2BTR5-JK900VIDEO WALKIE-TALKIE

IV. Detailed explanation of the six major functions of the main menu interface: 1-Video intercom a. Short press the intercom button (confirmation button) to make a call , and the recipient simply needs to short press the ca ll button to connect; b. Single press the right button to switch the video window display; c. Single press the left button to switch between four voice effects (original voice, child voice, robot voice, and adult voice); d. Short press the back button to return to the main menu. 2-WeChat Upon en tering the WeChat chat page, there are five functions avail able at the bottom, arranged from left to right as follows: Emoticons, voice chat, music, photography, and images As shown in the figure below: (1) Emoji operation: Short press the "Call/OK" button to enter the selection mode, short press the "</M" or ">" button to select an expression, and short press the "Call/OK" button to send (2) Voice intercom operation: 1) Long press to activate voice chat, long press to speak, release to end and send. 2)Short press 'volume + or -' to query historic al information, and short press 'call/OK' to lis ten to historical voice. Press the Children's video interphone Instruction Manual EN 1-Video intercom 2-WeChat mode 3-Photo mode 4-Album Mode 5-Theme Mode 6- Game Mode II. Basic function operation of buttons 1) Short press the "+ " key to increase the volume. Short press the "- " key to decrease the volume. 2) Aft er selecting the funct ion, please press the confirm button (call button) to enter 3) To exit this function, please press the return button on the right side. 4) Short press the "+ " key to increase the volume. Short press the "- " key to decrease the volume. 5) In video mode and WeChat chat mode, long press the, " " button to initiate voice communication. In video intercom mode, transmiss ion is through a one-way channel, and only aft er the speaking party ends the conversation by releasing the intercom button can the other party press and hold the intercom button to send voice messages. When a microphone icon appears on the screen, it i ndicates that the other party is speaking. III. Power-on and Power-off Functions Turn the 'power switch', pull up to turn on, and pull down to turn off. When the power switch is turned upwards, the main interf ace of the six -grid layout will appear, as shown below: the "Call/OK" button to confirm, or press the back button to cancel the deletion. 5-T heme mode: Press the intercom button (co nfi rmation button) briefly to enter theme mode, press the left and right buttons briefl y to select the de sir ed theme, and then press the confirmation button 6-Game mode: Press the confirm button briefl y to enter game mode. Both players nee d to enter game mode together to automatically start the game. Use the left and right buttons to selec t the type, and press "Call/OK" briefly to confirm. V. Chargin g Indication: a. Use the charging cable provided with this device, connect it to the charger, and the power indicator lig ht will turn "red". When fully charged , the charging indicator lig ht will automatically turn off. b. Charger compatibility specif ication: 5V/1A. c. Before using this product for the first time, please fully charge it. VI. Product power -on/off and automatic shutdown functions: This product enters working mode upon power-on; it remains in working mode whether in use or not. Whe n the product is in a low battery state, it will au tomatically shut down. If you stop using it, please set the toggle switch to the "OFF" position. To res tart the product, simply toggle the power switch to "OFF" first, and then to "ON" to start it normally. VII. Product pairing and connection methods: This product adopt s a WIFI2. 4G transmission and connection mode; each package contains two intercoms, which have Disp lay CMOS p i x e l B atte r y c apaci t y USB p o r t O p e rating t e m p e ratu re S t o r age te m p e ratu re Po w er supply P ro d uct d imensio n s 2.0 Inch lPS 30W 3.7V 400-650mAh Type-C -20°C~60°C -30°C~70°C 5V/1A 124mm*54mm*23mm been pre-paired. These two intercoms cannot be connected to other dev ices for use. If multiple sets of product s are purchased, they can only be connected one-to-one on a set basis, and multiple products cannot be connected and used simultaneously. VIII. Precautions: a. This product is suitable for outdoor use. Slight echo may occur when used face-to-face at close range. This is a normal acoustic feedback phenomenon. b. This de vice is not waterproof C. The indoor distance of the product should be determined based on the principle of ensuring smooth images. IX. Product specif ications FCC Warning This device complies with Part 15 of the FCC rules. Operat ion is subject to the following two conditions: (1) This device may not cause harmful interf erence, and (2) this device must accept any interf erence received, including interf erence that may cause undesired operation. Note 1: According to Part 15 of the FCC rules, this device has been tested and meets the limits for Class B digital devices. These limits are intended to provide reasonable protection against harmful interf erence in residential instal lations. This device generates, uses, and can radiate radio frequency energy. If not installed andused according to instructions, it may cause harmful interf erence to radio communications. However, there is no guarantee that interference will not occur in a specific installat ion. If this device does cause harmful interf erence to radio or television reception, it can be determined by turning the device off and on. Users are encouraged to try to correct th e interf erence through one or more of the following measures: - Redirect or reposition the receiving antenna. - Increase the spacing between the equipment andthe receiver. - Connect the device to a socket different fromthe one connected to the receiver. - Please consult a dealer or an experienced radio/TV technician for assistance. Note 2: Any changes o…

Text truncated - open the document above for the full version.

