C100 OBD2 HUD Head Up Display KM/h MPH Car Speed Projector Mirror        HUD Main Functions:        -Speed(Km/h or MPH),over speed alarm    -RPM, RPM Alarm    -water temperature(°C or °F), high water temperature alarm    -voltage, low voltage alarm    menu or auto adjust the brightness    Please note:  1.Please manually turn off the HUD,when you don't drive your car for more than a week.  2.OBD System Only Compatible With Petrol Car ,Not compatible With Diesel Car Electric Car hybrid vehicle.      Accessories    1*device+1*OBD2 cable, 1*anti-slip mat, 1*User manual                   HUD MAIN FUNCTIONS   Speed alarm/The oil  temperature/Hot oil alarm/Instant voltage/Speed/The mileage                       Short pull up to switch display mode   mode 1: speed  mode 2: Speed + RPM  mode 3: Speed + Water Temperature  mode 4: Speed+ RPM + Water Temperature                       Clear the fault code                Product Introduction:   HUD short for Head Up Display,the main function is to display the car dashboard information (e.g.speed,RPM,water temperature,voltage,trip distance etc ),and keep the driver eyes always on road to avoid the dangerous of lowering down head to read the dashboard.      button function:   turn off/turn on  1.Short Press'<'.  (1)to switch the display mode  (2) to setup menu options  2.Long Press'<'.  Turn off the buzzer and press for 2 seconds to turn on the buzzer again.  3.Short Press'M.  OBD system: to switch voltage, water temperature,vehicle speed during OBD system, enter into menu setting to switch menu options or parameter values.  4.Long press'M'.  to enter into menu settings (see instructions for Menu 1-12) and press 5 seconds to save and exit  5 Short Press'>'.  Switch speed mode,add menu or parameter after entering setting.  6.Long Press'>'.  (1)To confirm all of the LED lights can be worked.  (2)To clear engine fault code.      Restore setting:   Unplug the power supply,long press'M' button and hold until all of the LED lights on.                Product Introduction:   1.Multi function : speed,engine RPM,water temperature,voltage,driving distance  2.Fatigue driving , Engine Error  3.Water temperature icon ,voltage icon  4.Light sensor:HUD can automatically adjust the brightness according to the environment  5.MPH=Speed Mile/hour,KM/H=kilometer/hour, MPH=Mile/hour.            Buyer Show   EASY INSTALLATION   Easy to install,plug and play         Product Features:   1. Geyiren CAR 100% Brand Guarantee  2. Safty driving, Keep your eyes ahead, No need to down your head to see Dashboard while driving  3.Nano-technology to eliminate double reflections, more clarity  4. Easy to Install, Only need connect the HUD with Car OBD port by OBD cable, HUD will display when car engine on / off  5.