FCCID.CO- FCC ID Database
HomeCompaniesEquipment ClassesSearch

© 2026 FCC ID Database. All rights reserved.

AboutContactData sourced from FCC public records
  1. Home/
  2. Dongguan Yuaohong Technology Co., LTD/
  3. 2BR43-M28S

2BR43-M28SSmart Visual Doorbell

Dongguan Yuaohong Technology Co., LTD
Smart Visual Doorbell - FCC ID 2BR43-M28S - Dongguan Yuaohong Technology Co., LTD
Click to zoom

Application Details

Equipment Class
DTS - Digital Transmission System
Date of Grant
Jun 29, 2026
Application Purpose
Original Equipment
Equipment Note
Smart Visual Doorbell
Frequency Range
2412.00000000 - 2462.00000000
Company
Dongguan Yuaohong Technology Co., LTD
Country
China

Documents & Files

Select a file to view

Users Manual

↗

Attestation Statements

↗
↗

Cover Letter(s)

↗
↗

External Photos

↗

ID Label/Location Info

↗

Internal Photos

↗

RF Exposure Info

↗

Test Report

↗
↗
↗

Test Setup Photos

↗

Document Text

Text extracted from the exhibit documents filed with the FCC. Open a document above to read the original.

Users Manual

Instructions 1 DIRECTORY English.................................................................................... Deutsch................................................................................. Français.................................................................................... Español................................................................................. Italiano.................................................................................... 中文............................................................................................. 2-9 10-17 18-25 26-33 34-41 42-49 温馨提示:如长时间使用,显示器需要供电使用。 建议用产品标配的U SB线接5V,1-2A的USB口取电,可以接手机 适配 器的U SB口取电等。 CN 42 一、门铃 ①复位键 ②TYPE-C充电口 ③预设TF口 ④光敏感应 ⑤镜头 ⑥PIR感应 ⑦麦克风 ⑧LED补光灯 ⑨按键 ⑩预设开关 43 二、显示器 ①指示灯 ②上键/+键 ③下键/-键 ④返回键 ⑤菜单键 ⑥拨号键/确认键 ⑦开关机键 ⑧充电口 ⑨复位键 ⑩插卡口⑪喇叭⑫天线⑬背板⑭支架 ⑮麦克风 44 1.找到显示器的开关键,开机后长按M按键,显示器显 示配对提示,并进入30秒倒计时。 2.显示器显示“配对**30”提示后,再同时长按门铃按 钮,按住不要松手,直到显示器显示“配对** √”提示, 则配对联机成功。 温 馨提醒:出厂已经配对成功,无特殊情况,用户无需 自行再次配对。 45 1. 1.1.长按“M”进入配对模式。 1.2.短按进入菜单选择及设置。 2 . 2.1.当访客按响门铃时,室内机(显示器)显示访客及 响铃提醒。按一次“拨号键”可接通对讲。 2.2.接通对讲后,室内机长按“拨号键”可对讲说话, 室外机(门铃)可以听到室内机的说话,室外机说 话无需任何操作。 2.3.再按一次“拨号键”挂断联机,室内机和室外机 同时进入休眠。 46 2.4.休眠模式下,长按室内显示器“拨号键”3秒,可 以唤醒室外机门铃,查看室外门口情况。 2.5.菜单模式下“拨号键”也是确认键,确认设置。 3 . 3.1.直接按键是调节对讲音量。 3.2.进入菜单后,按” 键进入下一个选项或减小 音量/亮度;按“ ”键进入上一个选项或加大音 量/亮度。 3.3. 键是返回键,进入菜单设置界面,按此键, 则返回上一级。 4 .菜单功能: 4.1.录像功能:此功能需插入TF卡,建议TF卡格式化后 使用;按响门铃,显示器自动开启录像,录满后自动 循环覆盖,保存最新录像。 注 意:使用8-32G,C10等级的高速内存卡。 4.2.铃声设置:6首铃声音乐可选。 4.3.设置: 语言设置:按▼、▲键选择语言,按“ ”确认; 亮度设置:按▼、▲键调整屏幕亮度; 铃声音量:按▼、▲调整铃声音量; 47 时间设置:按▼、▲调整时间数值,按“”键进入 下一项设置,全部设置好,按“M”返回上一级。 5 .PIR移动侦测:当检测到移动物体时,侦测信号 会触发显示屏启动,显示屏显示室外情况。 6 .低电量提醒:显示器右上角的电池图标:TX图标,对应 的是室外机门铃的电量;R X图标,对应的是室内机显示 器的电量。当电池低电量时,电池图标会变成红色,请 及时充电。 7 .显示器指示灯: 工作状态:指示灯绿灯; 配对模式:指示灯闪烁; 休眠待机:指示灯红灯; 充电状态:红色指示灯常亮,充满电,指示灯熄灭。 1显示屏:根据个人需求,可放客厅,前台,门口置物 柜,等。方便取电的地方,供电是5V用电,用手机充 电器,或者插USB口供电使用。 ② 门铃:木门,玻璃门,清洁好安装位置灰尘,3M胶粘 贴门上即可。铁质门,建议装门把手上端,距离地面 1.5-1.6米高度即可,可以根据个人需求改动。 温馨提示:安装前,先测试一下安装位置门铃和显示屏联 机信号接收是否良好,选信号好的位置安装。 48 用户常见问答 关于接收距离 无障碍环境,视频信号可传输50米左右。如果有实墙,铁门阻挡, 视频信号传输距离和信号强度会出现延缓和距离降低。所以,具体 使用环境,具体分析。如在墙体和有铁质门的使用环境,可以建议 消费者用蓝牙耳机或者其他蓝牙设备测试一下信号接收情况进行判 断。 关于待机时间 1 显示器:内置400毫安电池,主要用途是记忆保存时间和应对 临时断电情况使用。长时间使用,显示屏建议供电使用,使用 5V,1 -2A适配器供电。 2 门铃:内置4000毫安电池,低功耗芯片,以每日10次按门铃计 算,充满电可使用4至6个月左右,门铃是充电使用。 关于对讲干扰 无线门铃对讲是无线信号传输,不同于有线传输,所以会受电磁干 扰。门铃和显示屏越近干扰就会越大,相反,随着距离的增加,干 扰就会越少。建议门铃和显示屏距离在3米外距离使用对讲,对讲 原理可以参考传统的对讲机原理。 关于充电时间/状态 门铃接通视频后,右上角显示门铃和显示器的电量。 RX是显示器的电量,TX是门铃的电量,2A充电器充10小时左右可充 满,充满电充电口指示灯会熄灭。建议不要使用快充,快充对电池 寿命会有一定的影像。 