WYING M3 Auto OBD2 GPS Head-Up Display Car Electronics HUD Projector Display Digital Car Speedometer Accessories For All Cars OBD2 And EOBD Head-up Display, It supports over-speed alarm 1.Multi function: Speed, Water temperature, Voltage 2.Short Press the button "M" To switch voltage, water temperature,vehicle speed,enter into menu setting to switch menu options or parameter values Long Press the button "M" To enter into menu settings (see instructions for Menu 1-12) and press 5 seconds to save and exit 3.Short Press the button "-" Menu - and parameter value - Long Press 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 icon 5.Voltage icon, Fatigue driving icon 6.Light sensor:HUD can automatically adjust the brightness according to the environment 7.Speed unit: MPH- mile, KM/H- kilometer 8.OBD connection port 9.Power switch Long press for 5s to turn off,again to turn on 10.Short Press the button "+" Menu + and parameters value + Long Press the button "+" Long press till the screen is all on, and the fault code is eliminated, long press again to exit It supports all cars! It supports over-speed alarm! GPS Head-up Display 1.Satellite icon: After the satellite is found, it stops flashing and goes out before it can be used normally 2.Light sensor: HUD can automatically adjust the brightness according to the environment 3.Short Press the button "M" To switch vehicle speed, satellite number, enter into menu setting to switch menu options or parameter values Long Press the button "M" To enter into menu settings (see instructions for Menu 1-6) and press 5 seconds to save and exit 4.Short Press the button "-" After entering the settings, Menu - and parameter value - Long Press the button "-" To turn on and off the buzzer (default choice is buzzer on,you can freely choose to turn on or off) 5.Buzzer6.Compass: N (North) E (East) W (West) S (South) 7.Vehicle speed display: display the current vehicle speed 8.Speed unit: MPH- mile, KM/H- kilometer 9.OBD connection port 10.Power switch Long press for 5s to turn off, again to turn on11.Short Press the button "+" After entering the settings, Menu + and parameters value + Long Press the button "+" The screen is all on, and the fault code is eliminated, long press again to exit Product Size Screen Size: 3.2 inches Display Type: WindshieldProjectorDimension: 8.6x3.7x1.6cm Suitable for: OBD2 EUOBD and GPS Cars Rated Power: 87.5-108mHZ Wire: 16-pin OBD cable or GPS USB Cable Package List: 1 x HUD 1 x Manual 1 x OBD Cable or GPS USB Cable 1 x Reflective film 1 x3M Sticker Please Note: OBD system is suitable for most cars after 2007 OBD2 model can work for OBD2 gasoline vehicles produced after 2004 in USA, and OBD2 gasoline vehicles produced after 2008 in other countries. OBD2 model is not applicable for the following cars: