2BRRS-IST-DSHINEI.st LUCENIA DUAL SHINE

Rev 1/26/2023 BTB Korea Co.,Ltd. 7, Dongwon-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2025-08-27 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BRRS-IST-DSHINE [BTB Korea Co.,Ltd.] (“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. [BTB Korea Co.,Ltd.] (“the applicant”) certifies that the equipment for which authorization is sought does not include 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 pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, Changsik, Shin / Deputy General Manager Rev 1/26/2023 BTB Korea Co.,Ltd. 7, Dongwon-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2025-08-27 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BRRS-IST-DSHINE [BTB Korea Co.,Ltd.] (“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. And, applicant is not a named entity or any of its subsidiaries or affiliates. Sincerely, Changsik, Shin / Deputy General Manager

Rev 1/26/2023 BTB Korea Co.,Ltd 7, Dongwon‐ro, Bundang‐gu, Seongnam‐si, Gyeonggi‐do, Republic of Korea Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2025‐08‐26 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID or Grantee Code:2BRRS‐IST‐DSHINE Applicant FRN:0037412814 [BTB Korea Co.,Ltd] (“the applicant”) certifies that, as of the date of the filing of the application, [FCC US Agent, LLC]is our designated U.S. agent for service of process for the above referenced FCC ID. [BTB Korea Co.,Ltd] 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 the equipment. [FCC US Agent, LLC] accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Name: FCC US Agent, LLC U.S. Agent FRN:0033402884 Address:3722 Illinois Avenue, Saint Charles, IL, 60174, USA Contact Person:Tim Payne Tel.:708‐571‐3148 Email:[email protected] Sincerely, BTB Korea Co.,Ltd [FCC US Agent, LLC] Changsik, Shin Tim Payne [Insert Applicant signature] [U.S. Agent signature]

BTB Korea Co.,Ltd 7, Dongwon-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Aug 27, 2025 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Letter of Authorization We, the undersigned, hereby authorize Jong-Myoung, Shin of EMC Labs Co., Ltd. to act on our behalf in all manners relating to application for equipment authorization for FCC ID: 2BRRS-IST-DSHINE Any and all acts carried out by Jong-Myoung, Shin of EMC Labs Co., Ltd. on our behalf shall have the same affect as acts of our own. This authorization is valid until further written notice from BTB Korea Co.,Ltd. “I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a).” Sincerely, Changsik, Shin / Deputy General Manager

BTB Korea Co.,Ltd. 7, Dongwon-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: 2BRRS-IST-DSHINE 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: Exhibit Type File Name Block Diagram Schematics Operational Description Part List [IST-DSHINE] BLK [IST-DSHINE] SCH [IST-DSHINE] OpDes [IST-DSHINE] Part List 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. In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); Exhibit Type File Name External Photos Internal Photos Test Setup Photos Manual [IST-DSHINE] EXT Photo [IST-DSHINE] INT Photo [IST-DSHINE] Test Setup Photo [IST-DSHINE] User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. Sincerely, Changsik, Shin / Deputy General Manager

BTB Korea Co.,Ltd M/N: IST-DSHINE FCC ID : 2BRRS-IST-DSHINE IST-DSHINE_Label & Location Label location Device Rear Side

Model Name : FCC ID : (mm)(dBm)(dB)(dBm)(mW) 2402-1.94-0.940.813.00PASS 2441-1.80-0.800.833.00PASS 2480-1.61-0.610.873.00PASS 2402-1.17-0.170.963.00PASS 2441-0.910.091.023.00PASS 2480-0.750.251.063.00PASS 2402-1.03-0.030.993.00PASS 2441-0.750.251.063.00PASS 2480-0.580.421.103.00PASS 8DPSK 5.00± 1.00 0.3078 0.3310 0.3469 π/4DQPSK 5.00± 1.00 0.2981 0.3190 0.3336 Standalone SAR Test exclusion thresholds for 100MHz to 6GHz at test separation distance ≤ 50 mm LimitResult GFSK 5.00± 1.00 0.2496 0.2599 0.2737 Modulation Frequency (MHz) Min. Test separation distance Measured Maximum Average power Tune-up tolerance Max. Power with tune-up tolerance 2BRRS-IST-DSHINESeparation distance : 5.0 mm MPE Calculation KDB 447498 - 4.3.1 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 IST-DSHINEDevice Category : Portable device

