2AURH-V25ZSmart Watch

Shenzhen Changtai Electronics Co., Ltd Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 9/4/2024 U.S. Agent Designation [Shenzhen Changtai Electronics 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: [2AURH-V25Z]): Name and company of U.S. agent: AOCE Corporation Inc. Physical U.S. address of agent: 6547 N Academy Bivd #2266, Colorado Springs, CO, 80918 United States FRN of U.S. agent: 0033401381 Email address of U.S. agent: [email protected] [AOCE Corporation Inc.] acknowledges their obligation to accept service of process on behalf of [Shenzhen Changtai Electronics Co., Ltd]. [Shenzhen Changtai Electronics Co., Ltd] with the FRN [0028875409] 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 [Name] Justin Wu [Title] Product manager [Company] Shenzhen Changtai Electronics Co., Ltd Signature [Name of U.S. agent] Johnson.wang [Title of U.S. agent] Manager [Company of U.S. agent] AOCE Corporation Inc. 48_[mo del] US_Agent_2.911(d)(7) - U, V04

Covered Equipment Identification Letter For Certification Service in the USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Section 2.911(d)(5)(ii) of the Commission’s Rules (47 C.F.R.) we attest as follows: We, applicant Company Name: Shenzhen Changtai Electronics Co., Ltd Address: Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Phone: +86-13410778119 certify 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. If you have any questions, please feel free to contact us at the address shown below. Sincerely, 2024-09-04 Signature Date Printed Name of Signee / Title: Justin Wu / Product Manager Company: Shenzhen Changtai Electronics Co., Ltd Address: Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Phone: +86-13410778119 Fax: +86-755-23286602 Email: [email protected]

Covered Equipment Attestation Letter For Certification Service in the USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Section 2.911(d)(5)(i)-(ii) of the Commission’s Rules (47 C.F.R.) we attest as follows for the product listed below: FCC ID Model name 2AURH-V25Z V25Z, V25Z Plus, V25Z Ultra, V25Z Pro, V17Z, V17Z Pro, V22Z, V23Z We, applicant Company Name: Shenzhen Changtai Electronics Co., Ltd Address: Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Phone: +86-13410778119 certify 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. If you have any questions, please feel free to contact us at the address shown below. Sincerely, 2024-09-04 Signature Date Printed Name of Signee / Title: Justin Wu / Product Manager Company: Shenzhen Changtai Electronics Co., Ltd Address: Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Phone: +86-13410778119 Fax: +86-755-23286602 Email: [email protected]

Confidentiality Request Letter For Certification Service in the USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern 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 request confidentiality for the documentation of the following products: FCC ID Model name 2AURH-V25Z V25Z, V25Z Plus, V25Z Ultra, V25Z Pro, V17Z, V17Z Pro, V22Z, V23Z For the products listed above, we request permanent confidentiality for all applicable exhibits as there are: • the Operational Description • the Block Diagram • the Schematics • the Part List • the Tune up Information The above listed exhibits contain trade secrets and proprietary information that could be of benefit to our competitors. If you have any questions, please feel free to contact us at the address shown below. Sincerely, 2024-09-04 Signature Date Printed Name of Signee / Title: Justin Wu / Product Manager Company: Shenzhen Changtai Electronics Co., Ltd Address: Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Phone: +86-13410778119 Fax: +86-755-23286602 Email: [email protected]

Short Term Confidentiality Request Letter For Certification Service in the USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21048 To whom it may concern Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and in accordance with the FCC Public notice dated June 15, 2004 (DA 04-1705), we request short term confidentiality prior to marketing the device for the documentation of the following products: FCC ID Model name 2AURH-V25Z V25Z, V25Z Plus, V25Z Ultra, V25Z Pro, V17Z, V17Z Pro, V22Z, V23Z For the products listed above, we request short term confidentiality for all applicable exhibits as there are: • External photos • Internal photos • Test setup photos • User manual The above listed exhibits contain business sensitive information which we wish to keep confidential until the actual marketing of our device, that is planned for: Short term confidentiality release date: < 180 days after issue of grant > If you have any questions, please feel free to contact us at the address shown below. Sincerely, 2024-09-04 Signature Date Printed Name of Signee / Title: Justin Wu / Product Manager Company: Shenzhen Changtai Electronics Co., Ltd Address: Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Phone: +86-13410778119 Fax: +86-755-23286602 Email: [email protected]

