2BGAF-C2Smart 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 against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following 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 HTT Technology Co., Ltd. Report No.: HTT202606263 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 4 Product Name: Smart Ring Model No.: C2 EUT Constructional Details External Photo Report No.: HTT202606263 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 4 Report No.: HTT202606263 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 4 Report No.: HTT202606263 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 4 ------End------

Label and Location Size: L: 1.0cm*W: 0.2cm Label and Location FCC ID : 2BGAF-C2

Shenzhen HTT Technology Co., Ltd. Report No.: HTT202606263 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 3 Product Name: Smart Ring Model No.: C2 EUT Constructional Details Internal Photo Report No.: HTT202606263 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 3 Report No.: HTT202606263 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 3 ------End------ ANTENNA

Shenzhen HTT Technology Co., Ltd. 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 1 of 8 RF Exposure evaluation Report Reference No. ..................... : FCC ID............................................. : HTT202606263F02 2BGAF-C2 Compiled by ( position+printed name+signature) . : File administrators Heber He Supervised by ( position+printed name+signature) . : Project Engineer Bruce Zhu Approved by ( position+printed name+signature) . : RF Manager Kevin Yang Date of issue .................................... : Jul. 01, 2026 Testing Laboratory Name .............. : Shenzhen HTT Technology Co.,Ltd. Address ............................................ : 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao’an District, Shenzhen, Guangdong, China Applicant’s name ............................ : SHENZHEN TUBASHU E-COMMERCE CO., LTD. Address ............................................ : 31c, Blk 1, Dijingfeng, Maoyecheng, 2141 Longgang Av., Longgang Dist. Shenzhen China Standard ........................................... : 47CFR §1.1310 47CFR §2.1093 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen HTT 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 HTT Technology Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HTT 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 Ring Manufacturer .................................... : SHENZHEN TUBASHU E-COMMERCE CO., LTD. Trade Mark ........................................ N/A Model/Type reference ...................... : C2 Rating ............................................... : DC 3.7V From Battery and DC 5V From External Circuit Result ............................................... : PASS Report No.: HTT202606263F02 Page 2 of 8 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 8 T E S T R E P O R T Equipment under Test : Smart Ring Model /Type : C2 Listed Models : A03, N03, ZIKR3-16D,ZIKR1S-22B, ZIKR1S-20B, ZIKR1S-18B, ZIKR1S-22C, ZIKR1S- 20C, ZIKR1S-18C, ZIKR3-22D, ZIKR3-20D, ZIKR3-18D, ZIKR3-22E, ZIKR3-20E, ZIKR3-16E, ZIKR1S-22A, ZIKR1-22A, ZIKR1-20A, ZIKR1-18A, ZIKR1-22Ae, ZIKR1-20Ae, ZIKR1- 18Ae, ZIKR1-22B, ZIKR1-20B, ZIKR1-18B, ZIKR1-22C, ZIKR1-20C, ZIKR1-18C, ZIKR1-16C Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number is different for these model. Applicant : SHENZHEN TUBASHU E-COMMERCE CO., LTD. Address : 31c, Blk 1, Dijingfeng, Maoyecheng, 2141 Longgang Av., Longgang Dist. Shenzhen China Manufacturer : SHENZHEN TUBASHU E-COMMERCE CO., LTD. Address : 31c, Blk 1, Dijingfeng, Maoyecheng, 2141 Longgang Av., Longgang Dist. Shenzhen 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.: HTT202606263F02 Page 3 of 8 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 8 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 Special Accessories 5 2.4 Modifications 5 3 T E S T E N V I R O N M E N T 6 3.1 Address of the test laboratory 6 3.2 Test Facility 6 3.3 Statement of the measurement uncertainty 6 4 T E S T L I M I T 7 4.1 Requirement 7 4.2 Conducted Power Results 8 4.3 Manufacturing tolerance 8 4.4 Evaluation Result 8 4.5 Simultaneous Transmission for SAR Exclusion 8 5 C O N C L U S I O N 8 Report No.: HTT202606263F02 Page 4 of 8 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 4 of 8 1 T E S T S T A N D A R D S The tests were performed according to following standards: ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz. FCC KDB 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Device, RF Exposure, Equipment Authorization Procedures. FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits. FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices Report No.: HTT202606263F02 Page 5 of 8 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 5 of 8 2 S U M M A R Y 2.1 General Remarks Date of receipt of test sample : Jun. 04, 2026 Testing commenced on : Jun. 04, 2026 Testing concluded on : Jul. 01, 2026 2.2 Product Description Product Description: Smart Ring Model/Type reference: C2 Power supply: DC 3.7V From Battery and DC 5V From External Circuit Adapter Information (Auxiliary test provided by the lab): Model: GS-0500200 Input: AC100-240V, 50/60Hz, 0.3A max Output: DC 5V, 2A Testing sample ID： HTT202606263-1# (Engineer sam…

