Q10 Car HUD Head-up Display GPS Speed Meter 1. It displays driving dates on the front windshield such as speed, RPM, water temperature, voltagesingle driving distance etc on the car front window glass; avoiding drivers unsafely because of watching the instrument while driving. Drivers can read the driving information instantly, and can always keep the best state on the way with HUD. 2. Light sensor: Automatically adjust the brightness according to the environment 3. Over speed alarm setting 4. Multi icons, from left to right are: fatigue driving icon ,engine fault icon, OBD system icon, GPS system Icon 5. Speed unit: MPH=Milehour ,KMH=kilometerhour 6. Decoration icon, can switch to display the RPM or GPS speed in menu 3. 7. Driving direction(compass): it will flash when GPS signal is loading, and stop flashing once the signal is ready.It will display the direction when the speed exceeds 5. N=North, S=South, W=West, E=East, NW= Northwest, SW=Southwest ,SE=southeast, NE=northeast 8. Multi function display area: speed, water temperature, voltage, fuel consumption, altitude, mileage, navigation distance, driving time ,Power test, number of satellites, clock 9. RPM=engine speed, CF=water temperature, V=voltage, LHK=fuel consumption, TRIP=driving mileage, D= navigation speed limit distance, Min=driving time, ASL=altitude, a? = Speed up test, GPS= satellites 10. Navigation Lane: use with the navigation function of mobile app, display the lane of the vehicle 11. Driving Speed 12. Navigation arrow direction: display vehicle navigation direction,need to use with the App.