Shenzhen Changtai Electronics Co., Ltd Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Date: September 04, 2024 FCC ID: 2AURH-V25Z Model Number: V25Z, V25Z Plus, V25Z Ultra, V25Z Pro, V17Z, V17Z Pro, V22Z, V23Z To: Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21048 To Whom It May Concern, We, Shenzhen Changtai Electronics Co., Ltd hereby declare that our product (Smart Watch) Model Number: V25Z, V25Z Plus, V25Z Ultra, V25Z Pro, V17Z, V17Z Pro, V22Z, V23Z board, Schematic, Hardware version, Software version, structure and internal photos are same, appearances strap material, color and model name differently due to marketing purposes. Should you have any questions or comments regarding this matter, please have my best attention. Sincerely, (Signed) Printed Name of Signee / Title: Justin Wu / Product manager Company: Shenzhen Changtai Electronics Co., Ltd Address: Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Phone: +86-13410778119 Fax: +86-755-23286602 Email: [email protected]

Bottom of EUT Label FCC ID: 2AURH-V25Z Label Location

RF EXPOSURE EVALUATION FCC ID: 2AURH-V25Z According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in §1.1307(b): Routine SAR evaluation refers to that specifically required by §2.1093, using measurements or computer simulation. When routine SAR evaluation is not required, portable transmitters with output power greater than the applicable low threshold require SAR evaluation to qualify for TCB approval. BLE: Mode Channel (MHz) Maximum output power (dBm) Target Power (dBm) Tune up tolerance (dBm) Max Tune Up Power (dBm) Distanc e (mm) Calcula tion results Limit GFSK -1.15 -1.72 -1 ±1 0 5 0.310 3 -1.30 -1.56 -1 ±1 0 5 0.312 3 -2.00 -2.66 -2 ±1 -1 5 0.250 3 Test Results: PASS.

Antenna Dimensions Shenzhen Changtai Fuyuan Electronics Co., LTD 3rd Floor, Building G, No. 2070, Jincheng Road, Haoxiang Community, Shajing Street, Baoan District, Shenzhen Antenna Specification 1 PRODUCT INFORMATION 1.1Manufacturer Information ManufacturerShenzhen Changtai Fuyuan Electronics Co., LTD Address 3rd Floor, Building G, No. 2070, Jincheng Road, Haoxiang Community, Shajing Street, Baoan District, Shenzhen 1.2General Description for Equipment under Test (EUT) Model Name Under Test 2.4G BT-ANT Antenna Type Wire Antenna Dimensions 28mm±1*1mm±0.05 MAX. Gain-2.70dBi Antenna Type Wire 1.3Technical Information Frequencies2400~2500MHz Test Frequencies 2400MHz, 2410MHz, 2420MHz, 2430MHz, 2440MHz, 2450MHz 2460MHz, 2470MHz, 2480MHz, 2490MHz, 2500MHz 1.4Antenna shape Tested by:Luo YouningChecked by: Li ChenjiaApproved by:Sally Yu Shenzhen Changtai Fuyuan Electronics Co., LTD 3rd Floor, Building G, No. 2070, Jincheng Road, Haoxiang Community, Shajing Street, Baoan District, Shenzhen VSWR Frequency VSWR 2400MHz1.57 2450MHz1.76 2500MHz1.93 Shenzhen Changtai Fuyuan Electronics Co., LTD 3rd Floor, Building G, No. 2070, Jincheng Road, Haoxiang Community, Shajing Street, Baoan District, Shenzhen 3D Pattern B1.1 3D Pattern for 2400MHz B1.2 3D Pattern for 2450MHz ShenzhenChangtaiFuyuanElectronicsCo.,LTD 3rdFloor,BuildingG,No.2070,JinchengRoad,HaoxiangCommunity,ShajingStreet,BaoanDistrict, Shenzhen B1.33DPatternfor2500MHz ShenzhenChangtaiFuyuanElectronicsCo.,LTD 3rdFloor,BuildingG,No.2070,JinchengRoad,HaoxiangCommunity,ShajingStreet,BaoanDistrict,Shenzhen 1DRadiationPattern PHI=0 PHI=90 Shenzhen Changtai Fuyuan Electronics Co., LTD 3rd Floor, Building G, No. 2070, Jincheng Road, Haoxiang Community, Shajing Street, Baoan District, Shenzhen THETA=90 Frequency(MHz)Gain (dBi)Efficiency (%) 2400-2.7018 2410-2.9217 2420-3.0717 2430-3.0916 2440-3.4815 2450-3.7315 2460-3.7714 2470-3.8114 2480-3.6914 2490-3.9314 2500-4.1814 Antenna size diagram

