2AMNT-KS500KeySmart SmartCard

KeySmart SmartCard KS500-BLK KS500-SMK KS500 KS500-WHT KS500-CLR Curv Group,LLC 860 Bonnie Ln,Elk Grove Village,IL60007,USA KeySmartKeySmartkeysmart KeySmart SmartCard KS500-BLK KS500-SMK KS500

1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: Curv Group LLC FRN: 0026640565 Contact Name: Michael Mike Address: 860 Bonnie Ln, Elk Grove Village, IL 60007, USA Telephone No: (+01)8476360101 Email: [email protected] Applicant: Company name: Curv Group LLC FRN: 0026640565 Product Description: KeySmart SmartCard Grantee code: 2AMNT FCC ID: 2AMNT-KS500 Contact Name: Michael Mike Address: 860 Bonnie Ln, Elk Grove Village, IL 60007, USA Telephone No: (+01)8476360101 Email: [email protected] [Curv Group LLC] certifies that, as of the date of this filing of the application with the TCB, [Curv Group LLC] is our designated US agent for service of process for the above referenced FCC ID. [Curv Group LLC] accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any commission related proceeding involving equipment. [Curv Group LLC] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 12.22.2023 Applicant’s Name: Michael Mike US Agent’s Name: Michael Mike Title: Title: Signature Signature

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: Curv Group LLC FRN: 0026640565 Grantee code: 2AMNT FCC ID: 2AMNT-KS500 Contact Name: Michael Mike Address: 860 Bonnie Ln, Elk Grove Village, IL 60007, USA Telephone No: (+01)8476360101 Fax No: (+01)8476360101 Email: [email protected] i. [Curv Group LLC] (“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. [ Curv Group LLC] (“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. Curv Group LLC. 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: 12.22.2023 Applicant’s Name: Michael Mike Title: 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

Curv Group LLC Product Similarity Declaration Product name: KeySmart SmartCard Model name: KS500-SMK, KS500-WHT, KS500-CLR, KS500, KS500-BLK FCC ID: 2AMNT-KS500 We (Curv Group LLC) 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: Michael Mike Title: Date: 12.22.2023

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Curv Group LLC Address: 860 Bonnie Ln, Elk Grove Village, IL 60007, USA Product Name: KeySmart SmartCard Model Number: KS500-SMK, KS500-WHT, KS500-CLR, KS500, KS500-BLK FCC Identifier: 2AMNT-KS500 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: Michael Mike Date: 12/22/2023 Title: Signature of applicant:

Page 1 of 3 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 - EUT Photos Model: KS500-SMK Page 2 of 3 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] Page 3 of 3 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] ----End of Report----

Page 1 of 3 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 - EUT Photos Model: KS500-SMK 2.4G ANT Coil ANT RX Page 2 of 3 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] Page 3 of 3 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] ----End of Report----

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.: MTi231109007-04E2 Date of issue: 2023-12 -20 Applicant: Curv Group, LLC Product: KeySmart SmartCard Model(s): KS500-SMK, KS500-WHT, KS500-CLR, KS500, KS500-BLK FCC ID: 2AMNT-KS500 Shenzhen Microtest Co., Ltd. http://www.mtitest.com - Page 2 of 6- Report No.: MTi231109007-04E2 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.: MTi231109007-04E2 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: Curv Group, LLC Address: 860 Bonnie Ln, Elk Grove Village, IL 60007, USA Manufacturer: Shenzhen Xinzhensheng Electronics CO., LTD Address: Room 401, Building 15.Fuyong ECOOL, Fuyong street, Bao'an District, Shenzhen, Guangdong Product description Product name: KeySmart SmartCard Trademark: KeySmart Model name: KS500-SMK Serial Model: KS500-WHT, KS500-CLR, KS500, KS500-BLK Standards: N/A Test method: KDB 447498 D01 v06 Date of Test Date of test: 2023-12 -18 ~ 2023-12 -20 Test result: Pass Test Engineer : (Letter Lan) Reviewed By: : (Leon Chen) Approved By: : (Tom Xue) - Page 4 of 6- Report No.: MTi231109007-04E2 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.: MTi231109007-04E2 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 for 50 mm in step a)] + [(test separation distance – 50 mm)·10]} mW, for > 15…

