Feature 1、The speed odometer uses a stepping motor to drive the pointer to accurately display the engine speed, and is equipped with a liquid crystal display to clearly display the mileage. 2、Our GPS Speedometer has the characteristics of high indication accuracy, repeatability and versatility, reliability and stability, relatively simple drive and control, and so on. 3、316L stainless steel bezel, IP67 waterproof and dustproof, super corrosion resistance, can be used for a long time even in acid, alkali and humid environment. 4、Equipped with curved glass, with anti‑fog function, there is no need to worry about the content of the instrument being blocked by fog, and it is suitable for all kinds of vehicle modification. 5、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)). 6、The wiring harness connector has a buckle to achieve the best and firm connection, so that the gauge can work normally even under strong vibration. This product can be used for engine/generator sets, ships, construction machinery, agricultural machinery, car modification, etc. Item Type: GPS Speedometer Material: Stainless steel 316L bezel + anti-fog glass Install Diameter: Approx. 85mm or 3-3/8in Indication Range: 0-35knots,0-40mph Connection Method: Row insert Backlight Color: Red, green, blue, white, yellow, olivine, orange, purple,totally 8 kinds different backlight color, it will change automatically every 1 minute, or you can fix only one color that you like through press the gauge back set button Input Signal: GPS with antenna Working Current: : ≤100mA Operating Temperature: -30℃ - +75℃ Storage Temperature: -40℃ - +85℃ Grade Of Protection: IP67 Wiring: Red- positive; Blue - negative; Orange - backlight. Function Introduction: 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 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 The below is odometer (ODO) function, it will record total mileage automatically Pls Note: For this speedometer, it is recommended that the buyer first connect the GPS antenna (excluding) and then connect the power supply (please be sure to connect the GPS antenna first and then connect the power supply in the order), otherwise it is easy to cause damage to the GPS module. Package List 1 x GPS Speedometer1 x GPS Speed Sensor 1 x Power Harness 1 x Manual