注意:插电状态下,电池格是变化的,代表着通电状态。拔掉电源 后,电池格会停在拔掉电源的那一刻状态,非真实的电量状态,关 机重启后显示器显示的电池格才是真实电量状态。 49 Wireless video doorbell Instruction manual Long press for 3 seconds to wake up the outdoor doorbell and check the situation at the door Kind reminder: If used for a long time, the monitor needs to be powered on. It is recommended to use the standard USB cable of the product to connect 5V, 1-2A USB port for power supply, and can also be connected to the USB port of a mobile phone adapter for power supply. EN 2 1.Doorbell ①Reset button ②Type-C charging port ③Preset TF port ④Photosensitive sensing ⑤Lens ⑥PIR sensor ⑦MIC ⑧LED fill light ⑨Button Preset switch 10 3 ① Indicator light ② Up/+key ③ Down/- key ④ Return key ⑤ Menu key ⑥ Dial key/confirm key ⑦ Power on/off button ⑧ Charging port ⑨ Reset button Card slot Horn Antenna Backplane Support MIC 10 11 12 13 14 15 4 3. Matching doorbell and monitor 1. Find the power button on the monitor, press and hold the M button after turning it on, the monitor will display a pairing prompt, and enter a 30 second countdown. 2. After the display shows the "Pairing * * 30" prompt, press and hold the doorbell button at the same time until the display shows the "Pairing * * √" prompt, indicating successful pairing and connection. Kind reminder: The pairing has been successfully completed at the factory, and there are no special circumstances. Users do not need to pair again on their own. 5 1. 2. 1.1. Long press "M" to enter pairing mode. 1.2. Short press to enter menu selection and settings. 2.1. When a visitor rings the doorbell, the indoor unit (monitor) displays a reminder of the visitor and the ringing. Press the 'dial key' once to connect the intercom. 2.2. After connecting the intercom, the indoor captain can press the "dial button" to talk to the intercom, and the outdoor unit (doorbell) can hear the indoor unit's voice without any operation. 2.3. Press the "dial button" again to hang up, and both the indoor and outdoor units will enter sleep mode simultaneously. Key function: Dial button 4、 Keys and Function Table Icon FunctionIcon Explanation Intercom/hang up/ wake up/confirm Short press to order/ long press to pair Press down/decrease Up key/Add Return Clock Video replay Ringing tone System Settings Nline signal strength Doorbell battery level Monitor battery level Intercom pickup icon TF card icon Pairing in progress Match successful Voice volume of intercom Unparalleled/ doorbell in sleep mode No connection/ please ring the doorbell Connect * * * √ Pairing * * * 30 6 3. 2.4. In sleep mode, long press the "dial button" on the indoor monitor for 3 seconds to wake up the outdoor unit doorbell and check the situation at the outdoor entrance. 2.5. In menu mode, the "dial key" is also the confirm key to confirm settings. 3.1. Directly pressing the "▼" and "▲" keys is to adjust the intercom volume. 3.2. After entering the menu, press the "▼" key to enter the next option or decrease the volume/brightness; Press the "" key to enter the previous option or increase the volume/brightness. The key is the return key, which enters the menu settings interface. Pressing this key will return to the previous level. 4. Menu function: 4.1. Video recording function: This function requires inserting a TF card. It is recommended to format the TF card before use; Ring the doorbell, and the monitor will automatically start recording. Once the recording is full, it will automatically loop over and save the latest recording. Attention: Use 8-32GB, C10 lev…

