3" Car Digital GPS Speedometer Head Up Display Overspeed MPH/KM/H Warning Alarm Car GPS Speedometer Head Up Display Features Safer and Easier Driving: The visual time from the main direction is reduced by 99%, and slight eye movement Car GPS Speedometer Head Up Display can capture the speed information. Car GPS Speedometer Head Up Display Reduce the frequency of line-of-sight adjustment, adjust the intensity of the eyeball direction, and Car GPS Speedometer Head Up Display reduce eye fatigue Clearer Display: Under strong sun light or at night, you can choose different installation positions and clearly display the speed value. The speed information is publicized, Car GPS Speedometer Head Up Display improves driving safety and comfort; Car GPS Speedometer Head Up Display suitable for taxi and special cars. Under strong sun light, the Car GPS Speedometer Head Up Display speed display brightness will automatically increase. Under low light, the speed display brightness will automatically reduce Overspeed alarm and Fatigue Driving Alarm: Car GPS Speedometer Head Up Display Can set different alarm speed values. Every 1 hour of continuous driving, it will alarm 1 time. Mileage and Driving Time: The car will automatically display the current mileage, the current driving time and the total mileage. Altitude and local time display Other Functions: Car GPS Speedometer Head Up Display Acquire speed data from satellite-accurate, timely, and authoritative. Unit of Measure Switching-Quickly switch speed measurement units (KM/H and MPH) to meet the needs of different areas. Car GPS Speedometer Head Up Display Specification: Type : GPS Speedometer Car GPS Speedometer Head Up Display Material : ABS+PC Car GPS Speedometer Head Up Display Screen Size : 3.0 inch Car GPS Speedometer Head Up Display Satellite Positioning Speed : 1 to 3 Minutes in open space; no satellite signal when indoor. (rainy days affect satellite positioning speed) Package Includes 1 X Car GPS Speedometer Head Up Display 1 X USB Cable 1 X Installing Accessories Set 1 X Manual