2A9SA-LF23-HLDigital Locker Lock

1 234 5 6 2 3 1 4 6 7 OWNER (Top level Management RFID Card) 13.56 MHz RFID Card, 1 pc First used card registered as Owner Register or delete Master & Cleaner Setting all functions Does not have lock or unlock function Please keep in safe place for security MASTER (Mid-level Management RFID Card or Password) Up to five 13.56 MHz RFID card, One 4-12 digit code Register or delete User Unlock the lock if loose user card/code, but cannot lock there will be warning alarm and the user card/code deleted right after using the master Please keep in safe place for security. Re-rigister all masters if loose any one of the master card/code USER (User RFID Card or Password) CLEANER (Cleaning Purpose RFID Card) Up to five 13.56 MHz RFID card Lock or unlock the lock Re-register all cleaner cards if lost any one of the cleaner card. Up to five 13.56 MHz RFID card, One 4-12 digit code Lock or unlock the lock Re-register all users if loose any one of user card/code Lock will be freezed 30 seconds after 5 times wrong entry. Need to register “Owner” after reset. Suggest to use OK Digital’s “Owner” printed card. Use same procedure for changing the master card. All previous master cards will be deleted when registered even one master card. Default master code is “5351” when set the master code “use”. Be sure to change it for security. Use a master card/code to unlock it when lost the user card/code. Master card/code has unlock function only, cannot lock. If the locker in use is unlocked, it means the master card/code has been used. Factory default user code is “1111” at private mode. Lock is remain unlocked after use at public mode. User code will be deleted after unlock it. It will be locked again and the user code is not deleted after 5 seconds if not open the door. There is no public mode for user card. Only user code supports public mode. Self locking mode prevents the mistake of locking by left the user card inside. “And mode” provides stronger security, register both of user card and user code, and use both of it to unlock. The order of using card and number is doesn’t matter for registration and using. Public mode will be changed to private mode when use “And mode”. Cleaner card can open the locker anytime even if it is being used and there is no traces. Keep in safe place and pay special attention to use and management. Use same procedure for changing the cleaner card. All previous cleaner cards will be deleted when registered even one cleaner card.

OK DIGITAL Co., Ltd. Mega Bldg 1510, SKn Technopark, 124, Sagimakgol-ro, Jungwon-gu,Gyeonggi-do, Republic of Korea Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 02-06-2023 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID:HL-LF23-2A9SA OK DIGITAL Co., Ltd.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. Sincerely, Inhyeon Baik / Division Director OK DIGITAL Co., Ltd.

OK DIGITAL Co., Ltd. Mega Bldg 1510, SKn Technopark, 124, Sagimakgol-ro, Jungwon-gu,Gyeonggi-do, Republic of Korea Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 02-06-2023 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID:HL-LF23-2A9SA OK DIGITAL Co., Ltd.certifies that the equipment for which authorization is soughtis not“covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, Inhyeon Baik / Division Director OK DIGITAL Co., Ltd.

OK DIGITAL Co., Ltd. Mega Bldg 1510, SKn Technopark, 124, Sagimakgol-ro, Jungwon-gu,Gyeonggi-do, Republic of Korea [LF23-HL] Letter of Authorization FO011_Authorization_for_Certification LETTER OF AUTHORIZATION OK DIGITAL Co., Ltd. Mega Bldg 1510, SKn Technopark, 124, Sagimakgol-ro, Jungwon-gu,Gyeonggi-do, Republic of Korea Date: 2022-12-29 To whom it may concern: We the undersigned, hereby authorizeNTREE Co., Ltd.to act as our authorized agent on our behalf in all manners relating to application for FCC equipment authorization, including signing of all documents relating to these matters. Any individual within this entity may act on our behalf. Any and all acts carried out byNTREE Co., Ltd.on our behalf shall have the same effect as acts of our own. This authorization is valid until further written notice fromOK DIGITAL Co., Ltd. Sincerely, Signature: NAME:Inhyeon Baik (Please print or type) TITLE:Division Director

OK DIGITAL Co., Ltd. Mega Bldg 1510, SKn Technopark, 124, Sagimakgol-ro, Jungwon-gu,Gyeonggi-do, Republic of Korea Date: Dec 29, 2022 Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: 2A9SA-LF23-HL Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: PERMANENT Exhibit TypeFile Name Part List[LF23-HL] Part List.pdf Schematics Diagram(s)[LF23-HL] Schematics.pdf Block diagram[LF23-HL] Block diagram.pdf Operation description[LF23-HL] Operation description.pdf And the above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Inhyeon Baik / Division Director OK DIGITAL Co., Ltd.

External photo Front Rear Top Bottom Left Right Front Rear

(LF23-HL) Front Label Location : Back side of the front unit Rear Label Location : Once you opened cover, it is displayed on back side of the rear unit.

Internal photo EUT Main Board Front Main Board Rear Power Board Front Power Board Rear Motor Antenna Location Antenna

