85mm Boat Speedometer with Step Motor 7 Color Backlight Red Pointer 200MPH Waterproof Speed Gauge for Yacht RV Truck Motorcycle Item Type: 85mm Boat Speedometer Material: Stainless Steel 316L Bezel + Anti fog Glass Protection Level: IP67, fully waterproof; excellent anti fog function; Backlight Color: Red (default) - green - blue - white - yellow - yellow green - orange - purple (color can be switched) Display: Digital + Pointer Operating Voltage: 9-32VDC Operating Current: ≤100mA Operating Temperature: -30℃ to +70℃ Storage Temperature: -40℃ to +85℃ Protection Level: IP67, can work underwater in the 1m position Sensor Wiring Length: 3.9m / 12.8ft Fitment: Fit for Boat Yacht RV Truck Motorcycle Wiring: 1. Red wire -- +9-32VDC 2. NC (not connected) 3. Orange wire -- Backlight (+) 4. Blue wire -- Power supply negative (-)