Report No.: KR0140-RF2508-003 EMCLabs-QPF-26-25 [ Revision_01 / 2024. 04. 15 ] 1 / 55 This test report shall not be reproduced except in full, Without the written approval. TEST REPORT 100, Jangjateo-ro, Hobeop-myeon, Icheon-si, Gyeonggi-do, 17396, Korea Tel: 031-637-8898 / Fax: 0505-116-8895 1. Client • Name ......................... : BTB Korea Co.,Ltd • Address...................... : 7, Dongwon-ro, Bundang-gu, Seongnam-si, Gyeonggi- do, Republic of Korea 2. Use of Report ................. : FCC Approval 3. Sample Description • Product Name : I.st LUCENIA DUAL SHINE • Model Name : IST-DSHINE 4. Date of Receipt ............... : 2025-07-01 5. Date of Test ................... : 2025-07-31 ~ 2025-08-08 6. Test Method ................... : FCC Part 15 Subpart C 15.247 7. Test Results ................... : Refer to the test results ※ The results shown in this test report are the results of testing the samples provided. ※ This test report is prepared according to the requirements of ISO / IEC 17025. Affirmation Tested by Jong-Myoung, Shin (Sign) Technical Manager Kyung-Taek, Lee (Sign) Aug 20, 2025 EMC Labs Co., Ltd. (stamp) R Report No.: KR0140-RF2508-003 EMCLabs-QPF-26-25 [ Revision_01 / 2024. 04. 15 ] Page 2 / 55 This test report shall not be reproduced except in full, Without the written approval. 본 시험성적서는 (주)ABCD의 서면 동의 없이 무단 전제 및 복사를 할 수 없습니다. Contents 1. Applicant & Manufacturer & Test Laboratory Information··································· 4 2. Equipment under Test(EUT) Information······················································· 4 3. Test Summary······················································································· 5 4. Used equipment on test··········································································· 7 5. Antenna Requirement·············································································· 7 6. 20 dB Bandwidth & Occupied Bandwidth (99%)·············································· 9 7. Number of Hopping Frequencies ······························································· 13 8. Time of Occupancy (Dwell Time)································································ 16 9. Carrier Frequencies Separation·································································· 18 10. Peak Output Power ················································································ 22 11. TX Radiated Spurious Emission and Conducted Spurious Emission······················ 29 12. Conducted Emission ·············································································· 49 APPENDIX APPENDIX I TEST SETUP············································································· 52 APPENDIX II UNCERTAINTY·········································································· 54 R Report No.: KR0140-RF2508-003 EMCLabs-QPF-26-25 [ Revision_01 / 2024. 04. 15 ] Page 3 / 55 This test report shall not be reproduced except in full, Without the written approval. 본 시험성적서는 (주)ABCD의 서면 동의 없이 무단 전제 및 복사를 할 수 없습니다. Version TEST REPORT NO. DATE DESCRIPTION KR0140-RF2508-003 Aug 20, 2025 Initial Issue R Report No.: KR0140-RF2508-003 EMCLabs-QPF-26-25 [ Revision_01 / 2024. 04. 15 ] Page 4 / 55 This test report shall not be reproduced except in full, Without the written approval. 본 시험성적서는 (주)ABCD의 서면 동의 없이 무단 전제 및 복사를 할 수 없습니다. 1. Applicant & Manufacturer & Test Laboratory Information 1.1 Applicant Information Applicant BTB Korea Co.,Ltd Applicant Address 7, Dongwon-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Contact Person Changsik, Shin Telephone No. +82-2-3462-5400 Fax No. +82-70-7611-2375 E-mail [email protected] 1.2. Manufacturer Information Manufacturer BTB Korea Co.,Ltd Manufacturer Address 7, Dongwon-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea 1.3 Test Laboratory Information Laboratory EMC Labs Co., Ltd. Laboratory Address 100, Jangjateo-ro, Hobeop-myeon, Icheon-si, Gyeonggi-do, Republic of Korea Contact Person Jong-Myoung, Shin Telephone No. +82-31-637-8895 Fax No. +82-505-116-8895 FCC Designation No. KR0140 FCC Registration No. 580000 IC Site Registration No. 28751 R Report No.: KR0140-RF2508-003 EMCLabs-QPF-26-25 [ Revision_01 / 2024. 04. 15 ] Page 5 / 55 This test report shall not be reproduced except in full, Without the written approval. 본 시험성적서는 (주)ABCD의 서면 동의 없이 무단 전제 및 복사를 할 수 없습니다. 2. Equipment under Test(EUT) Information 2.1 General Information Product Name I.st LUCENIA DUAL SHINE Model Name IST-DSHINE FCC ID 2BRRS-IST-DSHINE Rated Voltage DC 3.7 V 2.2 Additional Information Operating Frequency 2 402 MHz ~ 2 480 MHz Number of channel 79 Modulation Type BDR Mode(GFSK), EDR Mode(Pi/4 DQPSK, 8DPSK) Antenna Type & Gain PCB Pattern Antenna(with Max gain: 2.51 dBi) Firmware Version 1.0 Hardware Version 1.0 2.3 Test Frequency Test mode Test Frequency (MHz) Low Frequency Middle Frequency High Frequency GFSK 2 402 2 441 2 480 Pi/4 DQPSK 2 402 2 441 2 480 8DPSK 2 402 2 441 2 480 2.4 Worst-Case BDR GFSK (DH5) EDR 8DPSK (3-DH5) Note: The power measurement has been conducted to determine the worst-case mode from all possible Combinations between available modulations, data rates. 2.5 Mode of operation during the test - The EUT continuous transmission mode during the test with set at Low Channel, Middle Channel, and High Channel. To get a maximum radiated emission levels from the EUT, the EUT was moved throughout the XY, YZ, XZ planes. 2.6 Modifications of EUT - None R Report No.: KR0140-RF2508-003 EMCLabs-QPF-26-25 [ Revision_01 / 2024. 04. 15 ] Page 6 / 55 This test report shall not be reproduced except in full, Without the written approval. 본 시험성적서는 (주)ABCD의 서면 동의 없이 무단 전제 및 복사를 할 수 없습니다. 3. Test Summary Applied FCC Rule IC Rule Test Items Test Condition Result 15.203 - Antenna Requirement Conducted C 15.247(a) - 20 dB Bandwidth C - RSS GEN (6.7) Occupied Bandwidth (99%) C 15.247(a) RSS-247 (5.1) Number of Hopping Frequencies C 15.247(a) RSS-247 (5.1) Time of Occupancy (Dwell Time) C 15.247(a)…

