Collecting real time speed from GPS satellites Driving time and distance calculation and display Display MPH or KM/h - Simple push button set up Auto adjust brightness through sensor for day & night-time driving Over-speed warning: 3-second alarm beep and display flash will warn driver 93 beeps for over speeding alert) Universal:fit for all cars, trucks, bikes, & motorcycles. Function: 1. Atmosphere decorative lights 2. Acceleration time 3. Driving angle 4. Driving distance 5. Compass 6. Vehicle speed display area 7. Overspeed alarm 8. Fatigue driving alarm 9. Calendar 10. Altitude 11. Travel time 12. Time 13. MPH miles - KM/H kilometers Colour:As Shown Material:ABS Package Contents: 1 * Car heads-up display Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.