M3 Auto OBD2 GPS Head-Up Display Auto Electronics HUD Projector Display Digital Car Speedometer Acceories For All CarSpecifications:Wire or Wirele : wireOutput Frequency : 12V-24VProduct Name : head up displayAlarm For Car : Over-speed,Fatigue driving,Low voltageMaterial : Plastic, electronic componetsFunction 1 : Speed(Km/h or MPHFunction 2 : water temperature(C or F)Function 3 : voltageFunction 4 : single mileageFunction 5 : water temperature alarmFunction 6 : voltage alarmFunction 7 : gear shift reminderFunction 8 : overspeed alarmFunction 9 : fatigue driving remindeFunction 10 : engine failure alarmCompatible car : 90% of gasoline carsIncompatible car1 : Diesel car Hybrid carIncompatible car2 : All cars before 2008Incompatible car3 : Lada all seriesIncompatible car4 : All Peugeot carsIncompatible car5 : Truck, busNote OBD2 Version: Compatible for: Cars in OBD2 systemWhen you're ready to place an order, but you don't know whether your car is compatible with the HUD, you can contact with us! We're glad to help you!GPS Version: Compatible all cars. OBD2 Version It works when the car is running, and turn off when the car's ignition is off.OBD2 Display data: Speed, coolant temperature, voltage, mileage, clear faulty code.Alarms: over-speed alarm, high water temperature alarm, low voltage alarm, fault code alarm, fatigue driving alarm.Automatically turn on or off: After the engine is turned off for 30 seconds, the HUD will automatically shut down; when the engine is started, it will automatically display after 5 seconds. Our HUD with a switch, which can be turned on and off manually. If you do not drive for a long time, it is recommended to manually turn off the HUD.OBD2 Version (It is compatible with OBD2 and EOBD system, it supports over-speed alarm.) 1.Multi function: Speed, Water temperature, Voltage2.Short Pre the button ''M''To switch voltage, water temperature,vehicle speed,enter into menu setting to switch menu options or parameter valuesLong Pre the button ''M''To enter into menu settings (see instructions for Menu 1-12) and pre 5 seconds to save and exit3.Short Pre the button ''-''Menu - and parameter value -Long Pre the button ''-''To turn on and off the buzzer(default choice is buzzer on,you can freely choose to turn on or off)4.Engine icon, Water temperature icon5.Voltage icon, Fatigue driving icon6.Light sensor:HUD can automatically adjust the brightne according to the environment7.Speed unit: MPH- mile, KM/H- kilometer8.OBD connection port9.Power switchLong pre for 5s to turn off,again to turn on10.Short Pre the button ''+''Menu + and parameters value +Long Pre the button ''+''Long pre till the screen is all on, and the fault code is eliminated, long pre again to exit GPS Version It is compatible with all cars! And supports over-speed alarm.Product working voltage is 5V, and it is forbidden to use a voltage higher than 5V for power supply. Some vehicles voltage are highter than 5V, it doesn't matter. Our package included a usb cable, you need to plug usb cable in cigarette lighter, and connect it with HUD.Number of search satellites.Compa: N (North) E (East) W (West) S (South).Vehicle speed display,Speed unit: MPH- mile, KM/H- kilometer.Fatigue Driving Alarm: Fatigue driving alarm is 4 hours, user can freely set this time or turn off this alarm, setting time range: 1-8 hours.