2BXTU-H5LITEOver-ear Headphones

深圳市澜科创科技有限公司 独立站产品说明书 20260902 IMPORTANT SAFETY INSTRUCTIONS-C AREFULLY • Retain this manual for future reference. It contains important safety and operating information. • Read all instructions before using the product and follow all safety warnings. • This product is not intended for use by children or persons with reduced physical, sensory, or mental capabili ties unless properly supervised. • Do not allow children to play with the product. • Do not expose the product to fire or excessive heat. • Do n ot use or store the product in environments with extreme temperatures, moisture, or humidity. • Do not use the product if it has been dropped, damaged, or is not operating normally. • Do not disassemble, modify, or attempt to repair the product. Doing so may cause injury or damage. • Do not crush, puncture, throw, or apply excessive force to the product. • Keep the product away from flammable or explosive materials. • The buil t-in battery is not user-replaceable. • Do not open the product or attempt to replace the battery. • Charge the product only with the provided or specified charging cable and a certified power source. • Do not charge the product near heat sources or in high-temperature environments. • If the product becomes excessively hot, emits an unusual odor, or shows abnormal behavior, stop using it immediately and disconnect from the power source. • Use this product only for its intended purpose and in accordance with this manual. • LK shall not be liable for damage or injury resulting from misuse, unauthorized modification, improper battery use, or operation outside recommended conditions. • Dispose of the product and batteries in compliance with local environmental and electronic waste regulations. • Thank yo u for purchasing LK Hybrid Active Noise Cancelling Headphones. Please read this User Manual thoroughly before use of the product and retain it for future reference. If yo u have any problem u sing this product, please contact us by the email address provided on the back cover of the manual. ANC / Transparency Mode Single-click ANC button to switch between ANC Mode, Transparency Mode, and Normal Mode. Charging Instructions FCC STATEMENT: • When the battery is low, the headphones will play the voice prompt "Low Battery" and the indicator will flash red every 3 seconds. • Charge the headphones with the included charging cable. The indicator stays solid red during charging and turns solid blue once fully charged. This device complie s with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference receive d, including interference that may cause undesired operation. NOTE 1: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installe d and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television rec eption, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receive r. • Connect the equipment into an outlet on a circuit different from that to which the receive r is connected. • Consult the dealer or an experienced radio/TV technician for help. NOTE 2: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. What this warranty covers? Shenzhenshi Lankechaung Technology Co.,Ltd. (Manufacturer: "Lankechaung") warrants to the original purchaser of this LK product that t he product shall be free of defects in design, assembly, material, or workmanship. What the period of coverage is? Lankechaung warrants the LK product for 12 months. What will we do to corre ct pro blems? Lankechaung will repair or replace, at its option, any defective product free of charge (except for shipping charges for the product). What is not covere d by this warranty? All above warranties are null and void if the LK product is not provided to Lankechaung for inspecti on upon Lankechaung’s request at the sole expense of the purchaser, or if Lankechaung determines that the LK product has been improperly installe d, altered in any way, or tampered with. The LK Product Warranty does not protect against acts of God such as flood, earthquake, lightning, war, vandalism, theft, normal-use wear and tear, erosion, depletion, obsolescence, abuse, damage due to low voltage disturbances (e.g. brownouts or sags), non-authorized program, or system equipment modi fication or alteration. How to claim the warranty? For more information, please contact yo ur retaile r, visit the LK offici al website, or reach us via the email address provided on the back cover. To extend the warranty period, please visit LK website and register yo ur LK products within 90 days of purchase. Disclaimer Every effort has been made to ensure that the information and procedures in this guide are accurate and complete, no liabilit y can be accepted for any errors or omissions and we reserve the right to make any changes without further notice to any products mentioned herein. Limite d 12-Month Warranty Correct Disposal of This Product (Waste Electrical& Electronic Equipment) This Marking shown…

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Shenzhen Tianji Chuangke Information Co., Ltd. 2026/09/02 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for FCC ID: 2BXTU-H5LITE [Shenzhen Tianji Chuangke Information 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, Client’s signature: Client’s name / title : Wang Tao /Assistant to General Manager Shenzhen Tianji Chuangke Information Co., Ltd. 2026/09/02 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for FCC ID: 2BXTU-H5LITE [Shenzhen Tianji Chuangke Information 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. Sincerely, Client’s signature: Client’s name / title : Wang Tao /Assistant to General Manager

Shenzhen Tianji Chuangke Information Co., Ltd. 2026/09/02 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR Product Name: Over-ear Headphones FCCID: 2BXTU-H5LITE Model(s): H5Lite To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description required to be submitted with this application be permanently withheld from public review. 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. Please contact me if there is any information you may need. Sincerely, Client’s signature: Client’s name / title : Wang Tao / Assistant to General Manager Contact information / address: 10A, B Block, Tower 6, 16 Yifeng Rd, Longgang, Shenzhen, Guangdong, China

Shenzhen Tianji Chuangke Information Co., Ltd. 2026/09/02 Eurofins Electrical and Electronic Testing NA, Inc. 914 W. Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen BCTC Technology Co., Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. 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). This agreement expires one year from the current date. Sincerely, Client’s signature: Client’s name / title : Wang Tao / Assistant to General Manager Contact information / address: 10A, B Block, Tower 6, 16 Yifeng Rd, Longgang, Shenzhen, Guangdong, China

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FCC ID: 2BXTU-H5LITE Portable device According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. According to KDB447498 D01 General RF Exposure Guidance V06 The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. BLE Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion GFSK(1M bps) 2.480 1.06 1.28 1±1 2.00 1.58 <5 0.49918 3.00 YES BT Modulation Channel Freq. (GHz) Conduct ed power (dBm) Conducte d power (mW) Tune-up power (dBm) Max tune-up power (dBm) Max tune-up power (mW) Distance (mm) Result calculatio n SAR Exclusion threshold SAR test exclusion GFSK 2.480 2.16 1.64 2±1 3.00 2.00 <5 0.62843 3.00 YES π/ 4 DQPSK 2.480 2.23 1.67 2±1 3.00 2.00 <5 0.62843 3.00 YES 8DPSK 2.480 2.09 1.62 2±1 3.00 2.00 <5 0.62843 3.00 YES Conclusion: For the max result : 0.62843＜3, the SAR testing is not required.

