1Multifunction speedometer can display speed(KM/H), single mileage, total mileage, single mileage will reset when power off yet total accumulated mileage will be saved. 2GPS can shows course, driving direction, mirror tempered glass+clear backlight display, easy to read the results. 3High quality ABS, 316 stainless steel and tempered glass material, wearresistance and corrosionresistance, durable to use. 4IP67 waterproof and dustproof grade, adapt to the harsh environment, suitable for s, yachts, outboard motors, automotive engineering machinery, motorcycles, etc. 5Simple installation, 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. Item Type: GPS Speedometer Material: ABS+316 Stainless Steel + Mirror Tempered Glass Working Voltage: 9-32VDC Installation Diameter: Approx. 85mm/3.3in Waterproof: IP 67 Wiring: Black: Ground (-) Red: 9-32V DC Yellow: Backlight 1 x Multifunction Speedometer 1 x GPS 1 x English Installation Instructions