ST2-IT7210Safety 2.0 Bracelet

Rev 1/26/2023 CenTrak Inc Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 8 December 2025 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: ST2-IT7210 CenTrak Inc (“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. Sincerely, Sherre Staves Rev 1/26/2023 CenTrak Inc Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 8 December 2025 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: ST2-IT7210 CenTrak Inc (“the applicant”) 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. CenTrak Inccertifies that, as of the date of the filling of the application, the applicant is not identified on the Cover list (as specifically named entity or any of its subsidiaries or affiliates) as an entity producing”covered equipment. Sincerely, Sherre Staves

UNITED STATES DESIGNATED AGENT LETTER Date: December 11, 2025 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Applicant U.S. designated agent Company Name: Centrak, Inc. Company Name: Centrak, Inc. Contact Name: Sherre Staves Contact Name: Sherre Staves Address: 826 Newtown Yardley Road Newtown Pennsylvania United States 18940 Address: 826 Newtown Yardley Road Newtown Pennsylvania United States 18940 City/Province/Zip: Newtown City/Province/Zip: Newtown, PA, 18940 Telephone: 215-860-2928 Telephone: 215-860-2928 Email: [email protected] Email: [email protected] FRN: 0012361903 FRN: 0012361903 Applicable Equipment: FCC ID: ST2-IT7210 ATTN: Director of Certification: We, < Centrak, Inc.> and <Picus Advisors US LLC> understand and acknowledge the applicants consent and the designated agent’s obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and e-mail of the designated agent listed above. We, <Centrak, Inc.> and <Picus Advisors US LLC> acknowledge the applicant’s acceptance of 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. Applicant ST2-IT7210 U.S. designated agent Name (Printed): Sherre Staves Name (Printed): Sherre Staves Title: Technical Program Management Advisor • Executive Mgmt - Other Depts. Title: Technical Program Management Advisor • Executive Mgmt - Other Depts. Signature: Signature:

Centrak, Inc. Date: 8 December 2025 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Attestation Section 2.911(d)(5)(i) and Section 2.911(d)(5)(ii) (KDB 986446 D01 Covered Equipment) Section 2.911(d)(5)(i) Centrak, Inc. (“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 software to be loaded prior to marketing of the equipment identified below is not "covered" software manufactured by any entity including predecessors, successors, parents, subsidiaries, or affiliates or any entity which has rebranded or relabeled the software produced by the entity(ies) identified on the "Covered List" DA 24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Centrak, Inc. (“the applicant”) further certifies that no 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 is installed in the equipment being certified. Section 2.911(d)(5)(ii) Centrak, Inc. (“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. Type of Equipment subject to FCC Certification: FCC ID: ST2-IT7210 If you have any questions, please feel free to contact me Contact Person: Sherre Staves Position in the Company: Manager Date of Signature: _____________________ Signatory (signature of the applicant)

Date: 8 December 2025 Centrak, Inc. To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 To Whom It May Concern: The Centrak, Inc., the undersigned, hereby authorizes Mr. Wu Xuewen from Shenzhen BALUN Technology Co., Ltd., to act on the behalf of the Centrak, Inc. solely in matters relating to the application for an FCC equipment authorization for FCC ID: ST2-IT7210 including the signing of documents in connection with this Application. Necessary acts carried out by Shenzhen BALUN Technology Co., Ltd. in connection with the Application shall have the same effect as acts of the Centrak, Inc. The Centrak, Inc.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. Section 862. Yours Sincerely, _______ Sherre Staves

Date: 8 December 2025 Centrak, Inc. To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 Re: Centrak, Inc. FCC ID: ST2-IT7210 FCC Certification Confidentiality Request Gentlemen: This letter is to comply with 47 CFR 0.457 and 0.459 pertaining to confidentiality material. Centrak, Inc. requests that the following documents regarding this submission for FCC ID: ST2-IT7210 be kept confidential: Exhibit Type Block Diagram Schematics Operational Description And below exhibit kept short-term confidential File Name Block Diagram.pdf Schematics.pdf Operational Description.pdf (180 days): External photos External photos.pdf Test setup photos test photo.pdf Internal photos Internal photos.pdf User manual User manual.pdf Those documents contain detailed system and equipment description and related information about the product which Centrak, Inc. considers to be confidential proprietary, a custom design and, otherwise, not releasable to the general public. Since this design is a basis form which future technological products will evolve, Centrak, Inc. considers this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give competitors an unfair advantage in the market. Yours Sincerely, Sherre Staves