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1 Antenna specification 1、Antenna introduction The Bluetooth module antenna is directly used on the PCB. Manufacturer：Lenze Design Inc Address: 7th Floor, Ching Po Building, Shenzhen Special Zone Press Group, Futian District, Shenzhen 2、Antenna shape 2 3、Antenna parameter The Bluetooth antenna operates at 2402-2480 MHz and generates resonance in this band. The table below shows the main parameters of the antenna. Frequency(MHz) 2402 ~ 2480 MHz VSWR ≤ 1.95 Impedance 50 Ohm Nominal Return Loss -15 dB Max Radiation Omni -directional Gain (Peak) 1.08dBi Polarization Linear, Vertical Admitted Power 1MW Connector Tin 3 4、Antenna gain report Spectrum Detector: PK Test Date : Feb 18, 2019 Test By: Mark Temperature : 25°C Test Result: PA S S Humidity : 52 % Modulation: GFSK Frequency VNA (MHz) E Total. dB(dB) 2400MHz 0.0403503 2410MHz 0.0886264 2420MHz 0.267381 2430MHz 0.193012 2440MHz 0.26366 2450MHz 0.0723139 2460MHz 0.36895 2470MHz 0.551525 2480MHz 0.640702 2490MHz 1.05232 2500MHz 1.08443 4 Direction map ： PHI 0° 5 PHI 90° 6 THETA 90°

Address: 101, No.7, Zone 2, Xinxing Industrial Park, Fuhai Avenue, Xinhe Community, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China Tel : (8 6-755)88850135 Fax: (86-755) 88850136 We b : www.mtitest.com E-mail: [email protected] Test Report Report No.: MTi231109007-04E1 Date of issue: 2023-12-20 Applicant: Curv Group, LLC Product: KeySmart SmartCard Model(s): KS500-SMK, KS500-WHT, KS500-CLR, KS500, KS500-BLK FCC ID: 2AMNT-KS500 Shenzhen Microtest Co., Ltd. http://www.mtitest.com Page 2 of 51 Report No.: MTi231109007-04E1 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] 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 51 Report No.: MTi231109007-04E1 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] Table of contents 1 General Description ........................................................................................................................ 5 1.1 Description of EUT ............................................................................................................................................. 5 1.2 Description of test modes ................................................................................................................................... 5 1.3 Environmental conditions for testing .................................................................................................................. 7 1.4 Description of support units ................................................................................................................................ 7 2 Measurement uncertainty ............................................................................................................... 8 3 Summary of Test Result .................................................................................................................. 9 4 Test Laboratory ............................................................................................................................. 10 5 Equipment List .............................................................................................................................. 11 6 Test Result ..................................................................................................................................... 12 6.1 Antenna requirement ........................................................................................................................................ 12 6.2 AC power line conducted emissions................................................................................................................. 13 6.3 Radiated spurious emission ............................................................................................................................. 14 6.4 DTS bandwidth ................................................................................................................................................. 23 6.5 Maximum conducted output power .................................................................................................................. 24 6.6 Power spectral density ..................................................................................................................................... 25 6.7 Band edge (Conducted) ................................................................................................................................... 26 6.8 Conducted spurious emissions ........................................................................................................................ 27 6.9 Duty Cycle ........................................................................................................................................................ 28 Appendix A: DTS Bandwidth ............................................................................................................... 29 Appendix B: Maximum conducted output power ............................................................................... 32 Appendix C: Maximum power spectral density .................................................................................. 35 Appendix D: Band edge measurements ............................................................................................. 38 Appendix E: Conducted Spurious Emission ...................................................................................... 40 Appendix F: Duty Cycle ....................................................................................................................... 47 Photographs of the Test Setup ............................................................................................................ 50 Photographs of the EUT....................................................................................................................... 51 Page 4 of 51 Report No.: MTi231109007-04E1 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] Applicant: Curv Group, LLC Address: 860 Bonnie Ln, Elk Grove Village, IL 60007, US…

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Page 1 of 1 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: KS500-SMK Radiated emissions –Below 1 GHz Radiated emissions –Above 1 GHz ----End of Report----