52MM GPS Speedometer KM/H/MPH/Knots Gauge for Motorcycles Boat Car Waterproof UK
Switch unit between MPH(Mi), Knots(NMI) and Km/h (KM) by Backside Button. Indicating Range: 0~999 (MPH, Knots, Km/h adjustable). “UNIT”(switch unit between km/h, mph or knots). After selecting “UNIT”, the LCD will show km/h, mph or knots.