1、Waterproof: The GPS speedometer is made of stainless steel 316L frame, well sealed, high strength, which is waterproof and dust proof. 2、Antifogging: Adopting anti fog glass, GPS speedometer has great antifog effect, can be used in any weather condition, suitable for marine enviroment. 3、Advantages: Working voltage of speedometer is DC 9‑32V, TFT screen, digital display. GPS has high accuracy and fast position confirmation. 4、Multi Function: GPS speedometer has multi function display, such as single mileage, accumulated mileage, altitude, heading, longitude, latitude and speed. 5、Universal Application: Speed meter is widely used in motorhomes, yachts, fishing boats, ships, motorcycles, automobile modification and other fields. Item Type: GPS Speedometer Material: ABS+Stainless Steel+Anti Fog Glass Working Voltage: DC 9-32V Working Current: ≤ 100mA Operating Temperature: - 20-+70℃ Storage Temperature: - 30-+80℃ Display Range Of Speedometer: 0-999.9 Total Mileage Display Range: 0-999999 Trip Mileage Display Range: 0-999.9 Digital Compass: 0-359 Installation Dimension: Approx. 85mm / 3.35in Function Display: Single mileage, accumulated mileage, altitude, heading, longitude, latitude and speed Application: RV, yacht, fishing boat, ship, motorcycle, automobile modification and other fields 1 x Speed Meter 1 x GPS 1 x Manual