Suitable for all cars, vessels, boats, and yachts. The signal comes directly from the satellite signal receiver (GPS Speed Sensor). The gauge features high precision, quick location confirmation, and short startup time. IP67 rated for waterproof and dustproof performance. Equipped with stepper motors for full-range stepping gauges, offering low power consumption, extended lifespan, and high accuracy. Features curved glass with anti-fogging function. Ultra-wide working voltage design: long-term operating voltage 9-32V DC, with maximum up to 36V for less than or equal to 1 minute. Fixing dimension: 85mm (3-3/8 inches). Indicating range: 0-160MPH / 0-200KM/H. Working voltage: 9-32V DC (compatible with 12V and 24V systems). 7-color backlight: red, green, blue, white, yellow, cyan, purple (automatic cycling). Functions: 1. COG displays navigation course and orientation. 2. Trip meter shows short mileage with power-failure memory. Long press button to reset. Total mileage can also be displayed with power-failure memory. 3. Displays total mileage that is non-resettable. 4. OLED LCD display with operating temperature range of -40C to +80C. Wiring connections: Red: 9-32V DC power Black: Ground Blue: Connect to button to reset trip mileage Yellow: Backlight control Note: Product design may vary slightly between batches. Actual product may have minor differences in appearance or color compared to images, which does not affect functionality. Type: 0-160MPH Color: Black background with silver edges Material: Stainless steel Package Contents: 1 x GPS Speedometer (Other accessories not included) Note: Lighting and display differences may cause slight color variation between image and actual item. Measurement tolerance: +/- 1-3cm.