Features 1、Multi‑function odometer, can display speed (unit: KM/H), GPS, total accumulated mileage, and save total mileage when power off. 2、Using ABS, 316 stainless steel and mirror tempered glass, lower power consumption, longer life, higher accuracy, quick position confirmation, and short start‑up time. 3、Open an 85 mm (3 3/8 inch) hole on the dashboard and leave a 55 mm (2 3/16 inch) behind the panel to fit the meter. 4、It has a wide range of uses and is suitable for ships, yachts, outboard motors, automobiles, construction machinery, and motorcycles. 5、With IP67 waterproof rating, no fear of wind and rain, even in bad weather conditions. Specification Item Type: GPS Speedometer Material: ABS+316 stainless steel + mirror tempered glass Working Volatge: 9-32V DC Waterproof Rating: IP67 Mounting Diameter: Approx. 85mm(3 3/8in) Wiring: Black: Ground(-) Red: 9-32V DC Yellow: Backlight Package List 1 x Speedometer 1 x GPS 1 x English Mounting Instrusction