X3 5.5inch Car HUD Head Up Display with bluetooth Function OBD2 Interface PlugThisHUDbuiltinELM327andwithbluetoothversionfunction.NotonlyyoucanusetheHUDtoreadalltheinformationonwindowscreen,butalsoyoucandownloadOBDAPPfromAndroidphonetoreadmoreinformation.Themethodsarebelow:1.DownloadOBDAppfromphone2.Openbluetoothofphonetoscan,whendisplayHUDbluetooth,clickconnect.Thepasswordis12343.OpenOBDApp,clicksettingandadaptertoconnect4.Whenfinishconnection,backtoOBDAPPinterfacetoreadmoreinformation.Feature:1.Plugandplay.HUDcanautomaticallyadapttovehicletypewhichinlinewithOBDIIorEUOBD(On-BoardDiagnosticSystem).2.Comprehensivedisplay.HUDcandisplaymanyparametersatthesametimeasfollows,vehiclespeed,enginespeed,watertemperature(voltage,throttlevalveposition,ignitionadvanceangle,timeof100kmacceleration),fuelconsumption,mileage,lowfueltips,enginefailure.3.Threedisplaymode.Drivercanchosenormaldisplaymode,high-speeddisplaymodeandautomaticdisplaymode.4.Freeswitch.Kmandmilecanbeswitchedfreely.5.Suitablesize.Thedisplayareais5.5incheswhichisveryclearfordrivertoreaddata.6.Automaticpoweronandoff.Startingwiththevehiclestarting,stoppingwiththevehiclestoppingtoprotectthevehiclesbattery.Moreover,HUDcanalsopoweronandpoweroffbymanual,whichismoreeasytocontrolHUD.7.Flexiblealarmmode.HUDcanoffersingle-stageandfour-stageoverspeedalarmmodestochoosetomakedrivingsafer.8.Enginespeedalarm.Itcontributestoshiftgearintimetosavefuelalsohassignificancetonewdriver.9.Flexiblebrightnessadjustment.Thebrightnesscanbeadjustedaut