Waterproof Bicycle Bike Cycle LCD Display Digital Computer Bike Speedometer Waterproof And Cycling Odometer With Automatic Wake-up LCD Display Outdoor Sport Computer SpeedometerDescription: EASY SET UP: Suitable for almost all cycling bicycles, you may install the magnet on a spoke and sensor on front fork keeping appropriate gap between them. NOT suitable for bike wheels without spokes. MULTI FUNCTIONAL SPEEDOMETER: Measures and records Current Speed, Average Speed, Max Speed, Distance, Riding Time; POWER SAVING MODE: Without operation for 5 minutes, the speedometer enters auto sleep mode showing only clock for battery