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

Attestation Statements

LocalRepresentativeLetter ForCertificationServiceintheUSA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoSection2.911(d)(7),oftheCommission’sRules(47C.F.R.)weattestasfollowsfor theproductlistedbelow: FCCIDModelname 2BR43-M28SM28S,M18S,M19S,M20S,M21S Weherebyacknowledgeasfollows: i.bothsigneesconfirmthatthepointofcontactacceptsresponsibilitytoactasaUS- AmericanRepresentativeonbehalfoftheapplicant ii.thepointofcontactprovidesthephysicalU.S.addressandemailaslistedbelow iii.bothpartiesmaintaintherequirementsofthisagreementwithoutexpirationdate US-AmericanPointofContactApplicant/ApprovalHolder SignatureSignature CompanyName:LOBOSIOWAINCDongguanYuaohongTechnology Co.,LTD FRN:00364139610037488699 ContactName:HarleyLiWanhongZou Address:4623BittercreekDrColorado SpringsCO80922US Room902,Building2,No.23, DalingshanSection,Guanchang Road,DalingshanTown, DongguanCity,Guangdong Province Phone:+18188180538-- Email:[email protected]@qq.com

Attestation Statements

CoveredEquipmentAttestationLetter ForCertificationServiceintheUSA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoSection2.911(d)(5)(i)-(ii)oftheCommission’sRules(47C.F.R.)weattestas followsfortheproductlistedbelow: FCCIDModelname 2BR43-M28SM28S,M18S,M19S,M20S,M21S We, Applicant CompanyName:DongguanYuaohongTechnologyCo.,LTD Address:Room902,Building2,No.23,Dalingshan Section,GuanchangRoad,Dalingshan Town,DongguanCity,GuangdongProvince Phone:N/A certifythattheequipmentforwhichauthorizationissoughtisnot“covered”equipment prohibitedfromreceivinganequipmentauthorizationpursuanttosection2.903oftheFCC rules.Thisincludesthecybersecurityandanti-virussoftwareproducedorprovidedby KasperskyLab,Inc.oranyofistsuccessorsandassignees. Wecertifythat,asofthedateofthefilingoftheapplication,theapplicantisnotidentified ontheCoveredListasanentityproducing“covered”equipment. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-6-23 SignatureDate PrintedNameofSignee:WanhongZou Company:DongguanYuaohongTechnology Co.,LTD Phone:N/A Email:[email protected] Address:Room902,Building2,No.23, DalingshanSection,GuanchangRoad, DalingshanTown,DongguanCity, GuangdongProvince Fax:N/A

Cover Letter(s)

Dongguan Yuaohong Technology Co., LTD Room 902, Building 2, No. 23, Dalingshan Section, Guanchang Road, Dalingshan Town, Dongguan City, Guangdong Province Date: 2026-6-23 FCC ID: 2BR43-M28S Model Numbers: M28S, M18S, M19S, M20S, M21S To: Federal Communication Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21048 To Whom It May Concern, We, Dongguan Yuaohong Technology Co., LTD hereby declare that our product (Smart Visual Doorbell)Model Numbers: M28S, M18S, M19S, M20S, M21S, they are electrical identical, the Schematic, PCB layout, internal structure and software are same, the only difference among the series models is the shape of the housing, the materials of housing are all plastic which doesn’t affect the test result. Should you have any questions or comments regarding this matter, please have my best attention. Sincerely, (Signed) Name / Title: Wanhong Zou/ Manager Company: Dongguan Yuaohong Technology Co., LTD Address: Room 902, Building 2, No. 23, Dalingshan Section, Guanchang Road, Dalingshan Town, Dongguan City, Guangdong Province Phone: N/A Fax Number: N/A E-Mail: [email protected]

