GEYIREN M1 Auto HUD OBD2 GPS Head-Up Display Electronics Projector Digital Car Speedometer Acceories For All Car Weiying M1 Auto HUD OBD2 GPS Head-Up Display Car Projector Display Digital Speedometer For All Car Speeding Alarm It 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 Different OBD2 Version: Compatiblewith OBD2 systemGPS Version: Compatible with all vehicles. OBD VERSION (Model M3) OBD2 And EOBD Head-up Display, It supports over-speed alarm1.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 exit 3.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 (Model M1) It supports all cars! It supports over-speed alarm!GPS Head-up Display1.Satellite icon: After the satellite is found, it stops flashing and goes out before it can be used normally2.Light sensor: HUD can automatically adjust the brightne according to the environment3.Short Pre the button "M"To switch vehicle speed, satellite number, enter into menu setting to switch menu options or parameter valuesLong Pre the button "M"To enter into menu settings (see instructions for Menu 1-6) and pre 5 seconds to save and exit HUD will synchronize the data of dashboard The driver will easy to know the data of the vehicle at all time Using a reflective film pls using a reflective film if you meet double images,such as fillowing photo Brightne Sensor HUD is still brightne even at night or strong light conditions.and its also can automatically adjust by environment Multi-functions Display Company 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. Our products have paed CE, FCC, ROHS certification, please rest aured to buy. Both OEM and ODM custom orders can be done. Help you build your own brand. Please