Page 1 of 24 Report No.: 8232EU011906W-AD ANNEX D TEST DATA For Project No.: 8232EU011906W Client: Shenzhen Changtai Electronics Co., Ltd Product Name: Smart Watch Model No.: V25Z FCC ID: 2AURH-V25Z Technology: Bluetooth BLE Test Engineer: Test Date: 2024-08-27 Page 2 of 24 Report No.: 8232EU011906W-AD Test Summary Item Result Duty Cycle Pass Bandwidth Pass Maximum Conducted Output Power Pass Maximum Power Spectral Density Pass Unwanted Emissions In Non-restricted Frequency Bands Pass Page 3 of 24 Report No.: 8232EU011906W-AD 1. Duty Cycle 1.1 Test Result 1.1.1 Ant1 Ant1 Mode TX Type Frequency (MHz) T_on (ms) Period (ms) Duty Cycle (%) Duty Cycle Correction Factor (dB) Max. DC Variation (%) 1M SISO 2402 2.094 3.125 67.01 1.74 16.78 2440 2.095 3.125 67.04 1.74 16.78 2480 2.094 3.125 67.01 1.74 16.78 Page 4 of 24 Report No.: 8232EU011906W-AD 1.2 Test Graph 1.2.1 Ant1 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 5 of 24 Report No.: 8232EU011906W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 6 of 24 Report No.: 8232EU011906W-AD 2. Bandwidth 2.1 Test Result 2.1.1 OBW Mode TX Type Frequency (MHz) ANT 99% Occupied Bandwidth (MHz) Verdict Result Limit 1M SISO 2402 1 1.015 / Pass 2440 1 1.016 / Pass 2480 1 1.016 / Pass 2.1.2 6dB BW Mode TX Type Frequency (MHz) ANT 6dB Bandwidth (MHz) Verdict Result Limit 1M SISO 2402 1 0.645 >=0.5 Pass 2440 1 0.646 >=0.5 Pass 2480 1 0.644 >=0.5 Pass Page 7 of 24 Report No.: 8232EU011906W-AD 2.2 Test Graph 2.2.1 OBW 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 8 of 24 Report No.: 8232EU011906W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 9 of 24 Report No.: 8232EU011906W-AD 2.2.2 6dB BW 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 10 of 24 Report No.: 8232EU011906W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 11 of 24 Report No.: 8232EU011906W-AD 3. Maximum Conducted Output Power 3.1 Test Result 3.1.1 Power Mode TX Type Frequency (MHz) Maximum Peak Conducted Output Power (dBm) Verdict ANT1 Limit 1M SISO 2402 -1.72 <=30 Pass 2440 -1.56 <=30 Pass 2480 -2.66 <=30 Pass Page 12 of 24 Report No.: 8232EU011906W-AD 4. Maximum Power Spectral Density 4.1 Test Result 4.1.1 PSD Mode TX Type Frequency (MHz) Maximum PSD (dBm/3kHz) Verdict ANT1 Limit 1M SISO 2402 -17.08 <=8 Pass 2440 -17.33 <=8 Pass 2480 -18.02 <=8 Pass Page 13 of 24 Report No.: 8232EU011906W-AD 4.2 Test Graph 4.2.1 PSD 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 14 of 24 Report No.: 8232EU011906W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 15 of 24 Report No.: 8232EU011906W-AD 5. Unwanted Emissions In Non-restricted Frequency Bands 5.1 Test Result 5.1.1 Ref Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) 1M SISO 2402 1 -2.12 2440 1 -1.94 2480 1 -2.94 Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2020, the channel contains the maximum PSD level was used to establish the reference level. 5.1.2 CSE Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict 1M SISO 2402 1 -2.12 -22.12 Pass 2440 1 -1.94 -21.94 Pass 2480 1 -2.94 -22.94 Pass Note1: Refer to FCC Part 15.247 (d) and ANSI C63.10-2020, the channel contains the maximum PSD level was used to establish the reference level. Page 16 of 24 Report No.: 8232EU011906W-AD 5.2 Test Graph 5.2.1 Ref 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 17 of 24 Report No.: 8232EU011906W-AD 1M_HCH_2480MHz_Ant1_NTNV Page 18 of 24 Report No.: 8232EU011906W-AD 5.2.2 CSE 1M_LCH_2402MHz_Ant1_NTNV 1M_LCH_2402MHz_Ant1_NTNV Page 19 of 24 Report No.: 8232EU011906W-AD 1M_LCH_2402MHz_Ant1_NTNV 1M_LCH_2402MHz_Ant1_NTNV Page 20 of 24 Report No.: 8232EU011906W-AD 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 21 of 24 Report No.: 8232EU011906W-AD 1M_MCH_2440MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV Page 22 of 24 Report No.: 8232EU011906W-AD 1M_MCH_2440MHz_Ant1_NTNV 1M_HCH_2480MHz_Ant1_NTNV Page 23 of 24 Report No.: 8232EU011906W-AD 1M_HCH_2480MHz_Ant1_NTNV 1M_HCH_2480MHz_Ant1_NTNV Page 24 of 24 Report No.: 8232EU011906W-AD 1M_HCH_2480MHz_Ant1_NTNV 1M_HCH_2480MHz_Ant1_NTNV --------- End of Report -------

