2BDNH-X50Helmet Bluetooth Headset

X50 USER MANUAL M Helmet Bluetooth Headset Please read this manual carefully before using the product Accessories content Installation steps Main unit*1Steel clip base*1 3M adhesive base*1 2-in-1 microphone*1 1. Large fuzzy Velcro Stick on inner ear grooves 4. Stick the fuzzy side Velcro of the microphone in the appropriate position inside, then install mic 5. Clip the clip - on base to left helmet, right spot 6. Insert the main unit into the base from top to bottom 2. Install the shorter wire in the helmet ear groove on the main unit side 3. Install the headphone speakers respectively M 【1】 M Velcro for Speaker & Mic*4 Type-C charging cable*1 Speaker heightening pad*2 Product manual M For correct insertion, the first line on the headphone plug should be flush with the shell. M Headphone plug has two raised lines. lf visible after inserting into main unit socket,insertion is wrong and headphones won't function. Attention Product Overview Product Specifications Bluetooth Name: X50 Bluetooth Version: 5.3 Charging Voltage: 5V 1A/2A Charging Time: 1-2 Hours Waterproof Rating: IP67 Standby Time: ≤ 300 Hours Working Time: ≤ 35 Hours Battery Capacity: 1000 mAh Charging Port: Type-C Battery Type: Lithium-polymer 3.7v Note: The parameters are laboratory data; Their use in different environments may vary. The product is constantly updated, so functions and images may differ slightly from the physical. Consult the physical product for accurate information. 【2】 M Power on/off Play/Pause Answer/Hang up Switch Prompt Language AI Voice Assistant Restore Factory Settings Rotating Switch Volume up / Volume down Previous track / Next track Turn on/off auto-answer Switch RGB light effects Status Light Bluetooth connected: Red-blue fast flash → blue slow flash Fully charged: Red light turns blue Headphone jack TYPE-C charging port “M” Function Usage Power on/off Press and hold " " for 3s to turn on/off (with power-on/off prompt). (The current battery level is announced automatically on power-on; status light flashes rapidly. Status light turns off when powered off) Press and hold " " for 10s to restart the device. (*Auto power-off if Bluetooth unconnected for 5 mins after startup) Bluetooth Connection After powering on, enable phone Bluetooth, search for and select the device named "X50" to connect. A slow blue flash of the status light indicates successful connection. Song switching / Volume adjustment Song Switching: Rotate the switch left " " once to skip to the next song; Rotate the switch right " " once to skip to the previous song. Volume Control: Rotate and hold the switch left " " to decrease volume; Rotate and hold the switch right " " to increase volume. Play/Pause: Short press " " to play or pause. Incoming Call Press and hold " " for 2s to reject the call; Short press " " to answer/end the call; Double click " " to call back the last dialed contact. Auto Answer for Incoming Calls Auto answer after 3s of ringing. Rotate the switch left " " twice in a row to enable/disable auto answer for incoming calls. (One "beep" prompt = disabled; two "beep-beep" prompts = enabled) 【3】 Prompt Language Switch When the headset is powered on and not connected to Bluetooth: Double click the " " button to switch the prompt language. Connect to Two Phones Simultaneously After powering on: Connect to the first phone’s Bluetooth then disconnect it, connect to the second phone’s Bluetooth (no need to disconnect), then re-enable Bluetooth on the first phone and connect it to complete the setup. Activate AI Voice Assistant Single press the " " button to activate the voice assistant. (Note: When using the voice assistant for the first time, you must allow access to your phone’s content; ignore this if no prompt appears.) RGB Light Effect Switch & Off (Default Open) Rotate the switch right " " twice in a row to switch RGB light effects (flowing light → blue → red → green → single color cycle → off). Status Indicator Light When charging: The " " button lights up red; turns blue when fully charged. After power-on: The " " button flashes red and blue quickly; turns off when powered off; flashes blue slowly once Bluetooth connection is successful. Factory Reset Press and hold the " " button for 5s to reset to factory settings and clear all Bluetooth pairing records. 1. Do not expose to high temperatures (contains a lithium battery). 2. Charge using a rated-voltage power source. 3. Secure the main unit to prevent damage from dropping. 4. Keep the waterproof/dustproof cover closed. 5. Do not disassemble/modify (no serviceable components). 6. For long-term storage: Keep dry; charge monthly; avoid extreme temps/dust. M M M M Warnings & Precautions 【4】 FCC Caution: This device complies 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 received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: 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 installed 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 reception, 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 separati…

