1、Equipped with IP67 waterproof and dustproof grade, with excellent waterproof function, can work in water. 316L stainless steel can be used for a long time even in acid, alkali and humid environment. It has curved glass with anti‑fog function. 2、The LCD display clearly shows the mileage, has the characteristics of high indication accuracy, repeatability and versatility, reliability and stability, and relatively simple drive and control. Suitable for the modification of various vehicles, the stepper motor drives the pointer, which can accurately display the engine speed. 3、The stepping motor is suitable for the whole series of stepping instruments, with low power consumption, long life and high precision. With ultra‑wide working voltage design (long‑term working voltage: 9 ‑ 32V, maximum reach: 36V, (≤1 minute)). 4、The harness connector has a buckle to form the best and firm connection, The pressure gauge can also work normally under strong vibration. This product can be used for engine/generator sets, ships, construction machinery, agricultural machinery, automobile modification, etc. 5、Suitable for car, boat, yacht, RV. The signal comes directly from the satellitesignal receiver, also called GPS speed sensor. This instrument has the advantages of high accuracy, fast position confirmation, and short start‑up time. Item Type: Speedometer Material: Stainless steel 316L bezel + Anti-fog glassInstall Diameter: 85mm or 3 - 3/8in Indication Range: 60MPH, 0 - 220KM / H Input Signal: GPS signal Backlight Color: Red, Green, Blue, White, Yellow, Orange, Purple, Light Green, 8 colors available, you can press the button to choose anyone. Operating Current: ≤60mA OperatingTtemperature: -30℃ - +75℃ Storage Temperature: -40℃ - +85℃ Protection Class: IP67, can work underwater approx. 1m/39.4in position Functions: Needle shows current speed Led Window Shows: TRIP/COG(choose anyone) and ODO TRIP01(Default) one-trip mileage which will come back to 0 after power off, TRIP02 one-trip mileage which accumulates after power off, but you can press ''Set'' button for 3 - 5 seconds to clear the data. COG - moving direction ODO - recording total mileages automatically and cannot be reset Mode: LCD display, stepper motor 1 x GPS Speedometer 1 x GPS Speed Sensor 1 x Power Harness 1 x Manual