Digital speedometer for cars with overspeed alert and MPH displayMULTIFUNCTION GPS SPEEDOMETER: The car HUD displays speedometer, clock, number of satellites, direction of travel and other information in your driving .<br> You can safely driving information without taking your eyes off the front OVERSPEED CAR ALARM: Additional instrumentation with speeding and fatigue driving alarms make your driving and more comfortable WITH COMPASS: Features a GPS navigation direction compass to help drivers by indicating directions.<br> Equipped with a light sensor adjusts brightness according to different light, it is very clear in light SIMPLE INSTALLATION: Just mount the device near the dashboard or use the 360-degree rotating suction cup mount to mount the device to the windshield, USB cable link, plug and play WORKS FOR ALL VEHICLES: Compatible with all , truck, motorcycle, golf cart.<br> Auto power on/off function, the HUD will or turn off automatically with vehicle ignition, can effectively your vehicle's battery color:Black (green light) Material:plastic Package Contents: 1 x Car for Only the above package content, other are not included.<br> Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing.<br> The measurement allowed error is +/- 1-3cm.