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、By pressing the mode button on the back of the gauge for 3 second continuously to switch the 3 different digital display, press the mode button again, you can select trip 1, trip 2 or COG, but they can not show at the same time. 3、Red, green, blue, white, yellow, orange, purple, totally 7 kinds different backlight color, it will change automatically every 1 minute, or you can fix only one color that you like by presssing the gauge back set button. 4、IP67 waterproof and dustproof, 316L stainless steel bezel, and equipped with anti‑fog curved glass, it can be used for a long time even in acid, alkali and humid environments. 5、The wire harness connector has a buckle to achieve the best and firm connection, so that it can work normally even under strong vibration. The speedometer can be used for engine/generator sets, ships, construction machinery, agricultural machinery, car modification, etc. 6、The stepping motor is suitable for the whole series of stepping instruments, and has the advantages of low power consumption, long life and high precision. Ultra‑wide working voltage design (long‑term working voltage: 9‑32V, maximum reach: 36V, (≤1 minute)). Item Type: GPS Speedometer Material: Stainless steel 316L bezel + anti-fog glass Install Diameter: Approx. 85mm or 3-3/8in Backlight Color: 7 backlight color Indication Range: 0-200km/h Working Voltage: 9-32VDC Connection Method: Row insert Input Signal: GPS with antenna Working Current: : ≤100mA Operating Temperature: -30℃ - +75℃ Storage Temperature: -40℃ - +85℃ Grade of Protection: IP67 waterproof and dustproof grade Application: 12V/24V vehicles, boats, yachts, RVs and other vehicles Wiring: Red - positive; Blue - negative; Orange - backlight. Function Introduction: 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. 3 different display: press the mode button on the back of the gauge for 3 second continuously, then you can select digital display mode, press the mode button again, you can select trip 1, trip 2 and COG, the 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 COG: Show azimuth angle,data will not be recorded, Remarks the unit of trip, total mileage and outta unit of dial are the same 4. The below is odometer (ODO) function,it will record total mileage automatically 5. 7-Color Backlight : Red, green, blue, white, yellow, orange, purple, totally 7 kinds different backlight color, it will change automatically every 1 minute,or you can fix only one color that you like by presssing the gauge back "set" button. 1 x GPS Speedometer 1 x GPS Speed Sensor 1 x Power Harness 1 x Manual