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LocalRepresentativeLetter ForCertificationServiceintheUSA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoSection2.911(d)(7),oftheCommission’sRules(47C.F.R.)weattestasfollowsfor theproductlistedbelow: FCCIDModelname 2BDNH-X50X50,X50PRO,X50Plus,X50promax Weherebyacknowledgeasfollows: i.bothsigneesconfirmthatthepointofcontactacceptsresponsibilitytoactasaUS- AmericanRepresentativeonbehalfoftheapplicant ii.thepointofcontactprovidesthephysicalU.S.addressandemailaslistedbelow iii.bothpartiesmaintaintherequirementsofthisagreementwithoutexpirationdate US-AmericanPointofContactApplicant/ApprovalHolder SignatureSignature CompanyName:LOBOSIOWAINCShenzhenYunyueElectronic TechnologyCo.,Ltd. FRN:00364139610034499269 ContactName:HarleyLiHaipengXu Address:4623BittercreekDrColorado SpringsCO80922US Room302,BuildingB2,Songfa IndustrialPark,No.26,Hexiu WestRoad,Zhancheng Community,FuhaiSub- district,Bao'anDistrict,Shenzhen City Phone:+18188180538N/A Email:[email protected]@qq.com

CoveredEquipmentAttestationLetter ForCertificationServiceintheUSA FederalCommunicationsCommission EquipmentAuthorizationDivision,ApplicationProcessingBranch 7435OaklandMillsRoad Columbia,MD21048 Towhomitmayconcern PursuanttoSection2.911(d)(5)(i)-(ii)oftheCommission’sRules(47C.F.R.)weattestas followsfortheproductlistedbelow: FCCIDModelname 2BDNH-X50X50,X50PRO,X50Plus,X50promax We, Applicant CompanyName:ShenzhenYunyueElectronicTechnology Co.,Ltd. Address:Room302,BuildingB2,SongfaIndustrial Park,No.26,HexiuWestRoad, ZhanchengCommunity,FuhaiSub-district, Bao'anDistrict,ShenzhenCity Phone:N/A certifythattheequipmentforwhichauthorizationissoughtisnot“covered”equipment prohibitedfromreceivinganequipmentauthorizationpursuanttosection2.903oftheFCC rules.Thisincludesthecybersecurityandanti-virussoftwareproducedorprovidedby KasperskyLab,Inc.oranyofistsuccessorsandassignees. Wecertifythat,asofthedateofthefilingoftheapplication,theapplicantisnotidentified ontheCoveredListasanentityproducing“covered”equipment. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-02-24 SignatureDate PrintedNameofSignee:HaipengXu Company:ShenzhenYunyueElectronic TechnologyCo.,Ltd. Phone:+8615089610825 Email:[email protected] Address:Room302,BuildingB2,Songfa IndustrialPark,No.26,HexiuWestRoad, ZhanchengCommunity,FuhaiSub-district, Bao'anDistrict,ShenzhenCity Fax:N/A

