Features: 1.Wide Application: The speedometer can be applied in variety of stepping instruments, such as automobiles, engines, boat, RV, yacht, engineering machinery, etc. 2.IP67 Waterproof: With IP67 high waterproof and dustproof grade and anti fog curved glass, speed gauge is not afraid of bad weather, not easy to damage. 3.Characteristic: The speedometer has the advantages of low power consumption, long life and high precision. Ultra wide working voltage design, long term working voltage 9?32V, up to 36V. 4.Premium Material: Made of stainless steel and ABS, the speedometer can be used in acid, alkali and humid environment, durable and long service life. 5.Simple Operation: Easy to install, with a detailed manual, installation, wiring and the use of the function have a clear description. Specification: Item Type: GPS Speedometer_x000D_ Material: Stainless Steel + ABS_x000D_ Dial Color: Black, White_x000D_ Screen: LCD screen_x000D_ Dial Backlight Color: Colorful (can be adjusted manually or switched automatically)_x000D_ Signal: GPS_x000D_ Range: 0-200MPH; 0-300KM/H (dial double scale, inner ring km/h, outer ring MPH)_x000D_ Working Voltage: 9-32V DC_x000D_ Installation Hole Diameter: 85mm/3.35in, and ensure that there is at least 55mm/2.17in space behind the dashboard_x000D_ Working Temperature: -30-+75_x000D_ Storage Temperature: -40-+80_x000D_ Applicable Scenarios: Universal for automobiles, engines, boats, RVs, yachts, engineering machinery, etc._x000D_ Description: The default prompt of the product is a single mileage, which will not be cleared when the power is off. Press and hold the rubber on the back for five seconds to clear the single mileage_x000D_ The accumulated mileage will not be cleared if the power is off (the total journey cannot be cleared)_x000D_ COG shows the direction of the ships navigation, and the car shows the position