Mechanical Speedometer for Bicycle, Universal Bike Cycling Odometer Waterproof Mechanical Speedometer

Good bicycle stopwatch provides odometer clock and speedometer function, more useful. Waterproof and anti-shock function can be useful, suitable for most kinds of surroundings. Easy to install and use. Unique backlight function, convenient and useful. Works well to measure speed,distance,riding time calorie counter and etc which what any serious bicyclist or fitness fanatic needs. Package Included: 1pc Mechanical Speedometer. It can be hung on the left or right side of the bicycle. It can be reset.