Cover Letter(s)

ConfidentialityRequestLetter ForCertificationServiceintheUSA FederalCommunicationCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoParagraphs§0.457and0.459oftheCommission’sRules(47C.F.R.)andSection §552(b)(4)oftheFreedomofInformationAct,werequestconfidentialityforthe documentationofthefollowingproducts: FCCIDModelname 2BR43-M28SM28S,M18S,M19S,M20S,M21S Fortheproductslistedabove,werequestpermanentconfidentialityforallapplicable exhibitsasthereare:  theOperationalDescription  theBlockDiagram theSchematics Theabovelistedexhibitscontaintradesecretsandproprietaryinformationthatcouldbeof benefittoourcompetitors. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-6-23 SignatureDate PrintedNameofSignee/Title:WanhongZou/Manager Company:DongguanYuaohongTechnologyCo.,LTD Address:Room902,Building2,No.23,DalingshanSection, GuanchangRoad,DalingshanTown,DongguanCity, GuangdongProvince Phone:-- Fax:-- Email:--

External Photos

ReportNo.:CISRR26061115601 Page 57 of 62 9.EXTERNALANDINTERNALPHOTOS 9.1.ExternalPhotos ReportNo.:CISRR26061115601 Page 58 of 62 ReportNo.:CISRR26061115601 Page 59 of 62

ID Label/Location Info

Size:3 Label 0mm*20mm Smart Visual Doorbell Model No.:M28S FCC ID:2BR43-M28S Label Location

Internal Photos

ReportNo.:CISRR26061115601 Page 60 of 62 9.2.InternalPhotos ReportNo.:CISRR26061115601 Page 61 of 62 ANT

RF Exposure Info

ReportNo.:CISRR26061115602 Reporttemplateversion:CISE-TR-001-A0Page:1of5 TESTREPORT RFExposureEvaluation ReportNo.CISRR26061115602 ProjectNo.CISR260611156 FCCID2BR43-M28S ApplicantDongguanYuaohongTechnologyCo.,Ltd Address Room902,Building2,No.23,DalingshanSection,GuanchangRoad, DalingshanTown,DongguanCity,GuangdongProvince ManufacturerDongguanYuaohongTechnologyCo.,Ltd Address Room902,Building2,No.23,DalingshanSection,GuanchangRoad, DalingshanTown,DongguanCity,GuangdongProvince ProductNameSmartVisualDoorbell Trademark- Model/TypereferenceM28S ListedModel(s)M18S,M19S,M20S,M21S Standard 47CFRPart2.1093 DateofsamplereceiptJune15,2026 TestdateJune15,2026toJune18,2026 IssuedateJune18,2026 TestresultComplied Reviewedby:LucasHuang Approvedby:HansHu Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangceTesting TechnologyCo.,Ltd. ReportNo.:CISRR26061115602 Reporttemplateversion:CISE-TR-001-A0Page:2of5 1.APPLICABLESTANDARD 47CFRPart2.1093:Radiofrequencyradiationexposureevaluation:portabledevices ANSIC95.1–2019:IEEEStandardforSafetyLevelswithRespecttoHumanExposuretoRadioFrequency ElectromagneticFields,3kHzto300GHz. FCCKDBpublication447498D01GeneralRFExposureGuidancev06:MobileandPortableDevicesRF ExposureProceduresandEquipmentAuthorizationPolicies. 47CFRPart1.1307:Actionsthatmayhaveasignificantenvironmentaleffect,forwhichEnvironmental Assessments(EAs)mustbeprepared. 2.REPORTVERSION VersionNo.IssuedateDescription 00June18,2026Original ReportNo.:CISRR26061115602 Reporttemplateversion:CISE-TR-001-A0Page:3of5 3.RADIOSPECIFICATIONDESCRIPTION WIFI-2.4GHzBand Supportedtype:802.11b802.11g802.11n 802.11ax Note:PleaserefertoRFreportfordetailedtechnicalspecifications 4.SIMULTANEOUSTRANSMISSIONANALYSIS ThedeviceuseasingletransmittermoduleandantennaforWIFI,cannottransmitsimultaneously. ReportNo.:CISRR26061115602 Reporttemplateversion:CISE-TR-001-A0Page:4of5 5.TESTRESULT 5.1.Standalonetransmission Limit: KDB447498D01v06,Clause4.3.1a) For100MHzto6GHzandtestseparationdistances≤50mm,the1-gand10-g SARtestexclusionthresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]*[√f(GHz)]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation31The resultisroundedtoonedecimalplaceforcomparison Thevalues3.0and7.5arereferredtoasnumericthresholdsinstepb)below Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50mm, andfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmaccordingto4.1f)isappliedtodetermine SARtestexclusion. Result: Passed TestData Radiotype Frequency (GHz) Maximum output power #1 (dBm) Antenna gain #2 (dBi) Maximum EIRP #3 (dBm) Maximum tune-up EIRP(dBm) Minimum distance (mm) Evaluated value LimitResult 2.4GWIFI2.4725.572.357.929.005.002.49783.00PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. #3:EIRP=Maximumoutputpower+Antennagain. #4:Thisvalueisdeclaredbytheapplicant. ReportNo.:CISRR26061115602 Reporttemplateversion:CISE-TR-001-A0Page:5of5 5.2.Simultaneoustransmission Limit: KDB447498D01v06,Clause4.3.2,47CFRPart1.1307 InthecaseofxedRFsourcesoperatinginthesametime-averagingperiod,orof multiplemobileorportableRFsourceswithinadeviceoperatinginthesametime averagingperiod,ifthesumofthefractionalcontributionstotheapplicablethresholds islessthanorequalto1asindicatedinthefollowingequation. Where a=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(B)ofthissectionforP,includingexistingexempttransmittersandthosebeing added. b=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(C)ofthissectionforThresholdERP,includingexistingexempttransmittersand thosebeingadded. c=numberofexistingfixed,mobile,orportableRFsourceswithknownevaluationforthespeci edminimumdistanceincludingexistingevaluatedtransmitters. P j =theavailablemaximumtime-averagedpowerortheERP,whicheverisgreater,forxed, mobile,orportableRFsourceiatadistancebetween0.5cmand40cm(inclusive). P th,j =theexemptionthresholdpower(P)accordingtoparagraph(b)(3)(i)(B)ofthissectionfor xed,mobile,orportableRFsourcei. ERP j =theERPoffixed,mobile,orportableRFsourcej. ERP th,j =exemptionthresholdERPforfixed,mobile,orportableRFsourcej,atadistanceofat leastλ/2πaccordingtotheapplicableformulaofparagraph(b)(3)(i)(C)ofthissection. Evaluated k =themaximumreportedSARorMPEoffixed,mobile,orportableRFsourcekeither inthedeviceoratthetransmittersitefromanexistingevaluationatthelocationofexposure. ExposureLimit k =eitherthegeneralpopulation/uncontrolledmaximumpermissibleexposure (MPE)orspecicabsorptionrate(SAR)limitforeachxed,mobile,orportableRFsourcek, asapplicablefrom§1.1310ofthischapter. Result:NotApplicable --------EndofReport--------

