1、Multifunctions: speed, RPM, water temperature, voltage, fuel consumption，engine speed, driven distance display. 2、Alarm: overspeed alarm (single-stage alarm/four-stage alarm), excessive water temperature alarm, fatigue driving reminder, over-low voltage alarm, speed alarm, fault code detection, fault code elimination. 3、3.8-inch large-screen metal nanotechnology. The front adopts metal nanotechnology to eliminate unnecessary reflections and make the picture more clear. 4、Automatic brightness adjustment. Strong light makes it pretty clear in the sunny day,rainy day. 5、GPS system: GPS flashing is in the state of searching for stars. Please move the car to an open road. After the satellite is found, the GPS light stops flashing and stays on for normal use. 6、PC material, high and low temperature resistance.