Customer Shenzhen Lighkeep Co., Ltd. Project H5C Antenna Revision AO Prepared by 18814303605 Checked by Date 2025.04.11 Purpose This report is to measure the performance of antenna for H5C The antenna operating frequency at 2400-2500MHz All test data are showed as below. Content 2. Product Overview & Dimension ● 3.OTA Data Shenzhen He Yi Xun Technology Co., Ltd. 02 03 1. Test system 01 Shenzhen He Yi Xun Technology Co., Ltd. Sequence Number Test Item equipment S parameter VSWR Agilent 5071C & Agilent 5071B OTA Test TRP& TIS Agilent 8960 & CMW500 STIMO Gain & Efficiency Gain & Efficiency SATIMO Agilent 5071C 1.TestSystem Shenzhen He Yi Xun Technology Co., Ltd. Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Antenna size Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd. Address: Building 2, 1903-1905, Jiufang Plaza, Tie Zai Road, Gongle Community, Xixiang Street, Bao'an District, Shenzhen City. TEL: 0755-23591525 FAX: 0755-23591525 Shenzhen He Yi Xun Technology Co., Ltd.

No.：BCTC/KJ-RF-ICT-001 Page 1 of 54 Edition：B.1 TEST REPORT Shenzhen BCTC Technology Co., Ltd. Report No.: BCTC2608426226-1E Applicant: Shenzhen Tianji Chuangke Information Co., Ltd. Product Name: Over-ear Headphones Test Model: H5Lite Tested Date: 2026-08-11 to 2026-08-24 Issued Date: 2026-08-24 Report No.: BCTC2608426226-1E No.：BCTC/KJ-RF-ICT-001 Page 2 of 54 Edition：B.1 FCC ID: 2BXTU-H5LITE The test report is effective only with both signature and specialized stamp.This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Technology Co., Ltd, this report can’t be reproduced except in full.The tested sample(s) and the sample information are provided by the client. Product Name: Over-ear Headphones Trademark: Model/Type Ref.: H5Lite Prepared For: Shenzhen Tianji Chuangke Information Co., Ltd. Address: 10A, B Block, Tower 6, 16 Yifeng Rd, Longgang, Shenzhen, Guangdong, China Manufacturer: Shenzhen Lighkeep Co., Ltd. Address: 1st, 3rd and 4th Floors, Factory Building, No.19 South Baotong Road, Xikeng Community, Yuanshan Subdistrict, Longgang District, Shenzhen City, Guangdong Province, P.R.China Prepared By: Shenzhen BCTC Technology Co., Ltd. Address: Room 101M, Unit 1, Building1, Pengyuan, No.18, Lilang Road, Shanglilang, Nanwan Subdistrict, Longgang District, Shenzhen, Guangdong, China. Sample Received Date: 2026-08-07 Sample tested Date: 2026-08-11 to 2026-08-24 Report No.: BCTC2608426226-1E Test Standards: 47 CFR Part 15 Subpart C (clause 15.247) ANSI C63.10-2020 Test Results: PASS Remark: This is Bluetooth BLE radio test report. Prepared by : Reviewer by : Approved by: Eric Yang Mike Zheng Sewen Guo Report No.: BCTC2608426226-1E No.：BCTC/KJ-RF-ICT-001 Page 3 of 54 Edition：B.1 Table of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 9 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List ........................................................................................................ 10 4.5 Test Mode ........................................................................................................... 10 4.6 Table Of Parameters Of Text Software Setting ................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 14 6.1 Block Diagram Of Test Setup .............................................................................. 14 6.2 Limit .................................................................................................................... 14 6.3 Test procedure .................................................................................................... 14 6.4 EUT Operating Conditions .................................................................................. 14 6.5 Test Result ............................................................................................................ 15 7. Radiated Emissions ............................................................................................. 17 7.1 Block Diagram Of Test Setup .............................................................................. 17 7.2 Limit .................................................................................................................... 18 7.3 Test procedure .................................................................................................... 19 7.4 EUT operating Conditions ................................................................................... 20 7.5 Test Result .......................................................................................................... 21 8. Radiated Band Emission Measurement and Restricted Bands Of Operation ...... 25 8.1 Block Diagram Of Test Setup .............................................................................. 25 8.2 Limit .................................................................................................................... 25 8.3 Test Procedure ................................................................................................... 26 8.4 EUT Operating Conditions .................................................................................. 26 8.5 Test Result .......................................................................................................... 27 9. Power Spectral Density Test ............................................................................... 28 9.1 Block Diagram Of Test Setup .............................................................................. 28 9.2 Limit .................................................................................................................... 28 9.3 Test procedure .................................................................................................... 28 9.4 EUT Operating Co…

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TEST SETUP PHOTOGRAPHS Conducted Emission Measurement Photos Radiated Measurement Photos ----------------The end----------------