Lable Thebackoftheprototype

Report No.: BL-SZ25A1189-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 11 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China TEST REPORT Applicant: CenTrak Inc Address: 826 Newtown-Yardley Rd, Newtown, Pennsylvania 18940, United States Equipment Type: Safety 2.0 Bracelet Model Name: IT-7210E H (refer to section 2.3) Brand Name: CenTrak FCC ID: ST2-IT7210 Test Standard: 47 CFR Part 2.1091 KDB 447498 D04 v01 Sample Arrival Date: Oct. 28, 2025 Test Date: Nov. 04, 2025 - Nov. 26, 2025 Date of Issue: Jan. 15, 2026 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Xiong Lining Checked by: Xu Rui Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ25A1189-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 11 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Revision History Version Issue Date Revisions Content Rev. 01 Jan. 15, 2026 Initial Issue TABLE OF CONTENTS 1 GENERAL INFORMATION ........................................................................................................ 3 1.1 Test Laboratory ............................................................................................................ 3 1.2 Test Location ................................................................................................................ 3 2 PRODUCT INFORMATION ....................................................................................................... 4 2.1 Applicant Information .................................................................................................... 4 2.2 Manufacturer Information .............................................................................................. 4 2.3 General Description for Equipment under Test (EUT) ................................................... 5 2.4 Technical Information ................................................................................................... 6 3 SUMMARY OF TEST RESULT ................................................................................................. 7 3.1 Test Standards ............................................................................................................. 7 3.2 Limit Standards ............................................................................................................. 7 4 DEVICE CATEGORY AND LEVELS LIMITS ............................................................................. 8 5 ASSESSMENT RESULT ......................................................................................................... 10 5.1 Output Power ............................................................................................................. 10 5.2 Tune-up power ........................................................................................................... 10 5.3 RF Exposure Evaluation Result .................................................................................. 10 5.4 Conclusion .................................................................................................................. 10 Report No.: BL-SZ25A1189-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 11 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1 GENERAL INFORMATION 1.1 Test Laboratory Name Shenzhen BALUN Technology Co., Ltd. Address Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Phone Number +86 755 6685 0100 1.2 Test Location Name Shenzhen BALUN Technology Co., Ltd. Location Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1/F, Building B, Ganghongji High-tech Intelligent Industrial Park, No. 1008, Songbai Road, Yangguang Community, Xili Sub-district, Nanshan District, Shenzhen, Guangdong Province, P. R. China Accreditation Certificate The laboratory is a testing organization accredited by FCC as a accredited testing laboratory. The designation number is CN1196. Report No.: BL-SZ25A1189-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 4 / 11 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 2 PRODUCT INFORMATION 2.1 Applicant Information Applicant CenTrak Inc Address 826 Newtown-Yardley Rd, Newtown, Pennsylvania 18940, United States 2.2 Manufacturer Information Manufacturer CenTrak Inc Address 826 Newtown-Yardley Rd, Newtown, Pennsylvania 18940, United States Report No.: BL-SZ25A1189-701 Tel: +86-755-66850100 E-mail: [email protected] Page No. 5 / 11 Web: www.titcgroup.com Template No.: TRP-FCC-Mobile (2023-10-07) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 2.3 General Description for Equipment under Test (EUT) EUT Name Safety 2.0 Bracelet Model Name Under Test IT-7210E H Series Model Name IT-7210E, ITK-7210E R, ITK-7210E S, ITK-7210E H R, ITK-7210E H S, CTK-BRACR765, CTK-BRACS765, CTH-BRAC765 Description of Model name differentiation The tested models are using same PCBA and Firmware, only different on top housing(Solid face, Button face, Watch face) and band type (Rugged band, Secure band); The CenTrak Safety 2.0 Bracelet variants are identical in internal hardware and RF design. Differences between model numbers are limited to firmware configuration, assembly options (band type), optional accessories, and labeling an…

