Features1Saveable Single Mileage: The default prompt 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. The accumulated mileage will not be cleared if the power is off (the total mileage cannot be cleared). 2Wide Application: COG is to display the direction of the ship's navigation, and display the position on the car. Suitable for a full range of stepping instruments, can be used for car, engine, boat, RV, yacht, engineering machinery, etc. 3Durable Construction: Made of stainless steel and ABS, can be used in acid, alkali and humid environments, durable and have a long service time. Waterproof and dustproof grade, with curved glass, antifog, no need to worry about the damage bad weather may cause. 4Stable Performance: Low power consumption, long life and high accuracy. With ultrawide working voltage design, longterm operating voltage is 9 to 32V, maximum can up to 36V. High and low temperature resistance. 5Easy Installation: Install the caliber 85MM, and ensure that there is at least 55MM space behind the dashboard. The black wire is connected to the negative pole, and the other wires are connected to the positive pole. With a detailed manual, will clearly describe the installation, wiring and use functions.SpecificationItem Type: GPS speedometerMaterial: Stainless steel + ABSDial Color: Black, whiteScreen: OLED screenDial Backlight Color: 7 color (can be adjusted manually, can be automatically switched)Signal: GPSRange: 0-200KM/HWorking Voltage: 9-32V DCInstallation Caliber: Approx. 85mm/3.35in, and ensure that there is at least 55mm/2.17in space behind the dashboardWorking Temperature: -30-+75Storage Temperature: -40-+80Applicable Scenarios: Universally used in automobiles, engines, boats, RVs, yachts, engineering machinery, etc.Package List1 x Speedometer1 x GPS Receiver1 x Manual