Usage Tips:Suitable for all cars, , , 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 (less than equal 1 min)) Fixing dimension:85mm(3-3/8 inches) Indicating Range:0-160MPH 0-200KM/H Working Voltage:9-32VDC(12VDC/24VDC) 7 Backlight color:red, green, blue, white, yellow, cyan, (automatic) Functions: 1. COG is used to display the navigation course and orientation of the ship, and the orientation is displayed on the car 2. 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. 3. Displays the total mileage, which is not switched. 4. OLED LCD, working temperature - 40 - +80 Connection: Red:9-32VDC(+) Black:Ground(-) Blue:Connect the button with the blue line to switch the short mileage setting to zero Yellow:Backlight(+) Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Type:0-200KMH Colour:B:Black background with black edges Material:Stainless steel Package Contents: 1 x GPS Speedometer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.