Test Report

DATE DATE ECN/ECR LEJIN R&D DEPT ENGINEER R&D DEPT APPROVAL Edition/Part number Issued Date: 2026/4/30 CUSTOMER ENGINEER R&D DEPT BUSSINESS DEPTAPPROVED BY Edition/Part number Shenzhen Lejin radio frequency technology Co., LTD The specification data is the sample antenna data. Due to factors such as the product not being glued to the shell, there may be differences between the trial production machine and the specification data. However, after correction with the trial production machine, the data can remain consistent with the specification data Product Model: TX10 Part Number: Write By : Siqi Peng Antenna manufacturer:Shenzhen Lejin radio frequency technology Co., LTD Company Address: 3rd Floor, Building A4, No. 176 Chongqing Road, Fuhai Street, Bao'an District, Shenzhen, Guangdong Province.(Phone number: 13603098741) Customer Name: Product Name: JF01-251112003-R0A 3、 规格(Product Specification) 4、 测试设备(Test Equipment & Conditions) 5、 性能测试报告(Test Report) 6、 天线图片(Antenna Picture ) Shenzhen Lejin radio frequency technology Co., LTD 目 录 Index 1、 封面 (Cover) 2、 目录 (Index) 113B- 50 Test Equipment & Conditions 1. Network Analyzers :Agilent 5071C 2. Communications Test Set:Agilent E5515C/CMW500/AT8826 3. 3D Chamber Test System(ETS743)/STM23+1 BL1.13-1- 20 ̊C ~ + 50 ̊C- 30 ̊C ~ + 80 ̊C Material & Mechanical CharacteristicsEnvironmental Material of Radiator Cable Type Connector Type Dimension Operation Temperature Storage Temperature ≥0DB 2400 MHz ~2500 MHz <1.5>35%50 OhmLinear Shenzhen Lejin radio frequency technology Co., LTD Electrical Characteristics FrequencyVSWREfficiencyImpedancePolarizationGain Freq (MHz)2400241024202430245024602470248024902500 Effi(%)38.4538.137.0635.7738.9640.4937.5636.5737.5939.51 Gain(dBi)22.131.891.571.021.110.970.992.352.74 Antenna Impedance: WIFI ANT M: 2.4G (Wifi/BT ) ANTM Shenzhen Lejin radio frequency technology Co., LTD 由 Autodesk 教育版产品制作 由 Autodesk 教育版产品制作 由 Autodesk 教育版产品制作 由 Autodesk 教育版产品制作