ShenzhenYunyueElectronicTechnologyCo.,Ltd. Room302,BuildingB2,SongfaIndustrialPark,No.26,HexiuWestRoad,Zhancheng Community,FuhaiSub-district,Bao'anDistrict,ShenzhenCity Date:2026-02-24 FCCID:2BDNH-X50 ModelNumber:X50,X50PRO,X50Plus,X50promax To:FederalCommunicationCommission AuthorizationandEvaluationDivision7435OaklandMillsRoad Columbia,MD21048 ToWhomItMayConcern, We,ShenzhenYunyueElectronicTechnologyCo.,Ltd.herebydeclarethatourproduct (WirelessDoorbell ) ModelNumber:X50,X50PRO,X50Plus,X50promaxelectricalidentical, theSchematic,PCBlayout,structureandsoftwarearesame,thedifferencebetween differentmodelsisthatinthisapplication,duetodifferentsaleschannelsanddifferent modelnames,thedifferencesinthesameproductmodeldonotsafetyperformanceand electromagneticaffectthecompatibilityperformanceoftheproduct.. Shouldyouhaveanyquestionsorcommentsregardingthismatter,pleasehave mybestattention. Sincerely, (Signed) Name/Title:HaipengXu/Manager Company:ShenzhenYunyueElectronicTechnologyCo.,Ltd. Address:Room302,BuildingB2,SongfaIndustrialPark,No.26,HexiuWestRoad, ZhanchengCommunity,FuhaiSub-district,Bao'anDistrict,ShenzhenCity Phone:+8615089610825 FaxNumber:N/A E-Mail:[email protected]

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 2BDNH-X50X50,X50PRO,X50Plus,X50promax Fortheproductslistedabove,werequestpermanentconfidentialityforallapplicable exhibitsasthereare:  theOperationalDescription  theBlockDiagram theSchematics Theabovelistedexhibitscontaintradesecretsandproprietaryinformationthatcouldbeof benefittoourcompetitors. Ifyouhaveanyquestions,pleasefeelfreetocontactusattheaddressshownbelow. Sincerely, 2026-02-24 SignatureDate PrintedNameofSignee/Title:HaipengXu/Manager Company:ShenzhenYunyueElectronicTechnologyCo.,Ltd. Address:Room302,BuildingB2,SongfaIndustrialPark,No.26, HexiuWestRoad,ZhanchengCommunity,FuhaiSub- district,Bao'anDistrict,ShenzhenCity Phone:+8615089610825 Fax:-- Email:[email protected]

ReportNo.:CISRR26012828601 Page 59 of 62 9.EXTERNALANDINTERNALPHOTOS 9.1.ExternalPhotos ReportNo.:CISRR26012828601 Page 60 of 62

Label Size:10mm*10mm FCC ID:2BDNH-X50 Label Location

ReportNo.:CISRR26012828601 Page 61 of 62 9.2.InternalPhotos ReportNo.:CISRR26012828601 Page 62 of 62 ------Endofthereport----- ANT

ReportNo.: CISRR26012828602 Reporttemplateversion:CISE-TR-001-A0Page:1of6 TESTREPORT RFExposureEvaluation ReportNo.: CISRR26012828602 ProjectNo.: CISR260128286 FCCID:2BDNH-X50 Applicant:ShenzhenYunyueElectronicTechnologyCo.,Ltd. Address: Room302,BuildingB2,SongfaIndustrialPark,No.26,HexiuWestRoad, ZhanchengCommunity,FuhaiSub-district,Bao'anDistrict,ShenzhenCity Manufacturer: ShenzhenYunyueElectronicTechnologyCo.,Ltd. Address: Room302,BuildingB2,SongfaIndustrialPark,No.26,HexiuWestRoad, ZhanchengCommunity,FuhaiSub-district,Bao'anDistrict,ShenzhenCity ProductName: HelmetBluetoothHeadset TradeMark:- Model/Typereference:X50 ListedModel(s):X50PRO,X50Plus,X50promax Standard:47CFRPart2.1093 Issuedate:February5,2026 Testresult:Complied Reviewedby:LucasHuang Approvedby:HansHu Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangceTesting TechnologyCo.,Ltd. ReportNo.: CISRR26012828602 Reporttemplateversion:CISE-TR-001-A0Page:2of6 Contents 1.APPLICABLESTANDARD..............................................................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.RADIOSPECIFICATIONDESCRIPTION........................................................................................................4 4.SIMULTANEOUSTRANSMISSIONANALYSIS.............................................................................................4 5.TESTRESULT.................................................................................................................................................5 5.1.STANDALONETRANSMISSION.................................................................................................................5 5.2.SIMULTANEOUSTRANSMISSION.............................................................................................................6 ReportNo.: CISRR26012828602 Reporttemplateversion:CISE-TR-001-A0Page:3of6 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 00February5,2026Original ReportNo.: CISRR26012828602 Reporttemplateversion:CISE-TR-001-A0Page:4of6 3.RADIOSPECIFICATIONDESCRIPTION Bluetooth Supportedtype:BREDRLE-1Mbps LE-2Mbps Note:PleaserefertoRFreportfordetailedtechnicalspecifications 4.SIMULTANEOUSTRANSMISSIONANALYSIS ThesedevicesuseasingletransmittermoduleandantennaforbothBT,BTcannottransmitsimultaneously. ReportNo.: CISRR26012828602 Reporttemplateversion:CISE-TR-001-A0Page:5of6 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 #4 (dBm) Minimum distance (mm) Evaluated value LimitResult Bluetooth2.4412.7635.766.005.001.24403.00PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. #3:EIRP=Maximumoutputpower+Antennagain. #4:Thisvalueisdeclaredbytheapplicant. ReportNo.: CISRR26012828602 Reporttemplateversion:CISE-TR-001-A0Page:6of6 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. Re…