TEST REPORT Report No.: 8232EU011906W Applicant: Shenzhen Changtai Electronics Co., Ltd Address: Building#A1, 8th floor, The third industrial Park DaWangShan, Shajing Town, BaoAn District, Shenzhen, China Product Name: Smart Watch Model No.: V25Z (refer to clause 2.4) Trademark: OEM FCC ID: 2AURH-V25Z Test Standard(s): 47 CFR Part 15 Subpart C Date of Receipt: Aug. 19, 2024 Test Date: Aug. 19, 2024 – Sep. 02, 2024 Date of Issue: Sep. 04, 2024 ISSUED BY: SHENZHEN EU TESTING LABORATORY LIMITED Prepared by: Reviewed and Approved by: ____________________ _____________________ Mikey Zhu/ Engineer Sally Zhang/ Manager Page 2 of 33 Report No.: 8232EU011906W TRF No.: FCC Part 15.247_BLE (A01) Revision Record Report Version Issued Date Description Status V0 Sep. 04, 2024 Original Valid Page 3 of 33 Report No.: 8232EU011906W TRF No.: FCC Part 15.247_BLE (A01) Table of Contents 1 COVER PAGE .................................................................................................................................... 1 2 GENERAL INFORMATION .......................................................................................................................5 2.1 APPLICANT INFORMATION ...................................................................................................................5 2.2 MANUFACTURER INFORMATION ...........................................................................................................5 2.3 FACTORY INFORMATION ......................................................................................................................5 2.4 GENERAL DESCRIPTION OF E.U.T. ......................................................................................................5 2.5 TECHNICAL INFORMATION OF E.U.T. ...................................................................................................6 3 TEST SUMMARY .......................................................................................................................................7 3.1 TEST STANDARD ................................................................................................................................7 3.2 TEST VERDICT ....................................................................................................................................7 3.3 TEST LABORATORY ............................................................................................................................7 4 TEST CONFIGURATION ...........................................................................................................................8 4.1 TEST ENVIRONMENT ...........................................................................................................................8 4.2 TEST EQUIPMENT ...............................................................................................................................8 4.3 DESCRIPTION OF SUPPORT UNIT .........................................................................................................9 4.4 TEST MODE........................................................................................................................................9 4.5 DESCRIPTION OF CALCULATION ..........................................................................................................9 4.6 MEASUREMENT UNCERTAINTY ......................................................................................................... 10 4.7 DEVIATION FROM STANDARDS ......................................................................................................... 10 4.8 ABNORMALITIES FROM STANDARD CONDITION ................................................................................. 10 5 TEST ITEMS ........................................................................................................................................... 11 5.1 ANTENNA REQUIREMENT .................................................................................................................. 11 5.1.1 Test Requirement .............................................................................................................. 11 5.1.2 Antenna Anti-Replacement Construction .......................................................................... 11 5.1.3 Antenna Gain .................................................................................................................... 11 5.2 CONDUCTED EMISSION AT AC POWER LINE ..................................................................................... 12 5.2.1 Test Requirement .............................................................................................................. 12 5.2.2 Test Setup Diagram .......................................................................................................... 12 5.2.3 Test Procedure .................................................................................................................. 12 5.2.4 Test Data ........................................................................................................................... 12 5.3 OCCUPIED BANDWIDTH ................................................................................................................... 15 5.3.1 Test Requirement .............................................................................................................. 15 5.3.2 Test Setup Diagram .......................................................................................................... 15 5.3.3 Test Procedure .................................................................................................................. 15 5.3.4 Test Data ........................................................................................................................... 15 5.4 MAXIMUM CONDUCTED OUTPUT POWER .......................................................................................... 16 5.4.1 Test Requirement ..................................…

Text truncated - open the document above for the full version.