4.5 Inch Car Digital GPS Speedometer Head-up Display Overspeed Altitude Time MPH KM/H Warning Alarm

Feature:  1.Head-up display the diving speed.  2.Driving time and mileage calculation and display.  3.Over-speed alarm.  4.Fatigue driving alarm.  5.Altitude display.  6.Local time display with auto timezone adjustment.  7.Large size screen.  8.Easy setup-Plug&Play-power through vehicle cigarettes lighter.No professional installation is required.  9.Compatible with all cars / trucks.Use GPS signal guided calculation.No wiring needed to the VSS(vehicle speed signal).  10.Display MPH or KM/h.  11.Auto adjust brightness through sensor for Day&Night driving.  12.Green color data display,easy on your eyes.  13.Total mileage flashing display while no GPS signal or car stops.  Specification:  Product Name: Car HUD GPS Speedometer.  Material: ABS+PC.  Color: Black.  Size: 105mmx18mmx60mm (LxWxH).  Input Voltage: DV 5V.  Input Current: DC 50-120mA.  Working Temperature: -30-80℃.    Data display: 1.Signal driving mileage: In the case of continuous power supply, the driving mileage is