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深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD No. 412, Building 7, Phase 2, Nanhai Cloud Valley Innovation Park, Pingshan Road 2, Taoyuan Subdistrict, Nanshan District, Shenzhen City Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 1 OF 12 3.2X1.6X0.4 (mm)Bluetooth Ceramic Chip Antenna (YF300B-1 Engineering Specification Product Number 6 5 4 3 2 1 10 2G45 P Y1 3216 YF 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 2 OF 12 2. Features *Stable and reliable in performances *Low temperature coefficient of frequency *Low profile, compact size *RoHS compliance *SMT processes compatible 3. Applications *Bluetooth earphone systems *Hand-held devices when WiFi /Bluetooth functions are needed, e.g., Smart phone. *IEEE802.11 b/g/n *ZigBee *Wireless PCMCIA cards or USB dongle 4. Description Yingfeng chip antenna series are specially designed for WiFi/Bluetooth applications. Based on yingfeng proprietary design and processes, this chip antenna has excellent stability and sensitivity to consistently provide high signal reception efficiency. 5. Electrical Specifications (80 x 40 mm 2 ground plane) 5-1. Electrical Table Characteristics Specifications Unit Outline Dimensions 3.2x1.6x0.4 mm Working Frequency 2400~2500 MHz VSWR 2 Max. Impedance 50  Polarization Linear Polarization Gain Peak 3.0(typical) dBi Efficiency 78 (typical) % 5-2. Return Loss & VSWR 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 3 OF 12 Return Loss (S 11 ) VSWR(S 11 ) 6. Antenna Dimensions & Test Board (unit: mm) a. Antenna Dimensions 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 4 OF 12 b. Test Board with Antenna 80 40 Unit: mm 7. Radiation Pattern (80 x 40 mm 2 ground plane) 7-1. 3D Gain Pattern @ 2442 MHz Z X Y 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 5 OF 12 7-2. 3D Efficiency Table Frequency( MHz) 2400 2410 2420 2430 2442 2450 2460 2470 2480 2490 2500 Efficiency (dB) -1.4 -1.0 -0.9 -0.7 -0.7 -0.8 -0.9 -1.1 -1.2 -1.3 -1.4 Efficiency (%) 72.8 73.7 74.3 74.4 75.5 75.0 74.0 73.6 73.1 72.6 71.5 Gain (dBi) 2.1 2.2 2.3 2.4 2.5 2.5 2.4 1.8 1.7 1.6 1.4 Y X Z Y X X Y Z 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 6 OF 12 7-3. 3D Efficiency vs. Frequency 8. Layout Guide a. Solder Land Pattern: Land pattern for soldering (gray marking areas) is as shown below. Depending on Customer’s requirement, matching circuit as shown below is also recommended. Efficiency vs. Frequency 50 60 70 80 90 100 2400 2410 2420 2430 2442 2450 2460 2470 2480 2490 2500 Frequency(MHz) Efficiency(%) 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 7 OF 12 Top View Bottom View Unit： mm 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 8 OF 12 9. Frequency tuning a. Chip antenna tuning scenario： b. Matching circuit：(Center frequency is about 2442 MHz @ 80 x 40 mm 2 ground plane) System Matching Circuit Component Location Description Vendor Toleranc e 1 1.2 pF* Murata (0402) ±0.1 pF 2 10PF* Murata(0402) ±0.5 PF 3 N/A* - - Fine tuning element 4 1.5 pF* Murata (0402) ±0.1 pF *Typical reference values which may need to be changed when circuit boards or part vendors are different. Matching circuit Feed 4. Fine tuning elemet 1 2 3 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 9 OF 12 c. Fine tuning element vs. Center frequency 10. Soldering Conditions a. Typical Soldering Profile for Lead-free Process Time 60-180s 60-150s 20- Pre- 150-200° 217°C 260° Temperature (°C) 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 10 OF 12 11. Packing (1) Quantity/Reel: 5000 pcs/Reel (2) Plastic tape: 深圳市迎丰天线技术有限公司 SHEN ZHEN YINGFENG ANTENNA TECHNOLOYCO.,LTD Prepared by : JIEXI Designed by : Jason Checked by : Jason Approved by：MR.FANG TITLE：3.2 x 1.6x 0.4(mm) WiFi/Bluetooth Ceramic Chip Antenna (YF300B-1) Engineering Specification DOCUMENT YF3216Y1P2G4501 REV. NO. C PAGE 11 OF 12 深圳市迎丰…