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Report No.: BL-SZ25A1189-602 Tel: +86-755-66850100 E-mail: [email protected] Page No. 1 / 34 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.249 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China TEST REPORT Applicant: CenTrak Inc Address: 826 Newtown-Yardley Rd, Newtown, Pennsylvania 18940, United States Equipment Type: Safety 2.0 Bracelet Model Name: IT-7210E H (refer to section 2.3) Brand Name: CenTrak FCC ID: ST2-IT7210 Test Standard: 47 CFR Part 15 Subpart C (refer to section 3.1) Sample Arrival Date: Oct. 28, 2025 Test Date: Nov. 04, 2025 - Nov. 26, 2025 Date of Issue: Jan. 15, 2026 ISSUED BY: Shenzhen BALUN Technology Co., Ltd. Tested by: Yang Wenxuan Checked by: Ye Hongji Approved by: Tolan Tu (Testing Director) _______________ _______________ _______________ Report No.: BL-SZ25A1189-602 Tel: +86-755-66850100 E-mail: [email protected] Page No. 2 / 34 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.249 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Revision History Version Issue Date Revisions Rev. 01 Jan. 15, 2026 Initial Issue TABLE OF CONTENTS 1 GENERAL INFORMATION ........................................................................................................ 4 1.1 Test Laboratory ............................................................................................................ 4 1.2 Test Location ................................................................................................................ 4 2 PRODUCT INFORMATION ....................................................................................................... 5 2.1 Applicant Information .................................................................................................... 5 2.2 Manufacturer Information .............................................................................................. 5 2.3 General Description for Equipment under Test (EUT) ................................................... 6 2.4 Technical Information ................................................................................................... 7 3 SUMMARY OF TEST RESULTS ............................................................................................... 8 3.1 Test Standards ............................................................................................................. 8 3.2 Test Verdict .................................................................................................................. 8 4 GENERAL TEST CONFIGURATIONS ...................................................................................... 9 4.1 Test Environments ........................................................................................................ 9 4.2 Test Equipment List ...................................................................................................... 9 4.3 Measurement Uncertainty ........................................................................................... 10 4.4 Description of Test Setup ........................................................................................... 10 5 TEST ITEMS ........................................................................................................................... 14 5.1 Antenna Requirements ............................................................................................... 14 5.2 20 dB and 99% Bandwidth.......................................................................................... 15 5.3 AC Conducted Emission ............................................................................................. 16 5.4 Radiated Spurious Emission ....................................................................................... 17 5.5 Band Edge (Restricted-band band-edge) .................................................................... 19 ANNEX A TEST RESULT ........................................................................................................... 20 A.1 20 dB and 99% Bandwidth.......................................................................................... 20 Report No.: BL-SZ25A1189-602 Tel: +86-755-66850100 E-mail: [email protected] Page No. 3 / 34 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.249 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China A.2 AC Conducted Emissions ........................................................................................... 22 A.3 Radiated Emission ...................................................................................................... 23 A.4 Band Edge (Restricted-band band-edge) .................................................................... 31 ANNEX B TEST SETUP PHOTOS ............................................................................................. 33 ANNEX C EUT EXTERNAL PHOTOS ......................................................................................... 33 ANNEX D EUT INTERNAL PHOTOS .......................................................................................... 33 Report No.: BL-SZ25A1189-602 Tel: +86-755-66850100 E-mail: [email protected] Page No. 4 / 34 Web: www.titcgroup.com Template No.: TRP-FCC Part 15.249 (2022-01-12) Add: Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China 1 GENERAL INFORMATION 1.1 Test Laboratory Name Shenzhen BALUN Technology Co., Ltd. Address Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, Shenzhen, Guangdong Province, P. R. China Phone Number +86 755 6685 0100 1.2 Test Location Name Shenzhen BALUN Technology Co., Ltd. Location Block B, 1/F, Baisha Science and Technology Park, Shahe Xi Road, Nanshan District, She…

