Features： 1、Function: Display longitude, latitude, miles, single mileage and accumulated mileage. With backlight, it is convenient to view by boat at night. 2、IP67 Waterproof: Stainless steel front cover bezel and anti fog curved glass cover, which can be used normally even in acid, alkali and humid environments. 3、Anti Fog Function: High transparency PC and curved glass structure form a double layer of anti fog, and the anti fog performance is much higher than that of single layer glass coating anti fog agent. 4、High Accuracy: The LCD screen is adopted, which is characterized by high accuracy, strong universality, reliability, stability, and ease of use. 5、Wide Working Voltage Design: Working voltage 9‑32V, low power consumption, long life, short starting time It is very suitable for ships, fishing boats, yachts, outboard engines and other kinds of water vehicles. Specification： Item Type: GPS Speedometer Material: ABS, metal Installation Size: Approx. 52mm/2.05in Function: Display longitude, latitude, miles, single mileage and accumulated mileage Working Voltage: 9-32V Working Current: ≤ 100mA Operating Temperature: - 20 -+70 ℃ Storage Temperature: - 30 -+80 ℃ Display Mode: LCD Display Range Of Speedometer: 0-999.9 Total Mileage Display Range: 0-999999 Trip Mileage Display Range: 0-999.9 Applications: Used in motorhomes, yachts, fishing boats, ships, engineering machinery, agricultural machinery, modified vehicles, etc. Package List： 1 x Speedometer  1 x GPS 1 x Manual