Test Report

ReportNo.:CISRR26061115601 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of53 TESTREPORT ReportNo.CISRR26061115601 ProjectNo.CISR260611156 FCCID2BR43-M28S ApplicantDongguanYuaohongTechnologyCo.,Ltd Address Room902,Building2,No.23,DalingshanSection,GuanchangRoad, DalingshanTown,DongguanCity,GuangdongProvince ManufacturerDongguanYuaohongTechnologyCo.,Ltd Address Room902,Building2,No.23,DalingshanSection,GuanchangRoad, DalingshanTown,DongguanCity,GuangdongProvince ProductNameSmartVisualDoorbell Trademark- Model/TypereferenceM28S ListedModel(s)M18S,M19S,M20S,M21S Standard 47CFRPart15.247 DateofsamplereceiptJune15,2026 TestdateJune15,2026toJune18,2026 IssuedateJune18,2026 TestresultComplied Reviewedby:LucasHuang Approvedby:HansHu ReportNo.:CISRR26061115601 Page 2 of 53 Contents 1.STANDARDANDAPPLICABLETESTMETHODS........................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.TESTDESCRIPTION.......................................................................................................................................4 4.SUMMARY........................................................................................................................................................5 4.1.ProductDescription*..................................................................................................................................5 4.2.RadioSpecificationDescription*..............................................................................................................5 4.3.ModificationofEUT.....................................................................................................................................5 4.4.Deviationfromstandards...........................................................................................................................6 4.5.TestingSite...................................................................................................................................................6 5.TESTCONFIGURATION.................................................................................................................................7 5.1.Testfrequencylist.......................................................................................................................................7 5.2.Descriptionsoftestmode...........................................................................................................................7 5.3.Testsampleinformation.............................................................................................................................7 5.4.Environmentalconditions...........................................................................................................................7 5.5.Statementofthemeasurementuncertainty.............................................................................................7 5.6.EquipmentUsedduringtheTest................................................................................................................8 6.TESTRESULTS.............................................................................................................................................10 6.1.EvaluationResults(Evaluation)...............................................................................................................10 6.1.1.AntennaRequirement............................................................................................................................10 6.2.RadioSpectrumMatterTestResults(RF)...............................................................................................11 6.2.1.ConductedEmissionatACpowerline.................................................................................................11 6.2.2.6dBBandwidth........................................................................................................................................14 6.2.3.MaximumConductedOutputPower.....................................................................................................15 6.2.4.PowerSpectralDensity..........................................................................................................................16 6.2.5.Conductedbandedgeandspuriousemission...................................................................................17 6.2.6.Radiatedbandedgeemission...............................................................................................................18 6.2.7.RadiatedSpuriousEmission(below1GHz).........................................................................................24 6.2.8.RadiatedSpuriousEmission(Above1GHz)........................................................................................28 7.APPENDIXREPORT......................................................................................................................................36 7.1.ConductedPeakOutputPower................................................................................................................36 7.2.PowerSpectralDensity.............................................................................................................................39 7.3.6dBBandwidth...........................................................................................................................................42 7.4.DutyCycle..................................................................................................................................................45 7.5.ConductedSpurious&BandEdgeEmission.........................................................................................48 ReportNo.:CISRR26061115601 Page 3 of 53 1.STANDARDANDAPPLICABLETESTMETHODS Thetest…

