Features: 1.Clear Display: GPS speedometer can display current speed and total mileage, providing red backlight with directional light. 2.Features: Marine GPS speedometer with high accuracy, fast positioning confirmation, short start up time, giving you an excellent use experience. 3.Rust Proof: GPS speedometer is made of stainless steel, rust proof, IP67 waterproof, and can adapt to harsh weather conditions. 4.Stable Signal: The signal comes directly from the satellite signal receiver (GPS antenna) and no other speed sensor is required. 5.Indication Range: 0?160MPH speedometer with 8000 RPM tachometer, suitable for marine boats, ATVs, vehicles, practocal for use. Specification: Item Type: GPS Speedometer Material: Stainless steel Fixed Size: 85mm(3 3/8in) Indication Range: 0-160MPH speedometer with 8000 RPM tachometer Backlight: Red backlight Signal: Global Positioning System Operating Voltage: 9-32V DC Operating Temperature: -40 to 85C Grade: IP67 waterproof The panel has standard 85mm (3 3/8in) holes and a 55mm (2 3/16in) clearance at the back of the panel to fit the gauge. Application: Marine boat, ATV, vehicle