Teachers love the durability of the Digi-Walker™ pedometer, its ease of use, and its exceptional readability. Three different models let you choose the level of performance that's right for you or your class: Elementary monitors steps only; Intermediate monitors steps and distance and has clock and stopwatch functions; Advanced monitors steps, converts steps to miles, and monitors calories. Order individually or in packs of 15 or 30 pedometers with storage cases.