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

Test Report

ReportNo.:CISRR26061115601 Page 39 of 53 7.2. PowerSpectralDensity TestResult ModeChannel PSD (dBm/3kHz) Ant.0 Limit (dBm/3kHz) Result IEEE802.11b 1-18.39 ≤8 PASS 6-20.27PASS 11-18.74PASS IEEE802.11g 1-26.09PASS 6-26.16PASS 11-25.75PASS IEEE802.11n_20 1-26.01PASS 6-25.96PASS 11-25.56PASS IEEE802.11n_40 3-27.04PASS 6-30.20PASS 9-26.49PASS TestGraphs IEEE802.11b_Channel1_20MHz_Antenna0IEEE802.11b_Channel6_20MHz_Antenna0 IEEE802.11b_Channel11_20MHz_Antenna0IEEE802.11g_Channel1_20MHz_Antenna0 ReportNo.:CISRR26061115601 Page 40 of 53 IEEE802.11g_Channel6_20MHz_Antenna0IEEE802.11g_Channel11_20MHz_Antenna0 IEEE802.11n_Channel1_20MHz_Antenna0IEEE802.11n_Channel6_20MHz_Antenna0 IEEE802.11n_Channel11_20MHz_Antenna0IEEE802.11n_Channel3_40MHz_Antenna0 ReportNo.:CISRR26061115601 Page 41 of 53 IEEE802.11n_Channel6_40MHz_Antenna0IEEE802.11n_Channel9_40MHz_Antenna0 ReportNo.:CISRR26061115601 Page 42 of 53 7.3. 6dBBandwidth TestResult ModeChannelAnt. Center Frequency (MHz) 6dB Bandwidth (MHz) Limit (MHz) Result IEEE802.11b 1 0 24128.470 ≥0.5 PASS 624379.030PASS 1124629.510PASS IEEE802.11g 1241215.89PASS 6243716.17PASS 11246216.16PASS IEEE 802.11n_20 1241217.03PASS 6243717.24PASS 11246217.36PASS IEEE 802.11n_40 3242231.49PASS 6243735.53PASS 9245230.00PASS TestGraphs IEEE802.11b_Channel1_20MHz_Antenna0IEEE802.11b_Channel6_20MHz_Antenna0 IEEE802.11b_Channel11_20MHz_Antenna0IEEE802.11g_Channel1_20MHz_Antenna0 ReportNo.:CISRR26061115601 Page 43 of 53 IEEE802.11g_Channel6_20MHz_Antenna0IEEE802.11g_Channel11_20MHz_Antenna0 IEEE802.11n_Channel1_20MHz_Antenna0IEEE802.11n_Channel6_20MHz_Antenna0 IEEE802.11n_Channel11_20MHz_Antenna0IEEE802.11n_Channel3_40MHz_Antenna0 ReportNo.:CISRR26061115601 Page 44 of 53 IEEE802.11n_Channel6_40MHz_Antenna0IEEE802.11n_Channel9_40MHz_Antenna0 ReportNo.:CISRR26061115601 Page 45 of 53 7.4. DutyCycle TestResult ModeChannelAntenna OnTime (ms) Period (ms) Duty Cycle(%) Duty Cycle (linear) Duty Cycle Factor (dB) 1/T IEEE 802.11b 1 1 8.3198.34799.660.99660.01480.1202 68.3408.36799.680.99680.01390.1199 118.3408.36799.680.99680.01390.1199 IEEE 802.11g 11.3961.42997.690.97690.10150.7163 62.0682.19594.210.94210.2590.4836 112.0682.19594.210.94210.2590.4836 IEEE 802.11n_20 11.9242.05193.810.93810.27750.5198 61.9242.05193.810.93810.27750.5198 111.9242.05193.810.93810.27750.5198 IEEE 802.11n_40 30.6500.68594.890.94890.22781.5385 60.6500.68495.030.95030.22141.5385 90.6500.68495.030.95030.22141.5385 TestGraphs IEEE802.11b_20MHz_Channel1IEEE802.11b_20MHz_Channel6 IEEE802.11b_20MHz_Channel11IEEE802.11g_20MHz_Channel1 ReportNo.:CISRR26061115601 Page 46 of 53 IEEE802.11g_20MHz_Channel6IEEE802.11g_20MHz_Channel11 IEEE802.11n_20MHz_Channel1IEEE802.11n_20MHz_Channel6 IEEE802.11n_20MHz_Channel11IEEE802.11n_40MHz_Channel3 ReportNo.:CISRR26061115601 Page 47 of 53 IEEE802.11n_40MHz_Channel6IEEE802.11n_40MHz_Channel9 ReportNo.:CISRR26061115601 Page 48 of 53 7.5. ConductedSpurious&BandEdgeEmission TestResult ModeChannelAnt. OOB Emission Frequency (MHz) OOB Emission Level (dBm) Limit (dBm) OverLimit (dB) Result IEEE 802.11b 1 0 2398.14-32.305-25.28-7.025PASS 2400.00-33.150-25.28-7.870PASS 6925.50-38.170-25.28-12.890PASS 6705.44-25.739-25.25-0.489PASS 11 2483.50-34.110-24.51-9.600PASS 6899.66-37.414-24.51-12.904PASS IEEE 802.11g 1 2396.82-41.900-33.01-8.890PASS 2400.00-42.740-33.01-9.730PASS 6893.80-38.732-33.01-5.722PASS 66938.78-38.038-33.56-4.478PASS 11 2387.98-41.997-32.77-9.227PASS 2400.00-44.950-32.77-12.180PASS 22039.0-37.846-32.77-5.076PASS IEEE 802.11n_20 1 2378.76-42.090-33.21-8.880PASS 2400.00-42.670-33.21-9.460PASS 6945.40-37.917-33.21-4.707PASS 622024.0-38.209-33.58-4.629PASS 11 2370.30-41.917-32.82-9.097PASS 2400.00-43.840-32.82-11.020PASS 23344.1-38.821-32.82-6.001PASS IEEE 802.11n_40 3 2345.65-40.880-33.48-7.400PASS 2400.00-43.560-33.48-10.080PASS 6983.70-38.251-33.48-4.771PASS 622052.3-36.969-36.21-0.759PASS 9 2337.56-41.561-33.8-7.761PASS 2400.00-43.150-33.8-9.350PASS 4855.50-37.497-33.8-3.697PASS Note:inputcompensationcoeffcient(dB)=CableLoss(dB) TestGraphs In-BandReferenceLevel IEEE802.11b_Channel1_20MHz_Antenna0 OutOfBandEmission IEEE802.11b_Channel1_20MHz_Antenna0 ReportNo.:CISRR26061115601 Page 49 of 53 30.0MHz-25000.0MHz IEEE802.11b_Channel1_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11b_Channel6_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11b_Channel6_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11b_Channel11_20MHz_Antenna0 OutOfBandEmission IEEE802.11b_Channel11_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11b_Channel11_20MHz_Antenna0 ReportNo.:CISRR26061115601 Page 50 of 53 In-BandReferenceLevel IEEE802.11g_Channel1_20MHz_Antenna0 OutOfBandEmission IEEE802.11g_Channel1_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11g_Channel1_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11g_Channel6_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11g_Channel6_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11g_Channel11_20MHz_Antenna0 ReportNo.:CISRR26061115601 Page 51 of 53 OutOfBandEmission IEEE802.11g_Channel11_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11g_Channel11_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel1_20MHz_Antenna0 OutOfBandEmission IEEE802.11n_Channel1_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11n_Channel1_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel6_20MHz_Antenna0 ReportNo.:CISRR26061115601 Page 52 of 53 30.0MHz-25000.0MHz IEEE802.11n_Channel6_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel11_20MHz_Antenna0 OutOfBandEmission IEEE802.11n_Channel11_20MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11n_Channel11_20MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel3_40MHz_Antenna0 OutOfBandEmission IEEE802.11n_Channel3_40MHz_Antenna0 ReportNo.:CISRR26061115601 Page 53 of 53 30.0MHz-25000.0MHz IEEE802.11n_Channel3_40MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel6_40MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.11n_Channel6_40MHz_Antenna0 In-BandReferenceLevel IEEE802.11n_Channel9_40MHz_Antenna0 OutOfBandEmission IEEE802.11n_Channel9_40MHz_Antenna0 30.0MHz-25000.0MHz IEEE802.…

