Activity sensor ; records activity & sleep and transmits data via Bluetooth to a smartphone. Tracks steps, distance, calorie consumption, fat burn, activity duration & daily goals. Records sleep motion & duration. Time & battery status indicator. 30 day memory. Alarm function. Full use with Beurer free apps Health Manager & Body Shape. Connectivity to the free Beurer health manager or body shape app for activity analysis. Display information LED screen. Battery Typical usage time of up to 4 days. Low usage time of up to 4 days. Features Pedometer. Accessories included: charging cable & instruction manual. Manufacturers 3 year guarantee.