shouldbewithin-40~85°Candhumidityshould belessthan85%RH. (3)OperatingTemperatureRange Operatingtemperaturerange:-40°Cto+85°C. Recommended ReflowSoldercurve PACKAGINGSTYLE REELDIMENSIONS Rev.1.0|8 TSUN TECHNOLOGY CO., LTD DataSheet SMDCERAMICANTENNA (1))SolderingGunProcedure Notethefollows,incaseofusingsoldergunforreplacement. (a)Thetiptemperaturemustbelessthan350°Cfortheperiodwithin3 seconds byusingsolderinggununder30W. (b)Thesolderingguntipshallnottouchthisproductdirectly. (2)SolderingVolume Notethatexcessofsolderingvolumewilleasilygetcrackthebodyof thisproduct. Device Package NetWeight Carrier Quantity HSFStatus TS3216E245D05 3216 0.0089g Tape&Reel 5000pcs RoHScompliant Date RevisionDescriptionofchanges 2018-11-51.0 FirstVersion 2022-12-9 1.1 Updatethepackageinformation OrderInformation Revisionhistor y Thecontentsofthisdatasheetaresubjecttochangewithoutnotice. Pleaseconfirmthespecificationsanddeliveryconditionswhenplacingyourorder. ©Copyright2015，Allrightsreserved Rev.1.0|9 TSUN TECHNOLOGY CO., LTD DataSheet SMDCERAMICANTENNA TAPEDIMENSIONS Feature S p ecifications Tolerances W 8 .00±0.30 P4.00±0.10 E 1.75 ± 0 .1 0 F3.50±0.10 P22.00±0.10 D1.50 + 0.10 - 0 . 00 P o 4. 00 ± 0 .1 0 10Po40.00±0.20 TypingQuantity:5000pieces per7” reel

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202408735F01 This results shown in this test report refer only to the sample(s) tested, this test report cannot be reproduced, except in full, without prior written permission of the company. The report would be invalid without specific stamp of test institute and the signatures of compiler and approver. Page 1 of 30 TEST Report Applicant: Shenzhen Youjie Intelligent Technology Co., LTD Address of Applicant: No.8, Qianhai Kexing Science Park, Xixiang Street Labor Community, Baoan District, Shenzhen Manufacturer : Shenzhen Youjie Intelligent Technology Co., LTD Address of Manufacturer : No.8, Qianhai Kexing Science Park, Xixiang Street Labor Community, Baoan District, Shenzhen Equipment Under Test (EUT) Product Name: smart ring Model No.: CR10 Series model: CR20, CR30, R08, R18, M08, M10, M20, M30, M60, ER10, ER20, ER30, CE10, CE20, CE30, CR01, CR02, CR03, CR05, CR06, CR07, CR08, CR09, CR12, CE01, CE02, CE03，CE05, CE06, CE07, CE12 Trade Mark: N /A FCC ID: 2BKUZ-CR10 Applicable standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247 Date of sample receipt: Aug. 27, 2024 Date of Test: Aug. 27, 2024 ~ Sep. 02, 2024 Date of report issued: Sep. 02, 2024 Test Result : PASS * * In the configuration tested, the EUT complied with the standards specified above. Report No.: HTT202408735F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 2 of 30 1. Version Version No. Date Description 00 Sep. 02, 2024 Original Tested/ Prepared By Date: Sep. 02, 2024 Project Engineer Check By: Date: Sep. 02, 2024 Reviewer Approved By : Date: Sep. 02, 2024 Authorized Signature Report No.: HTT202408735F01 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China Page 3 of 30 2. Contents Page 1. VERSION ........................................................................................................................................................ 2 2. CONTENTS .................................................................................................................................................... 3 3. TEST SUMMARY ........................................................................................................................................... 4 4. GENERAL INFORMATION ............................................................................................................................ 5 4.1. GENERAL DESCRIPTION OF EUT ................................................................................................................ 5 4.2. TEST MODE ............................................................................................................................................... 7 4.3. DESCRIPTION OF SUPPORT UNITS .............................................................................................................. 7 4.4. DEVIATION FROM STANDARDS .................................................................................................................... 7 4.5. ABNORMALITIES FROM STANDARD CONDITIONS ........................................................................................... 7 4.6. TEST FACILITY ........................................................................................................................................... 7 4.7. TEST LOCATION ......................................................................................................................................... 7 4.8. ADDITIONAL INSTRUCTIONS ........................................................................................................................ 7 5. TEST INSTRUMENTS LIST ........................................................................................................................... 8 6. TEST RESULTS AND MEASUREMENT DATA ........................................................................................... 9 6.1. CONDUCTED EMISSIONS ............................................................................................................................ 9 6.2. CONDUCTED OUTPUT POWER .................................................................................................................. 12 6.3. CHANNEL BANDWIDTH .............................................................................................................................. 13 6.4. POWER SPECTRAL DENSITY ..................................................................................................................... 15 6.5. BAND EDGES ........................................................................................................................................... 17 6.5.1 Conducted Emission Method .......................................................................................................... 17 6.5.2 Radiated Emission Method ............................................................................................................. 18 6.6. SPURIOUS EMISSION ................................................................................................................................ 20 6.6.1 Conducted Emission Method .......................................................................................................... 20 6.6.2 Radiated Emission Method ............................................................................................................. 22 6.7. ANTENNA REQUIREMENT .......................................................................................................................... 29 7. TEST SETUP PHOTO .............................................................................................................…

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Shenzhen HTT Technology Co., Ltd. Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 1 of 2 Product Name: smart ring Model No.: CR10 Test Setup Photo Radiated Emission Report No.: HTT202408735 Shenzhen HTT Technology Co.,Ltd. Tel: 0755-23595200 Fax: 0755-23595201 1F, Building B, Huafeng International Robotics Industrial Park,Hangcheng Road, Nanchang Community, Xixiang Street, Bao'an District, Guangdong Province, Shenzhen, China Page 2 of 2 Conducted Emission ------End------