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

Test Setup Photos

ReportNo.:CISRR26061115601 Page 55 of 62 8.TESTSETUPPHOTOS ConductedEmissionatACpowerline Radiatedbandedgeemission RadiatedSpuriousEmission(Above1GHz) ReportNo.:CISRR26061115601 Page 56 of 62 RadiatedSpuriousEmi…

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

Contact Information

Applicant

Wanhong Zou(Manager)
[email protected]Fax: N/A

Technical Contact

LOBOS IOWA INCHarley Li
[email protected]

4623 Bittercreek Dr Colorado Springs CO 80922 · United States

Test Firm

Shenzhen Bangce Testing Technology Co. , Ltd.Hans Hu
[email protected]

Technical Specifications

#Rule PartsFrequency RangePower Output
115C2.41 GHz - 2.46 GHz3.60 mW
Confidentiality
Long Term
Grant Notes
Power listed is maximum conducted output power. This filing meets the SAR threshold exclusion set forth in KDB 447498 and therefore can be used in mobile/portable configurations. The antenna used for this transmitter must not transmit simultaneously with any other antenna or transmitter, except in accordance with FCC multi-transmitter product procedures. This device supports 20MHz and 40MHz bandwidth modes.

Other Applications from Dongguan Yuaohong Technology Co., LTD

Action camera - FCC ID 2BR43-Q3 - Dongguan Yuaohong Technology Co., LTD
2BR43-Q3

Action camera

Dec 10, 2025

Equipment Class

DTS - Digital Transmission System