● Low power accelerometer with PedometerEngine TW20 Step counter accurately counts up to 100,000 steps at every angle of tilt Automatic activity timer counts up to 100 hours Measures moderate to vigorous physical activity (MVPA) time 5-second display accuracy filter prevents recording false steps Magnum display digits for easy viewing Hibernate mode keeps preserve power from factory to user Sleep mode activates after 5 minutes of no activity to help keep power consumption low Up to 5 years of battery power Requires 1 CR2032 battery (included) 5-year warranty