52mm Digital GPS Speedometer Gauge MPH Kmh Knots Waterproof LCD For Car Boat
Indicating Range: 0~999 (MPH, Knots, Km/h adjustable). - Switch unit between MPH(Mi), Knots(NMI) and Km/h (KM) by Backside Button. -IP67 waterproof and dustproof grade. -Operation mode: LCD display, stepper motor.