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ReportNo.:CISRR26012828601 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of55 TESTREPORT ReportNo.CISRR26012828601 ProjectNo.CISR260128286 FCCID2BDNH-X50 ApplicantShenzhenYunyueElectronicTechnologyCo.,Ltd. Address Room302,BuildingB2,SongfaIndustrialPark,No.26,HexiuWestRoad, ZhanchengCommunity,FuhaiSub-district,Bao'anDistrict,Shenzhen City ManufacturerShenzhenYunyueElectronicTechnologyCo.,Ltd. Address Room302,BuildingB2,SongfaIndustrialPark,No.26,HexiuWestRoad, ZhanchengCommunity,FuhaiSub-district,Bao'anDistrict,Shenzhen City ProductNameHelmetBluetoothHeadset Trademark- Model/TypereferenceX50 ListedModel(s)X50PRO,X50Plus,X50promax Standard 47CFRPart15.247 DateofsamplereceiptJanuary29,2026 TestdateJanuary29,2026toFebruary3,2026 IssuedateFebruary5,2026 TestresultComplied Reviewedby:LucasHuang Approvedby:HansHu ReportNo.:CISRR26012828601 Page 2 of 55 Contents 1.STANDARDANDAPPLICABLETESTMETHODS........................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.TESTDESCRIPTION.......................................................................................................................................4 4.SUMMARY........................................................................................................................................................5 4.1.ProductDescription*..................................................................................................................................5 4.2.RadioSpecificationDescription*..............................................................................................................5 4.3.ModificationofEUT.....................................................................................................................................6 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 6.2.2.20dBBandwidth......................................................................................................................................14 6.2.3.MaximumConductedOutputPower.....................................................................................................16 6.2.4.ChannelSeparation................................................................................................................................17 6.2.5.NumberofHoppingFrequencies..........................................................................................................18 6.2.6.DwellTime...............................................................................................................................................19 6.2.7.Conductedbandedgeandspuriousemission...................................................................................21 6.2.8.Radiatedbandedgeemission...............................................................................................................23 6.2.9.RadiatedSpuriousEmission(below1GHz).........................................................................................29 6.2.10.RadiatedSpuriousEmission(Above1GHz)......................................................................................33 7.APPENDIXREPORT......................................................................................................................................41 7.1.ConductedOutputPower.........................................................................................................................41 7.2.20dBBandwidth.........................................................................................................................................43 7.3.NumberOfHoppingChannel.............................................................................................................…

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ReportNo.:CISRR26012828601 Page 57 of 62 8.TESTSETUPPHOTOS ConductedEmissionatACpowerline Radiatedbandedgeemission RadiatedSpuriousEmission(Above1GHz) ReportNo.:CISRR26012828601 Page 58 of 62 RadiatedSpuriousEmission(below1GHz)