Speed odometer use stepping motor drive pointer, can show speed precisely, and also can show the mileage clearly with LCD display screen Specifications: Name:GPS Speedometer Material:stainless steel 316L bezel+anti-fog glass Panel color:Black Backlight Color: White Fixing dimension: 85mm(3-3/8) Working voltage:932VDC Working current:? 100mA Operating temperature: -30°75° Storage temperature:-40°85° Levels of protection: IP67 Indicating Range: 0999MPH Suitable for car truck boats off-roadvehicles boats.