Feature 1GPS speedometer, lower power consumption, longer life, higher accuracy, fast position confirmation, and short startup time. 2Display speed (unit KM/H), GPS and total accumulated mileage. The total mileage will be saved when power is off. 3Wide range of applications, suitable for ships, yachts, outboard motors, automotive, engineering machinery, motorcycles. 4Highquality ABS+316 stainless steel + mirror tempered glass, strong and durable. IP67 waterproof rating, not easy to damage. 5The installation is simple, just open a 85mm (3 3/8 in) hole on the dashboard, and leave 55mm (2 3/16 inch) behind the panel to fit the meter.Item Type: GPS SpeedometerMaterial: ABS+316 Stainless Steel + Mirror Tempered GlassWorking Voltage: 9-32VDCDial Diameter: Approx. 79mm/3.1inInstallation Diameter:Approx. 85mm/3.3inWiring:Black: Ground(-)Red: 9-32VDCYellow: Backlight .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 Speedometer1 x GPS1 x English Installation Manual