C3060 Main Functions:GPS speedometer: collecting real time speed from GPS satellites.8.0inch for C3060,big screen size and green font display make more easily and comfortable to read.Compass display, compass will not be affected by geomagnetism, driving direction is the compass direction.Driving time and distance calculation and display.Local time display with auto timezone adjustment.Total mileage calculation and display when car stops.Car battery voltage display, to know your car battery health anytime & anywhere.Plug & play: Power (12-24V) through vehicle cigar outlet, no professional installation is required.Display MPH or KM/h - Simple push button set up.Auto adjust brightness through sensor for day & night-time driving.Over-speed and Fatigue driving warning.Universal: compatible with all cars& trucks.