ZE8-SMK-HXV-20FLIP KEY TAG

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KYUNGWOO SYSTECH INC. #401, Daeryung Post Tower 5, 68, Digital-ro 9, Geumcheon-gu, Seoul, South Korea TEL: +82-2-985-8085, FAX: +82-2-985-8087 http://kyungwoo.com/ December 30, 2020 Federal Communications Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD21046 RE: LETTER OF AGENT AUTHORIZATION We, the undersigned, hereby authorize SK TECH Co., Ltd.(Mr. Jongsoo, Yoon) to act on our behalf in all matters relating to application for equipment authorization. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). APPLICANT/AGENT CERTIFICATION AND AGREEMENT: All of the statements herein and the exhibits attached hereto, are true and correct to the best of my knowledge and belief. In accepting a Grant of Equipment Authorization issued by the TCB, under the authority of the FCC, as a result of the representations made in this application, the applicant is responsible for (1) labeling the equipment with the exact FCC ID specified in this application, (2) compliance statement labeling pursuant to the applicable rules, and (3) compliance of the equipment with the applicable technical rules. If the applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCC’s technical requirements. Authorizing an agent to sign this application, is done solely at the applicant’s discretion; however, the applicant remains responsible for all statements in this application. Sincerely, Woo, Kyung-il / Research Director

KYUNGWOO SYSTECH INC. #401, Daeryung Post Tower 5, 68, Digital-ro 9, Geumcheon-gu, Seoul, South Korea TEL: +82-2-985-8085, FAX: +82-2-985-8087 http://kyungwoo.com/ December 30, 2020 Federal Communications Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD21046 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, KYUNGWOO SYSTECH INC. requests confidentiality for the following products: FCC ID Description (Model) ZE8-SMK-HXV-20 FLIP KEY TAG (SMK-HXV-20) The requested Permanent and Short-Term Confidential exhibits art listed as follows: PERMANENT AND SHORT-TERM CONFIDENTIAL LIST Exhibit Description PERMANENT 1 Block Diagram 2 Operational Description 3 Schematics No other items submitted as part of the equipment authorization filing process are deemed confidential. The above exhibits contain KYUNGWOO SYSTECH INC. trade secrets and proprietary information that could be of benefit to our competitors regarding the design of our products. This material is not customarily available to the general public and we request that it be withheld from public inspection. Sincerely, Woo, Kyung-il / Research Director

DATA SHEET WIRELESS COMPONENTS FR4 Chip Antenna ANT1204F002R0433A 433MHZ 1204 Series Product S pecification – August 18, 2014 V.0 www.ya geo.co m Aug. 18, 2014 V0 WIRELESS COMPONENTS 2 2 Product specification Ceramic Chip Antenna FEATURES  Compact size  Omni-directional Radiation  Tape & reel automaic mounting  Reflow process compatible  RoHS compliant APPLICATIONS  Smart meter  Industrial remote control  ISM band equipment ORDERING INFORMATION All part numbers are identified by the series, packing type, material, size, antenna type, working frequency and packing quantity. PART NUMBER ANT 1204 F 002 R 0433A (1) (2) (3) (4) (5) (6) ( 1 ) PRODUCT ANT = Antenna ( 2 ) SIZE 1204=12× 4 ( 3 ) ANTENNA TYPE L, F, A=Chip antenna ( 4 ) SERIAL NO. 002 ( 5 ) PACKING STYLE R = Tape and Reel ( 6 ) WORKING FREQUENCY 0433=433 MHz PHYCOMP CTC CAN4311059020431K 12NC 431105902043 www.ya geo.co m Aug. 18, 2014 V0 WIRELESS COMPONENTS 3 3 Product specification Ceramic Chip Antenna SPECIFICATION DESCRIPTION VALUE Centre Frequency 433 M Hz Bandwidth 28M Hz ( Typ. ) Return Loss 6.5 dB min Polarization Linear Azimuth Beamwidth Omni-directional Peak Gain 0.79 dBi ( Typ. ) Impedance 50 Ω Operating Temperature - 40~105 °C Maximum Power 1 W Termination Cu / Au (Environmentally-Friendly Leadless) Resistance to Soldering Heats 260°C , 10sec. NOTE 1. The specification is defined on Yageo evaluation board Table 1 O O U U T T L L I I N N E E S S Fig. 1 Antenna outlines DIMENSIONS DIMENSION L (mm) 12.30 ± 0.20 W (mm) 4.00 ± 0.20 T (mm) 1.60 ± 0.20 A (mm) 0.50 ±0.20 Table 2 Machinical Dimension TERMINAL NAME FUNCTION S1 Feeding Point S2 Soldering Point Table 3 Termination configuration www.ya geo.co m Aug. 18, 2014 V0 WIRELESS COMPONENTS 4 4 Product specification Ceramic Chip Antenna Fig. 3 Outlook and dimension of evaluation board REFERENCE DESIGN OF EVALUATION BOARD Fig. 4 Details of soldering Pad www.ya geo.co m Aug. 18, 2014 V0 WIRELESS COMPONENTS 5 5 Product specification Ceramic Chip Antenna Fig. 5 Return loss Fig. 6 Radiation pattern Frequency= 433 MHz Max gain = 0.79 dBi, at (150,330) MEG (mean effective gain)= -4.84 dBi Directivity (dB) = 6.35 Efficiency = -5.56dB, 27.79 % ELECTRICAL PERFORMANCES Evaluation board and XYZ direction Marker data 1. 419MHz, -6.5dB 2. 433MHz, -16dB 3. 447MHz, -6.5dB www.ya geo.co m Aug. 18, 2014 V0 WIRELESS COMPONENTS 6 6 Product specification Ceramic Chip Antenna REVISION HISTORY REVISION DATE CHANGE NOTIFICATION DESCRIPTION Version 0 Aug. 05, 2013 - - New data sheet for SMD type antenna, 433MHz application, 1204 series