Rev 1/26/2023 (Shenzhen Lengsong Technology Co., Ltd.) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: January 27 2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BTR5-JK900 [Shenzhen Lengsong Technology Co., Ltd.] 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. [Shenzhen Lengsong Technology Co., Ltd.] 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, (Applicant signature) (Applicant printed name) Zhenting Tang Rev 1/26/2023 (Shenzhen Lengsong Technology Co., Ltd.) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: January 27, 2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BTR5-JK900 [Shenzhen Lengsong Technology Co., Ltd.] certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Zhenting Tang

Shenzhen Lengsong Technology Co., Ltd. U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: January 27, 2026 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BTR5-JK900 Shenzhen Lengsong Technology Co., Ltd. (“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Company Name: Shenzhen Lengsong Technology Co., Ltd. FRN: 0037772001 Address: 4th Floor, Building 2, Changyi Industrial Park, No. 1 Lirong Road, Xinshi Community, Dalang Sub-district, Longhua District, Shenzhen City, China Signature: Contact Person: Zhenting Tang Tel: +86-18682177970 Email: [email protected]

Shenzhen Lengsong Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: January 27, 2026 Subject; Request for Confidentiality FCC ID: 2BTR5-JK900 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices 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); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature： By: Zhenting Tang Title: Manager

Shenzhen Lengsong Technology Co., Ltd. Date: January 27, 2026 Product Model Number: JK900, JK200, JK300, JK500, JK600, JK700, JK800, D1, D2, D3, D5, D6, D7, D8, D9 FCC ID: 2BTR5-JK900 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following: • Testing • Approval applications and procedures We declare that QAI Laboratories Ltd. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by QAI Laboratories Ltd. on our behalf shall have the same effect as acts of our own. Signature： By: Zhenting Tang Title: Manager Email: [email protected] Telephone: +86-18682177970 On behalf of: Shenzhen Lengsong Technology Co., Ltd.

Shenzhen Lengsong Technology Co., Ltd. Model Difference Statement DATE: January 27, 2026 FCC ID: 2BTR5-JK900 Dear Sir/Madam, Added models JK200, JK300, JK500, JK600, JK700, JK800, D1, D2, D3, D5, D6, D7, D8, D9 basis of the original product JK900. The color of appearance and model name of series models listed are different from the main model, but the circuit and the electronic construction are the same, declared by the manufacturer. Sincerely, Name: Zhenting Tang Title: Manager Company name: Shenzhen Lengsong Technology Co., Ltd. Address: 4th Floor, Building 2, Changyi Industrial Park, No. 1 Lirong Road, Xinshi Community, Dalang Sub-district, Longhua District, Shenzhen City, China