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1.AntennaDescription: AntennatypeChipantenna Model2.4GANT Frequencyrange2400-2500MHz ManufacturerSHENZHENTUBASHUE-COMMERCECO.,LTD. Address31c,Blk1,Dijingfeng,Maoyecheng,2141LonggangAv., LonggangDist.ShenzhenChina ANTPeakGain1.50dBi 2.AntennaPhoto: 3.TestEquipment&Conditions 3.1Testinstrument VSWRistestedusingAgilentE5071Bconnectedto ahandmechanism,andthestatusisfreespace. 3.2Testenvironmentandmethods 4．AntennaRadiationPattern 2400MHz 2450MHz 2500MHz

1 Appendix RF Test Data for BLE Company: : SHENZHEN TUBASHU E-COMMERCE CO., LTD. EUT : Smart Ring FCC ID: : 2BGAF-C2 Model Number : C2 Report No. : HTT202606263F01 Reviewed By : Heber He 2 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 0.088 0.625 14.08 8.51 0.00 2440 0.089 0.625 14.24 8.46 0.00 2480 0.089 0.625 14.24 8.46 0.00 3 1.2 Test Graph 1.2.1 Ant1 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 4 1M_HCH_2480MHz_Ant1_NTNV 5 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 1.149 / Pass 2440 1 1.170 / Pass 2480 1 1.206 / Pass 2.1.2 6dB BW Mode TX Type Frequency (MHz) ANT 6dB Bandwidth (MHz) Verdict Result Limit 1M SISO 2402 1 0.513 >=0.5 Pass 2440 1 0.526 >=0.5 Pass 2480 1 0.539 >=0.5 Pass 6 2.2 Test Graph 2.2.1 OBW 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 7 1M_HCH_2480MHz_Ant1_NTNV 8 2.2.2 6dB BW 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 9 1M_HCH_2480MHz_Ant1_NTNV 10 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 -0.64 <=30 Pass 2440 0.35 <=30 Pass 2480 0.85 <=30 Pass 11 4. Maximum Power Spectral Density 4.1 Test Result 4.1.1 PSD Mode TX Type Frequency (MHz) Maximum PSD (dBm) Verdict ANT1 Limit(dBm/3kHz) 1M SISO 2402 -0.76dBm/100kHz <=8 Pass 2440 0.24dBm/100kHz <=8 Pass 2480 0.74dBm/100kHz <=8 Pass 12 4.2 Test Graph 4.2.1 PSD 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 13 1M_HCH_2480MHz_Ant1_NTNV 14 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 -0.75 2440 1 0.24 2480 1 0.71 5.1.2 CSE Mode TX Type Frequency (MHz) ANT Level of Reference (dBm) Limit (dBm) Verdict 1M SISO 2402 1 -0.75 -20.75 Pass 2440 1 0.24 -19.76 Pass 2480 1 0.71 -19.29 Pass 15 5.2 Test Graph 5.2.1 Ref 1M_LCH_2402MHz_Ant1_NTNV 1M_MCH_2440MHz_Ant1_NTNV 16 1M_HCH_2480MHz_Ant1_NTNV 17 5.2.2 CSE 1M_LCH_2402MHz_Ant1_NTNV 1M_LCH_2402MHz_Ant1_NTNV 18 1M_MCH_2440MHz_Ant1_NTNV 1M_HCH_2480MHz_Ant1_NTNV 19 1M_HCH_2480MHz_Ant1_NTNV