SK Tech Co., Ltd. Page 1 of 3 Photographs of EUT External view - Front External view - Rear SK Tech Co., Ltd. Page 2 of 3 External view –Left External view – Right SK Tech Co., Ltd. Page 3 of 3 External view - Top External view - bottom

ID Label Location & Sample LABEL LOCATION: LABEL will be attached to the REAR of the product LABEL Drawing:

SK Tech Co., Ltd. Page 1 of 2 Photographs of EUT Cover opened SK Tech Co., Ltd. Page 2 of 2 Main board - Front Main board - Rear 125 kHz LF ANT(Receiver only) 433.96 MHz Chip ANT(TX/RX) 125 kHz LF ANT(Receiver only)

SK Tech Co., Ltd. Test Report Number: SKT-RFC-200006 Page 2 of 22 SGF-R-708-02 Rev 0.0 Revision History of Test Report Rev. Revisions Effect page Approved by Date - Initial issue All Jongsoo Yoon Dec. 31, 2020 SK Tech Co., Ltd. Test Report Number: SKT-RFC-200006 Page 3 of 22 SGF-R-708-02 Rev 0.0 TABLE OF CONTENTS 1 Summary of test results ................................................................................................. 4 2 Description of equipment under test (EUT) .................................................................. 5 3 Test and measurement conditions ................................................................................ 6 3.1. Test configuration (arrangement of EUT) ................................................................................ 6 3.2. Description of support units (accessory equipment) ................................................................ 6 3.3. Interconnection and I/O cables ................................................................................................ 6 3.4. Measurement Uncertainty (U) ................................................................................................. 6 3.5. Test date .................................................................................................................................. 6 4 Facilities and accreditations .......................................................................................... 7 4.1. Facilities ................................................................................................................................... 7 4.2. Accreditations .......................................................................................................................... 7 4.3. List of test and measurement instruments ............................................................................... 7 5 Test and measurements ................................................................................................. 8 5.1. Antenna requirement ............................................................................................................... 8 5.2. 20 dB Emission Bandwidth ...................................................................................................... 9 5.3. Transmission Time ................................................................................................................. 11 5.4. Radiated emissions ............................................................................................................... 