M3 Auto HUD OBD2 Head Up Display Projection on Glass Car Speed Windshield Projector Speedometer Alarm Electronic Accessories Production Review:HUD short for Head Up Display.It displays driving datas on the front windshield such as speed,RPM,fuel consumption,water temperature,voltage on the car front window glass ;avoiding drivers unsafety because of watching the instrument while driving.Drivers can read the driving information instantly , and can always keep the best state on the way with HUD.A variety of operating interface modes and colors can be switched freely, It will bring more fun and Technological sense to you.Display information vehicle speed, water temperature, voltage, mileage per trip......Alarm: overspeed alarm, water temperature alarm, voltage alarm, fatigue driving reminder, failure alarm.......Product Highlights:1: Automatic adaptation models, in line with OBDII or EUOBD models Plug Ready to use (car auto diagnostic system)2: 3.5"'" L Screen, Windshield Projector, Small but nice3: Speed Unit KM/H & MPH Switch freely4: Auto adjust brightness through sensor for day & night-time driving5: Model design:New tooling design with Sunshine Hood6: 4 different functions to match freelyChoose your favorite combination7: Besides the device can work well on OBDII EUOBD standard cars, it can also supports some new hybrid & automatic start / stop cars8: Accept customization with different MOW Limit: Add Start-up Screen with your logo; Customize Package; Add new functions and display interfaces...M3 photo: Can display high speed 4 different functions to match freelyChoose your favorite combination 5 alarm function remindersFlexible brightness adjustment. automatic and manual brightness adjustment mode, not dazzling Accessories:1* HUD body,1* OBD cable1* anti-slip mat,1* reflection film1* English ManualOBD2workingmodearenotcompatiblewithfollowvehicles: 1.Almost98% carsbeforetheyear2004 ( the year 2004 included) 2.Some Old Oilandelectricitymixing,dieselpoweredcar,Pickup,SUV,ORV,MiniBus... 3. Few Special CarsIfnotsure,pleasecontactusinadvance. WARRANTY@SERVICE 3-YEAR WARRANTY For damage caused by non-human factors, free reissue within 3 years.