Specification: -Fixing dimension: 85mm(3-3/8 inches) -Indicating Range: 0-160MPH 0-200KM/H -Faceplate Color: Black faceplate with Stainless Steel. -Working Voltage: 9-32VDC(12VDC/24VDC) -7 Backlight color: red, green, blue, white, yellow, cyan, purple(automatic) Feature: -Suitable for all cars, tractors, vans, vessels, boats, yachts, etc. -The signal comes directly from the satellite signal receiver (GPS Speed Sensor) -The gauge has the advantages of high precision, quick location confirmation and short start up time. -IP67 waterproof and dustproof grade -Stepper motors used for full range of stepping -gauges, great feature with its less power consumption, longer life, higher precision, etc. -With curved glass (with anti-fogging function) -With ultra-wide working voltage design( long-term operating voltage: 9-32V, Maximum up to: 36V ( 1 min)) Functions: 1. The dial is printed with double units, the outer ring is English units (MPH), and the inner ring is metric units (km / h) 2. COG is used to display the navigation course and orientation of the ship, and the orientation is displayed on the car 3. Trip displays short mileage, which can be saved in case of power failure. Long press the key to reset, and the total mileage can also be displayed, which can be saved in case of power failure. 4. Displays the total mileage, which is not adjustable. 5. OLED LCD, working temperature - 40 ~ + 80 Connection: Red: 9-32VDC(+) Black: Ground(-) Blue: Connect the button with the blue line to adjust the short mileage setting to zero Yellow: Backlight(+) Package 1 Includes: 1x GPS Speedometer 1x GPS Speed Sensor 1x Multi-plug socket 1x Installation Instruction Package 2 Includes: 1x Only 85MM Gauge Holder