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868 and 915MHz dual (wideband) ISM band SMD chip antennaP/N 0900AT43A0070 Detail Specification: Page 1 of 11 *Efficiency based on evaluation board 0900AT43A0070-EB2SMA, Layout# 2, page 6 L ±± W ±± T a ±± https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 2.0 2021 Johanson Technology, Inc. All Rights Reserved Peak Gain (dBi) -0.5 typ. (XZ-Total) Average Gain (dBi) -2.5 typ. (XZ-Total) Layout Recommendation #1 - 0900AT43A0070-EB1SMA, see page 2 Suffix = S Part Number Explanation Packing Style Terminal Configuration Function RF Feeding Point To trace element No. 1 2 Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. Frequency (MHz) 858 - 928 Reel Quantity (pcs/reel) 1,000 Operating Temperature -40 to +85°C Impedance ( Ω) Input Power (W) Recommended Storage Conditions and Period for unused T&R Product +5 to +35°C Humidity 45 - 75% RH 50 2 max. (CW) 18 months max. Return Loss (dB) 4 min. High Frequency Ceramic Solutions Part Number 1/29/2021 Let us help you with the antenna design, optimization, and tuning! 0900AT43A0070 General Specifications https://www.johansontechnology.com/ask-a-question 100% Tin e.g. 0900AT43A0070S e.g. 0900AT43A0070E e.g. 0900AT43A0070(E or S) Mechanical Dimensions Suffix = E Suffix = None T & R Bulk (loose pcs) 0.012 Radiated Efficiency* 48% ave. Layout Recommendation #2 - 0900AT43A0070-EB2SMA, see page 6 Evaluation Board P/N Suffix 0.008 0.008 0.276 0.079 In 7.00 2.00 +.004 / -.0080.031 0.020 0.20 0.20 +0.10 / -0.20 0.30 mm 0.80 0.50 Top View Side View
 a T L W Top Bottom 868 and 915MHz dual (wideband) ISM band SMD chip antennaP/N 0900AT43A0070 Detail Specification: Page 2 of 11 https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 2.0 2021 Johanson Technology, Inc. All Rights Reserved • Need help laying out the antenna, want us to review your antenna design (free!), require the Gerber files for this EVB, or would like us to validate the new tuning values of your PCB (fee may apply) go to: https://www.johansontechnology.com/ask-a- question Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. High Frequency Ceramic Solutions 1/29/2021 Layout Recommendation #1: Evaluation Board p/n: 0900AT43A0070-EB1SMA • Orderable EVB for evaluation, it comes with a female SMA connector. Go to: https://www.johansontechnology.com/request- a-sample and ask for p/n 0900AT43A0070-EB1SMA • The total antenna area usage for this EVB is approx. 25x10mm (due to trace element), but the trace can be re- shaped to reduce effective area and conform to the designer's PCB. • Attention: Matching circuits and component values will be different on the client's design, depending on PCB layout, geometry, etc. It is recommended that the designer leave available slots for a "pi" (or shunt-series-shunt) network. The antenna matching network values you see here are used when antenna is mounted on Johanson's evaluation board. 35mm 10mm No GND 19mm (can be any length) 50Ω CPWG Feed Line 30mm GND Plane GND GND 1.8 6 8.4 1.5 22.5 6.5 0.5 0 Ohm 2.2 pF 0.5 0.5 * *Line width should be designed to match 50ohm characteristic impedance, depending on your PCB material and thickness(distance to GND) All units in: mm 1.01.4 868 and 915MHz dual (wideband) ISM band SMD chip antennaP/N 0900AT43A0070 Detail Specification: Page 3 of 11 https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 2.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions 1/29/2021 Typical Electrical Performance (T=25°C) on Layout Recommendation #1 Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. Return Loss (with matching) 0.70.91.11.30.51.5 -25 -20 -15 -10 -5 -30 0 freq, GHz dB(S(1,1)) m15 m25 m18 m15 freq= dB(S(1,1))=-6.031 858.0MHz m25 freq= dB(S(1,1))=-22.032 893.0MHz m18 freq= dB(S(1,1))=-7.694 928.0MHz This antenna has about 20MHz of guard-band on each side. 868 and 915MHz dual (wideband) ISM band SMD chip antennaP/N 0900AT43A0070 Detail Specification: Page 4 of 11 https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 2.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions 1/29/2021 Typical Radiation Patterns (T=25°C) of Layout Recommendation #1 Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. Y :Φ(Phi)=90 o X :Φ(Phi)=0 o Z :θ(Theta)=0 o XY-plane @868MHz Total XZ-Plane @868MHz Total YZ-Plane @868MHz Total 868 and 915MHz dual (wideband) ISM band SMD chip antennaP/N 0900AT43A0070 Detail Specification: Page 5 of 11 https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 2.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions 1/29/2021 Typical Radiation Patterns (T=25°C) of Layout Recommendation #1 Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. Y :Φ(Phi)=90 o X :Φ(Phi)=0 o Z :θ(Theta)=0 o XY-plane @915MHz Total XZ-Plane @915MHz Total YZ-Plane @915MHz Total 868 and 915MHz dual (wideband) ISM band SMD chip antennaP/N 0900AT43A0070 Detail Specification: Page 6 of 11 https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 2.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions 1/29/2021 Layout Recommendation #2: Evaluation Board p/n: 090…

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