This GPS speedometer odometer features a 4.7 inch LCD display, automatic dimming, and an over speeding alarm function. It is compatible with multiple vehicles and has a USB power supply. The device also displays speed, altitude, humidity, voltage, mileage statistics, date, time, compass, and temperature. It has a GPS precise positioning and real-time synchronous display of data, and is not affected by weather. The package includes a display, USB cable, instructions, and a sticker.