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深圳市海凌科电子有限公司HLK-B25板载天线规格书 1 深圳市海凌科电子有限公司 HLK-B25板载天线规格书 深圳市海凌科电子有限公司HLK-B25板载天线规格书 2 一、概述 该 PCB 天线是根据HLK-B25的尺寸设计的板载天线。 二、基本参数： 参数指标备注 频段FrequencyRange(MHz)2400-2500 增益Gain(dBi)2.5 驻波比V.S.W.R.＜1.5 极化PolarizationVertical 不圆度Non-Circularity(dB)±0.5 输入阻抗Impedance(Ω)50 雷电保护LightningProtectionDirectGround 最大功率MaximumInputPower(W)50 工作温度OperatingTemperature(°C)-40~+70 储藏温度RepositionTemperature(°C)-55~+80 表 1：基本参数 深圳市海凌科电子有限公司HLK-B25板载天线规格书 3 三、回波损耗（S11/VSWR） 2.4GHz2.45GHz2.5GHz S11（dB）-10.1-28-10.7 VSWR1.91.11.9 深圳市海凌科电子有限公司HLK-B25板载天线规格书 4 四、辐射模式（2.45GHz） X-YplaneX-YplaneX-Yplane Avggain(dBi)-3.5-0.36-1.76 Peakgain(dBi)2.082.511.46