Shenzhen HTT Technology Co., Ltd. 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 FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ...................: FCC ID. ......................................... : HTT202606263F01 2BGAF-C2 Compiled by ( position+printed name+signature) : File administrators Heber He Supervised by ( position+printed name+signature) : Project Engineer Bruce Zhu Approved by ( position+printed name+signature) : RF Manager Kevin Yang Date of issue ...................................: Jul. 01, 2026 Testing Laboratory Name .............: Shenzhen HTT Technology Co.,Ltd. Address ...........................................: 1F, Building B, Huafeng International Robotics Industrial Park, Hangcheng Road,Nanchang Community, Xixiang Street, Bao’an District, Shenzhen, Guangdong, China Applicant’s name...........................: SHENZHEN TUBASHU E-COMMERCE CO., LTD. Address ...........................................: 31c, Blk 1, Dijingfeng, Maoyecheng, 2141 Longgang Av., Longgang Dist. Shenzhen China Test specification ......................... : Standard ..........................................: FCC Part 15.247 Shenzhen HTT 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 HTT Technology Co.,Ltd. is acknowledged as copyright owner and source of the material. Shenzhen HTT 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. Equipment description ................ : Smart Ring Trade Mark ......................................: N/A Manufacturer ...................................: SHENZHEN TUBASHU E-COMMERCE CO., LTD. Model/Type reference .....................: C2 Listed Models ..................................: A03, N03, ZIKR3-16D,ZIKR1S-22B, ZIKR1S-20B, ZIKR1S-18B, ZIKR1S-22C, ZIKR1S- 20C, ZIKR1S-18C, ZIKR3-22D, ZIKR3-20D, ZIKR3-18D, ZIKR3-22E, ZIKR3-20E, ZIKR3-16E, ZIKR1S-22A, ZIKR1-22A, ZIKR1-20A, ZIKR1-18A, ZIKR1-22Ae, ZIKR1-20Ae, ZIKR1- 18Ae, ZIKR1-22B, ZIKR1-20B, ZIKR1-18B, ZIKR1-22C, ZIKR1-20C, ZIKR1-18C, ZIKR1-16C Modulation ......................................: GFSK Frequency ........................................ From 2402MHz to 2480MHz Ratings ............................................: DC 3.7V From Battery and DC 5V From External Circuit Result ..............................................: PASS Report No.: HTT202606263F01 Page 2 of 36 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 T E S T R E P O R T Equipment under Test : Smart Ring Model /Type : C2 Listed Models : A03, N03, ZIKR3-16D,ZIKR1S-22B, ZIKR1S-20B, ZIKR1S-18B, ZIKR1S-22C, ZIKR1S- 20C, ZIKR1S-18C, ZIKR3-22D, ZIKR3-20D, ZIKR3-18D, ZIKR3-22E, ZIKR3-20E, ZIKR3-16E, ZIKR1S-22A, ZIKR1-22A, ZIKR1-20A, ZIKR1-18A, ZIKR1-22Ae, ZIKR1-20Ae, ZIKR1- 18Ae, ZIKR1-22B, ZIKR1-20B, ZIKR1-18B, ZIKR1-22C, ZIKR1-20C, ZIKR1-18C, ZIKR1-16C Model difference : The PCB board, circuit, structure and internal of these models are the same, Only model number is different for these model. Applicant : SHENZHEN TUBASHU E-COMMERCE CO., LTD. Address : 31c, Blk 1, Dijingfeng, Maoyecheng, 2141 Longgang Av., Longgang Dist. Shenzhen China Manufacturer : SHENZHEN TUBASHU E-COMMERCE CO., LTD. Address : 31c, Blk 1, Dijingfeng, Maoyecheng, 2141 Longgang Av., Longgang Dist. Shenzhen 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.: HTT202606263F01 Page 3 of 36 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 Contents 1 TEST STANDARDS .......................................................................................................................................... 4 2 SUMMARY ........................................................................................................................................................ 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 configuration .................................................................................................................................... 5 2.6 EUT operation mode ............................................................................................................................... 6 2.7 Block Diagram of Test Setup .................................................................................................................. 6 2.8 Related Submittal(s) / Grant (s) .............................................................................................................. 6 2.9 Modifications ........................................................................................................................................... 6 3 TEST ENVIRONMENT .....…

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Shenzhen HTT Technology Co., Ltd. Report No.: HTT202606263 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.: C2 Test Setup Photo Radiated Emission Report No.: HTT202606263 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 RF Test ------End------