Feature 1、High Quality Material: Odometer is made of stainless steel and ABS, high hardness, rustproof, wear resistant. sturdy and durable. 2、Weather Resistant: With curved glass, anti fog, speed odometer can be used in acid, alkali and humid environments. 3、Excellent Performance: Low power consumption, energy saving, high accuracy, IP67 waterproof and dustproof, stable and reliable. 4、Easy Installation: Easy to install, with a detailed manual, convenient for using, save your time and energy. 5、Widely Application: GPS speedometer can be widely used for car, engine, boat, RV, yacht, engineering machinery, etc. Item Type: GPS Speedometer Material: Stainless steel+ABS Screen: OLED LCD screen Dial Backlight Color: Colorful (can be manually adjusted or automatically switched) Signal: GPS Range: 0-80MPH; 0-120KM/H (dial double scale, inner ring KM/H, outer ring MPH) Operating Voltage: 9-32V DC Install Caliber: Approx. 85mm/3.35in, and make sure there is at least Approx. 55mm/2.17in space behind the dashboard Operating Temperature: -30℃ - +75℃ Storage Temperature: -40℃ - +80℃ Fitment: Universal fit for cars, engines, boats, RVs, yachts, engineering machinery, etc. The default prompt is single mileage. If the power is off, it will not be cleared. Long press the rubber on the back for five seconds to clear the single mileage. Mileage outages will not be cleared (total journey cannot be cleared). COG is to show the sailing direction of the ship, the car shows the direction. Package List 1 x GPS Speedometer1 x GPS Receiver Box 1 x User Manual