GEYIREN M1 Auto HUD OBD2 GPS Head-Up Display Electronics Projector Digital Car Speedometer Accessories For All CarWeiying M1 Auto HUD OBD2 GPS Head-Up Display Car Projector Display Digital Speedometer For All Cars Speeding AlarmIt will automatically alarm if overspeed, so it can save you from looking down the speedometer and drive safely.You can freely set this value. Setting Speed range: 30-199KM/H. (The device default alarm speed is 150km/h) 2 Versions DifferentOBD2 Version: Compatiblewith OBD2 systemGPS Version: Compatible with all vehicles.OBD VERSION (Model M3)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 exit3.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 GPS VERSION (Model M1)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 HUD will synchronize the data of dashboardThe driver will easy to know the data of the vehicle at all times Using a reflective filmpls using a reflective film if you meet double images,such as fillowing photoBrightness SensorHUD is still brightness even at night or strong light conditions.and its also can automatically adjust by environmentMulti-functions DisplayCompany profile: Geyiren, establishe in 2013, has been focusing on the R&D and production of HUD for 10 years. Now there are more than 100 HUD products.