Features： 1、Double Protection: Curved glass and high transparent PC material, to prevent mist from entering the instrument, to avoid fog on the glass surface resulting in unable to see the instrument. 2、Stable Performance: Using imported chips, stable performance. Every detail through multiple processes, after many tests, carefully bulid. 3、High Indication Accuracy: Stepper motor drive pointer, accurate display of engine speed, and with liquid crystal display clear display of mileage. 4、Easy Installation: Easy to install, after installing to the hole, twist the knob and then screw the cover. 5、Widely Use: GPS speedometer is suitable for cars, engines, boats, saloon cars, yachts, engineering machinery, etc. Specification： Item Type: GPS speedometer Material: ABS+Stainless steel Lighting Color: 7 color (adjustable) Signal: GPS Install Caliber: Approx. 85mm/3.35in, and make sure there is at least Approx. 55mm/2.17in space behind the dashboard Operating Voltage: 9-32V DC Operating Current: ≤100mA Indication Range: 0-120KM/H Operating Temperature: -30℃ - +75℃ Storage Temperature: -40℃ - +80℃ Fitment: Suitable for cars, engines, boats, saloon cars, yachts, engineering machinery, etc. Package List： 1 x GPS speedometer 1 x GPS Receiver Box 1 x Instructions 1 x Screw Cap