文件版本（FileVersion）：202201版权所有（propertyin copyright） 1 样品承认书 Parts ApprovalSheet 生产供应商： Supplier 适用项目： JK800 Type/Spec 品牌：NQI Brand 送样日期：202 5/11 /18 Send out Date 承认日期： ApproveDate 物料名称：WIFI天线 Parts Name NQI规格: NQI-J K200-TG4.4-71X Parts No 客户料号： Quantity 文件编号：NQI-RD-SPEC-2025110 6 DocumentNo 样品 版本：V0 Version SupplierCustomer ApprovedByPreparedByEngineeringDeptQualityDept 文件版本（FileVersion）：202201版权所有（propertyincopyright） 2 承认书履历表 （Resume） 日期 （Date） 天线版本 （Versins） 变更原因 （Reasonsforchange） 变更内容 （Contentofchange） 备注 （Note） 2025.11.18V0首版发行 文件版本（FileVersion）：202201版权所有（propertyincopyright） 3 目录 一 . 样品及说明 （Samplepictureanddescription）..........................................................4 二 . 测试设备及项目 （Testequipmentanditems）...................................................4-6 三 . 暗室连接及坐标 （Chamberconnectionandcoordinates）........................................6 四 . 天线匹配网络 （Antennamatchingnetwork）..........................................................7 五 . 天线电性能测试数据 （ElectricalperfornancetestData）.....................................7-9 六.天线结构图纸（Antennastructuredrawing）.........................................................10 七.重点尺寸检验报告（Keydimensioninspectionreport）............................................11 文件版本（FileVersion）：202201版权所有（propertyincopyright） 4 一 . 样品及说明 （Samplepictureanddescription） ： 二.试设备及项目（Testequipmentanditems）： 类别（Class）测试项目（Testitem）设备（Equipment） 1.Sparameter 1.回波损耗(RL) 2.驻波比（VSWR） 3.斯密斯原图（Smithchart） 网分（VNA）:AgilentE5071B R&SZVB8 Protek A333 电气参数说明（ElectricalSpecifications） 频率范围（Frequencyrange）（2400-2500)MHz 特性阻抗（impedance）50ohm 电压驻波比（VSWR）≤2.9 峰值增益（Gain）3.92DBi 极化形式（Polarization）线性 辐射方向（Radiationdirection）全向 连接方式说明（ConnectionModeDescription） 连接器（connector）IPEX一代 线缆规格（Cablespecifications）1.13*71MM同轴线 工作/储存温度（Working/Storagetemperature） 工作温度（Workingtemperature）-30°C～65°C 储存温度（Storagetemperature）-30°C～75°C 文件版本（FileVersion）：202201版权所有（propertyincopyright） 5 2.耦合测试（ Coupling testing） 1.发射功率（MAXPower） 2.接收灵敏度（MINSens） 1.2G/3GTester：Agilent8960 2.Thecouplingbox：TESCOMTC-5060A 3.3DChamber：ETS3DChamber（5x3x3） 3.3D无源测试 （PassiveTest） 1.效率（Effeciency） 2.增益（Gain） 3.辐射方向图 （Radiationpattern） 1.3DChamber：TEM243DChamber（5x5x5） ETS3DChamber（5x3x3） 2.网分（VNA）：AgilentE5071B R&SZVB8 4.3D有源测试 （ActiveTest） 1.3D功率（TRP） 2.3D灵敏度（TIS） 3.吞吐率（Throughputrate） 1.3DChamber：TEM243DChamber（5x5x5） ETS3DChamber（5x3x3） 2.2G/3GTester:Agilent8960 3.4GTester：MT8820C/CMW500 4.WIFI/BT/NB-iotTester：CMW500 5.5GTester：SP9500-CTS 6.Head：HEAD-P10（FACE-P10） 文件版本（FileVersion）：202201版权所有（propertyincopyright） 6 三.暗室连接及坐标（Chamberconnectionandcoordinates）： 文件版本（FileVersion）：202201版权所有（propertyincopyright） 7 四 . 天线匹配网络 （Antennamatchingnetwork） ： 五 .RL/VSWR/SmithChat （回波损耗 / 驻波比 /Smith ） Element（ Value ） E1(0201)主板原始 匹配，无更 改 E2(0201) E3(0201) 文件版本（FileVersion）：202201版权所有（propertyincopyright） 8 5.1增益及效率(Gainandefficiency) Frequency/MhzMaxGain/dBiEfficiency/% 24003.4157.41 24102.7755.46 24202.9857.02 24302.5854.95 24402.8158.48 24503.5363.1 24603.7865.77 24703.9265.16 24803.0260.67 24902.9861.8 25002.7363.1 5.23D 图 文件版本（FileVersion）：202201版权所有（propertyincopyright） 9 5.3TRP&TISOTA 数据 NQIANTTRP&TISparameterSummaryofJK200 BAND WIFA-N（65M） CHANNEL 1611 TRP(dBm) 21.3820.9519.58 TIS(dBm) -73.93-74.53-72.74 文件版本（FileVersion）：202201版权所有（propertyincopyright） 10 六、结构图纸 （Antennastructuredrawing） 文件版本（FileVersion）：202201版权所有（propertyincopyright） 11 七重点尺寸检验报告 （Keydimensioninspectionreport） ： 尺寸检验报告 客户 正方芯 项目 JK200 材质 铜管+同轴线 环保材料非环保材料 外观检查项目 □漏漆□断线□短路□划伤□脏污□开裂 不良数： 0 轻微严重致命 外观判定结果：合格不合格 功能或尺寸检查记录 NO检查序号尺寸公差 检查结果 检测仪器判定 12345 铜管 171.00±0.1571.0571.0071.0471.0371.02DNOK 224.00±0.1524.0424.0024.0224.0024.05DNOK 324.50±0.1524.5224.5324.5024.5424.52DNOK 450.00±0.1550.0450.0050.0550.0250.02DNOK 54.40±0.154.404.424.444.404.42DNOK 总体判定：合格不合格 不合格处理方式：返工特采使用 计量仪器代号说明：投影仪-PP塞规-PG高度规-HG角度规-AG游标卡尺-N数显卡尺-DN 外径千分尺-M 其它测试手段代码：三座标-3D螺纹规-SG专用治具-SE目视-E 备注： 测定人：刘敏

Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report Annex A. EUT External Photos JK900 EUT View 1 EUT View 2 Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report EUT View 3 EUT View 4 Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report EUT View 5 EUT View 6 Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report EUT View 7

Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report Annex D. Label and Information FCC Label Sample FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location Label Location

Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report Annex B. EUT Internal Photos EUT Internal View 1 EUT Internal View 2 Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report EUT Internal View 3 EUT Internal View 4 Integral Antenna Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report EUT Internal View 5 EUT Internal View 6

FCC ID: 2BTR5-JK900 RF Exposure Evaluation According to KDB 447498 D01 General RF Exposure Guidance v06 and part 2.1093，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. 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 Here, The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. For 2.4GWiFi Max Conducted Power(dBm) Tune-up Power(dBm) Max Tune-up Power(dBm) Max Power(mW) Frequency(MHz) Min. distance(mm) Calc. thresholds limit 7.27 7(±1) 8 6.31 2412 5 1.95996 3.0 So a SAR test is not required

Report No: SSP26010425-1E FCC Test Report Page 1 of 50 FCC TEST REPORT FCC ID: 2BTR5-JK900 Report No. : SSP26010425-1E Applicant : Shenzhen Lengsong Technology Co., Ltd. Product Name : VIDEO WALKIE-TALKIE Model Name : JK900 Test Standard : FCC Part 15.247 Date of Issue : 2026-01-26 Shenzhen CCUT Quality Technology Co., Ltd. 1F, Building 35, Changxing Technology Industrial Park, Yutang Street, Guangming District, Shenzhen, Guangdong, China; (Tel.:+86-755-23406590 website: www.ccuttest.com) This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd. Report No: SSP26010425-1E FCC Test Report Page 2 of 50 Test Report Basic Information Applicant..................................: Shenzhen Lengsong Technology Co., Ltd. Address of Applicant...............: 4th Floor, Building 2, Changyi Industrial Park, No. 1 Lirong Road, Xinshi Community, Dalang Sub-district, Longhua District, Shenzhen City, China Manufacturer..........................: Shenzhen Lengsong Technology Co., Ltd. Address of Manufacturer........: 4th Floor, Building 2, Changyi Industrial Park, No. 1 Lirong Road, Xinshi Community, Dalang Sub-district, Longhua District, Shenzhen City, China Product Name.........................: VIDEO WALKIE-TALKIE Brand Name.............................: - Main Model..............................: JK900 Series Models..........................: JK200, JK300, JK500, JK600, JK700, JK800, D1, D2, D3, D5, D6, D7, D8, D9 Test Standard..........................: FCC Part 15 Subpart C KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.4-2014 ANSI C63.10-2020 Date of Test .............................: 2026-01-17 to 2026-01-20 Test Result...............................: PASS Tested By ................................: (Colin Chen) Reviewed By............................: (Lorzix Luo) Authorized Signatory............: (Lahm Peng) Note : This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen CCUT Quality Technology Co., Ltd.. All test data presented in this test report is only applicable to presented test sample. Report No: SSP26010425-1E FCC Test Report Page 3 of 50 CONTENTS 1. General Information ....................................................................................................................................................5 1.1 Product Information .............................................................................................................................................5 1.2 Test Setup Information..........................................................................................................................................6 1.3 Compliance Standards ...........................................................................................................................................7 1.4 Test Facilities ........................................................................................................................................................7 1.5 List of Measurement Instruments ..........................................................................................................................8 1.6 Measurement Uncertainty .....................................................................................................................................9 2. Summary of Test Results ........................................................................................................................................... 10 3. Antenna Requirement ............................................................................................................................................... 11 3.1 Standard and Limit.............................................................................................................................................. 11 3.2 Test Result .......................................................................................................................................................... 11 4. Conducted Emissions ................................................................................................................................................ 12 4.1 Standard and Limit.............................................................................................................................................. 12 4.2 Test Procedure.................................................................................................................................................... 12 4.3 Test Data and Results .......................................................................................................................................... 13 5. Radiated Emissions ................................................................................................................................................... 16 5.1 Standard and Limit.............................................................................................................................................. 16 5.2 Test Procedure.................................................................................................................................................... 16 5.3 Test Data and Results .......................................................................................................................................... 18 6. Band-edge Emissions(Radiated) ............................................................................................................................... 22 6.1 Standard and Limit.............................................................................................................................................. 22 6.2 Test Procedure................................................................................................................................................…

Text truncated - open the document above for the full version.

Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report Annex C. Test Photos Conducted Emission Test View 1 Radiated Emission Test View Below 1GHz Report No: SSP26010425-1E FCC ID: 2BTR5-JK900 Annex of Test Report Radiated Emission Test View Above 1GHz