Digital GPS Speedometer, Odometer, 4.7-inch LCD HUD with Overspeed Alarm for All 5-24V Vehicles

Function:1.HD screen, automatic dimming, automatic dimming by default.Or press the button to adjust the screen brightness.2.Alarm function, safe driving, overspeed alarm function.3.Compatible with multiple vehicles, USB (5-24V) can be used.4.Accurate GPS positioning, real-time synchronous data display, satellite data acquisition unaffected by weather.5.