ELING Boat Car GPS Speedometer Digital LCD Speed Gauge Odometer Course with GPS Antenna 3 3/8" 9-32V

-Suitable for all vehicles, marine vessels and off-road vehicles -The signal comes directly from the satellite signal receiver(GPS Antenna), don’t need other speed sensor. -The gauge has the advantages of high precision, quick location confirmation and short start up time. -IP67 waterproof and dustproof grade -Reverse polarity protection and anti-fogging performance -No Stationery Drift -Stepper motors used for full range of stepping gauges, great feature with its less power consumption, longer life, higher precision, etc. Technical Data: -Fixing dimension: 85mm(3-3/8") -Indicating Range: 0~999 (MPH, Knots, Km/h adjustable) - Switch unit between MPH(Mi), Knots(NMI) and Km/h (KM) by Backside Button -Trip and Odometer Adjustable, Mileage Range: 0-999999 (Mi,NMI,KM available)-Trip Counter - Compass Indicator Function -7 Colors backlight available1. Power on the speedometer firstly. Press and hold on the button at the back or external button for 5~6 seconds, the backlight will change, then release the button. ...