NTREE Co., Ltd. (http://www.ntree.or.kr) 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA RF-FCC/IC-001 (ver.0)Report No.: N2302R-0061 Page 2 of 22 REPORT REVISION HISTORY DateRevisionPage No 2023-02-02Originally Issued- This report shall not be reproduced except in full, without the written approval of NTREE Co., Ltd. This document may be altered or revised by NTREE Co., Ltd. personnel only, and shall be noted in the revision section of the document. Any alteration of this document not carried out by NTREE Co., Ltd. will constitute fraud and shall nullify the document. NTREE Co., Ltd. (http://www.ntree.or.kr) 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA RF-FCC/IC-001 (ver.0)Report No.: N2302R-0061 Page 3 of 22 Contents 1.General Information4 1.1General Description of EUT4 1.2Channel list4 1.3Test condition4 1.4Test Summary5 1.5Test Perfomed6 1.6Test Instruments list7 1.7Measurement uncertainty7 2.Test Result8 2.1Spurious Emissions8 2.220㏈bandwidth19 2.3Frequency stability20 NTREE Co., Ltd. (http://www.ntree.or.kr) 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA RF-FCC/IC-001 (ver.0)Report No.: N2302R-0061 Page 4 of 22 1. General Information 1.1General Description of EUT Product Name:Digital Locker Lock Model No.:LF23-HL Variant Model No.:N/A Operation Frequency:13.56 MHz Channel numbers:NFC: 1 Channel Modulation technology:NFC: ASK Antenna Specification:PCB Pattern Antenna Power sourceDC 4.5 V ( AA type battery x3) 1.2Channel list Operation Frequency each of channel ChannelFrequency 113.560 MHz 1.3Test condition Normal voltage DC Power4.50 NTREE Co., Ltd. (http://www.ntree.or.kr) 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA RF-FCC/IC-001 (ver.0)Report No.: N2302R-0061 Page 5 of 22 1.4Test Summary Section in FCC Part 15 & 2 ParameterTest results 15.225(a)The field strength of fundamentalPass 15.225(b)(c) The field strength of spurious emission (In-band) Pass 15.225(d) 15.209 The field strength of spurious emission (Out-band) Pass 2.104920㏈bandwidthPass 15.225(e)Frequency stabilityPass NTREE Co., Ltd. (http://www.ntree.or.kr) 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA RF-FCC/IC-001 (ver.0)Report No.: N2302R-0061 Page 6 of 22 1.5Test Perfomed RRA Designation No.: KR0157 KOLAS Accreditation No. : KT511 LaboratoryNTREE Co., Ltd. 1st laboratory Address : 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA Telephone:+82-31-893-0999 Facsimile:+82-31-297-0444 2nd laboratory Address : 30, Pajangcheon-ro 44beon-gil, Jangan-gu, Suwon-si, Gyeonggi-do, 16204, KOREA Telephone:+82-31-893-1000 Facsimile:+82-31-893-0111 SITE MAP 1 st laboratory 2 nd laboratory 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, KOREA 30, Pajangcheon-ro 44beon-gil, Jangan-gu, Suwon-si, Gyeonggi do, 16204, KOREA NTREE Co., Ltd. (http://www.ntree.or.kr) 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA RF-FCC/IC-001 (ver.0)Report No.: N2302R-0061 Page 7 of 22 1.6Test Instruments list Item Test Equipment ManufacturerModel No.Serial No. Cal. Date Cal.Due date (mm-dd-yy) 1 Signal Analyzer ROHDE & SCHWARZ FSV4010099403-10-2203-10-23 2DC Power SupplyAGILENT6632BMY4300401709-08-2209-08-23 3Signal Generator ROHDE & SCHWARZ SMB100A17756803-10-2203-10-23 4LOOP ANTENNASchwarzbeckFMZB15191519-04605-18-2205-18-24 5Tri-Log AntennaSchwarzbeckVULB 91689168-72103-21-2203-21-24 6Tri-Log AntennaSchwarzbeckVULB 91689168-57810-13-2210-13-24 7EMI Test Receiver ROHDE & SCHWARZ ESR710130203-10-2203-10-23 8AmplifierTESTEKTK-PA01S200103-L11-02-2211-02-23 1.7Measurement uncertainty For the test methods, according to the present document, the measurement uncertainty figures shall be calculated in accordance with TR100028-1 [2] and shall correspond to an expansion factor (coverage factor)k=1.96 ork= 2 (which provide confidence levels of respectively 95% and 95.5% in the case where the distributions characterizing the actual measurement uncertainties are normal. ParameterUncertainty Transmitter output power (Conducted) ±1.3 dB Radiated spurious emission (Below 1 GHz) ±4.8 dB Radiated spurious emission (Above 1 GHz) ±5.0 dB NTREE Co., Ltd. (http://www.ntree.or.kr) 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA RF-FCC/IC-001 (ver.0)Report No.: N2302R-0061 Page 8 of 22 2.Test Result 2.1Spurious Emissions Test setup The diagram below shows the test setup that is utilized to make the measurements for emission from 9 ㎑to 30㎒Emissions. The diagram below shows the test setup that is utilized to make the measurements for emission from 30㎒to 1㎓emissions. NTREE Co., Ltd. (http://www.ntree.or.kr) 228-60, Saneop-ro 155beon-gil, Gwonseon-gu, Suwon-si, Gyeionggi-do, 16648, KOREA RF-FCC/IC-001 (ver.0)Report No.: N2302R-0061 Page 9 of 22 Test procedure [9㎑to 30㎒] The EUT was placed on the top of a rotating table 0.8 meter above the ground at a 3 meter anechoic chamber. The table was rotated 360 degrees to determine the position of the highest radiation. Then antenna is a loop antenna is fixed at one meter above the ground to determine the maximum value of the field strength. Both parallel and perpendicular of the antenna are set to make the measurement. For each suspected emission, the EUT was arranged to its worst case and then the table was turned from 0 degrees to 360 degrees to find the maximum reading. The test-receiver system was set to Quasi- peak function and specified bandwidth with maximum hold mode. The spectrum analyzer is set to: 1. The resolution bandwidth and video bandwidth of test receiver/spectrum analyzer 200㎐for Quasi- peak detection (QP) at frequency below 9㎑~ 150㎑. 2. The resolution bandwidth and video bandwidth of test receiver/spectrum analyzer 9㎑for Quasi- peak detection (QP) at frequency below 150㎑~ 30㎒. [30㎒to 1㎓] The height of the measuring antenna was varied be…

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Test setup photo 9 kHz ~ 30 MHz 30 MHz ~ 1GHz