Features 1、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、Equipped with IP67 waterproof and dustproof grade, with excellent waterproof function, can work in water. 3、With ultra‑wide working voltage design (long‑term working voltage: 9 ‑ 32V, maximum reach: 36V, (≤1 minute)). 4、Suitable for car, boat, yacht, RV. The signal comes directly from the satellitesignal receiver, also called GPS speed sensor. 5、This instrument has the advantages of high accuracy, fast position confirmation, and short start‑up time. Specification Item Type: Speedometer Material: Stainless steel 316L bezel + Anti-fog glass Install Diameter: 85mm or 3 - 3/8in Indication range: 0 - 200km/h Connection Method: Row insert Input Signal: GPS with antenna Working Current: ≤100mA Operating Temperature: -30℃ - +75℃ Storage Temperature: -40℃ - +85℃ Waterproof Grade: IP67 Application: 12V/24V vehicles, boats, yachts, RVs and other vehicles Function: 1.Speed odometer use stepping motor drive pointer, can show the speed of engine precisely, and also can show the mileage clearly with LCD display screen 2.Different display: Press the gauge back "mode" button 3 second continuously, then you can select digital display mode set, press "mode" button again, you can select trip 1, trip 2 and COG 3 kinds different display method, but they can not show at the same time. 3.Trip 1: Short mileage, data will not be recorded after power off Trip 2: Short mileage data will be recorded after power off, users can hold the "set" button for 3 - 5 seconds to clear 4. COG show azimuth angle, data will not be recorded, Remarks the unit of trip, total mileage and outta unit of dial are the same 5. The below is odometer (ODO) function, it will record total mileage automatically 6. 7 Color backlight: Red, green, blue, white, yellow, orange, purple, a total of 7 different backlight colors, it will automatically change every 1 minute, or you can press the pressure gauge back to only fix "Settings" button of one color you like. Package List 1 x GPS Speedometer 1 x GPS Speed Sensor 1 x Power Harness 1 x Manual