Suitable for all kinds of vehicle modification, the use of stepper motor drive pointer, accurate display engine speed, and with the LCD display clear display mileage, with instructions of high precision, repeatability and versatility, reliability and stability, drive And control is relatively simple and so on. Speed odometer using stepper motor drive pointer, accurate display of the engine speed, and with the LCD display clear display mileage Name: GPS Speedometer Materials: stainless steel +nickel-plated plastic Operating Voltage: 12V/24V Connection: Red-Battery(+9-32VDC) Blue-Battery(-) Orange-Backlight(+9-32VDC) Indicating Range: 0-120KM/H; 0-200KM/H Input Signal: GPS signal, with GPS antenna Protection Class: IP67, can work underwater 1m position 1 x GPS Speedometer 1 x Cable 1 x GPS Receiver 1 x Owner s Manual