Description: Speedometer is suitable for Car ,ships, yachts, trucks, commercial vehicles, construction machinery, etc. You can also use it in other places according to your needs. Switchable Speed Unit:WaterProof Digital Speed Gauges can freely switch Kont, MPH, KM / H speed unit, which makes it easier to read data. Support 8 Direction Pointers: LCD Speed Gauge supports 8 direction pointers to bring you more convenience. IP67 Waterproof: Digital speed gauges are made of stainless steel, rust-proof, waterproof, durable, long service life, and not easy to damage. 316 stainless steel bezel with curved glass,a red backlight can be displayed Specification: Item Type: Speedometer Material: 316 Stainless Steel + ABS + PC Input Parameters GPS Signal Working Voltage: 9-32V DC Working Current:<120mA Working Temperature: -20-70 degrees Celsius Storage Temperature: -30-80 degrees Celsius Waterproof Rating: IP67 Wiring Connection: 1. Black Line: Negative Power Supply (-) 2. Red Wire: 9-30VDC Display Function: SOG: Ground Speed TRIP: Single Mileage, Cleared when Power Off ODO: Accumulated Mileage, Saved when Power Off Navigation Pointer: 8 Directions Can freely switch Kont, mph, km/h speed Units. Dial Diameter: Approx. 85mm/ 3.3in GPS SOG: Speed Over Ground: 0-600km/h - ODO: odometer: 0-999999km - TRIP: 0-999.9km (can be adjusted by the back button.) (Return Zero When off electricity) - COG: Course Over Ground Package Includes: 1x GPS Speedometer 1x GPS Antenna 1x cable 1x Instruction