14 SK Tech Co., Ltd. Test Report Number: SKT-RFC-200006 Page 4 of 22 SGF-R-708-02 Rev 0.0 1 Summary of test results Requirement CFR 47 Section Result Antenna Requirement 15.203 Meets the requirements 20dB Emission Bandwidth 15.231(c) Meets the requirements Transmission Time 15.231(a) Meets the requirements Spurious Emission, Band Edge, and Restricted bands 15.231(b), 15.205(a), 15.209(a) Meets the requirements AC power line Conducted emissions 15.207(a) N/A Note: The EUT uses a lithium battery with DC 3 V, and therefore the test suites related to AC Mains port were not applicable. SK Tech Co., Ltd. Test Report Number: SKT-RFC-200006 Page 5 of 22 SGF-R-708-02 Rev 0.0 2 Description of equipment under test (EUT) Product: FLIP KEY TAG Model: SMK-HXV-20 Serial number: None (prototype) Model differences: Model name Difference Tested (checked) SMK-HXV-20 fully tested model that was provided by the applicant Technical data: Power source DC 3.0 V lithium battery (type CR2032) Local Oscillator or X-Tal 32.768 kHz, 26 MHz Operating Frequency 433.96 MHz 125 kHz (receive only) Antenna Type Integral chip antenna Resonance coil (2 EA) Type of Modulation GFSK ASK RF Output power 85.5 dBμV/m (PEAK) (measured @ 3m) - I/O port Type Q'ty Remark - - - Modification of EUT during the compliance testing: Two test samples were provided for testing. SAMPLE #1 was firmware modified to transmit RF signal continuously. SK Tech Co., Ltd. Test Report Number: SKT-RFC-200006 Page 6 of 22 SGF-R-708-02 Rev 0.0 3 Test and measurement conditions 3.1. Test configuration (arrangement of EUT) The EUT was tested as a stand-alone equipment. The EUT was powered from the new battery during the radiated emission measurements. In order to transmit RF signals, the LOCK button on the EUT (SAMPLE #1) was pressed once. The measurements were taken when the EUT (SAMPLE #1) transmitted the RF signals. NOTE: the Transmission Time was measured in the normal operation for the EUT (SAMPLE #2; without the firmware modification). The RF signals manually transmitted when releasing the button of the EUT or automatically transmitted when being activated during pairing with SMK READER in order for the EUT to be registered to SMK READER or verify the ID code. 3.2. Description of support units (accessory equipment) The following support units or accessories were used to form a representative test configuration during the tests. # Equipment Manufacturer Model No. Serial No. 1 SMK READER KYUNGWOO SYSTECH INC . SMK-HXV-10 N/A 3.3. Interconnection and I/O cables The following support units or accessories were used to form a representative test configuration during the tests. Start End Cable # Name I/O port Name I/O port length (m) shielded (Y/N) - - - - - - 3.4. Measurement Uncertainty (U) Measurement Item Combined Standard Uncertainty Uc Expanded Uncertainty U = k  Uc (k = 2) Conducted emissions 1.4 ± dB 2.8 ± dB Radiated emissions (9 kHz to 30 MHz) 1.45 ± dB 2.9 ± dB Radiated emissions (30 MHz to 1000 MHz) 2.5 ± dB 5.0 ± dB Radiated emissions (1 GHz to 6 GHz) 2.5 ± dB 5.0 ± dB 3.5. Test date Date Tested December 16, 2020 – December 23, 2020 SK Tech Co., Ltd. Test Report Number: SKT-RFC-200006 Page 7 of 22 SGF-R-708-02 Rev 0.0 4 Facilities and accreditations 4.1. Facilities All of the measurements described in this report were performed at SK Tech Co., Ltd Site I: 88, Geulgaeul-ro 81beon-gil, Wabu-eup, Namyangju-si, Gyeonggi-do, Korea Site II:…

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SK Tech Co., Ltd. Test Report Number: SKT-RFC-200006 Page 1 of 2 SGF-R-708-02 Rev 0.0 Photographs of the test set-up Radiated emission test (9 kHz to 30 MHz) Radiated emission test (30 MHz to 1 GHz) SK Tech Co., Ltd. Test Report Number: SKT-RFC-200006 Page 2 of 2 SGF-R-708-02 Rev 0.0 Radiated emission test (1 GHz to 5 GHz) 20 dB Emission Bandwidth