Ekho's Busy Bee and Worker Bee pedometers are well-known for their durability and accuracy.  The Class Packs are ideal for measuring steps for large groups, classes and teams.  Set includes 32 BEE-FIT pedometers, 32 loss-prevention straps, a handy, see-through storage case and "Pedometer Power" by  Dr. Bob Pangrassi. Pedometers are covered by a 2 year manufacturer's warranty. Please choose model.