Sturdy adjustable wrist strap. Pedometer can be easily removed from strap and attached to shoe. Also works when placed in pocket. Tracks up to 99,999 steps, distance, calories burned and activity time through customized mobile app for Andriod or IOS. Monitors sleep quality, total time and number of occasions you were woken up. Replaceable button cell battery inserted. Energy saving auto shut-off and idle mode. Stores and recalls up to 14-days of data in memory.