Feature 1Clear Display: GPS speedometer can display current speed and total mileage, providing red backlight with directional light. 2Features: Marine GPS speedometer with high accuracy, fast positioning confirmation, short start up time, giving you an excellent use experience. 3Rust Proof: GPS speedometer is made of stainless steel, rust proof, IP67 waterproof, and can adapt to harsh weather conditions. 4Stable Signal: The signal comes directly from the satellite signal receiver (GPS antenna) and no other speed sensor is required. 5Indication Range: 0160MPH speedometer with 8000 RPM tachometer, suitable for marine boats, ATVs, vehicles, practocal for use.Item Type:GPSSpeedometerMaterial: StainlesssteelFixed Size: 85mm(3 3/8in)Indication Range: 0-160MPH speedometer with 8000 RPM tachometerBacklight: Red backlightSignal: Global Positioning SystemOperating Voltage: 9-32V DCOperating Temperature: -40 to 85CGrade: IP67 waterproofThe 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 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x GPSSpeedometer1 x GPS Connection Cable1 x User Manual