The Fitbit HR gets you geared up for fitness with continuous, automatic, wrist-based heart rate and simplified heart rate zones.  Track workouts, heart rate, distance, calories burned, floors climbed, active minutes and steps.  Monitor your sleep automatically and wake with a silent alarm.  See call notifications, daily stats and time of day on the OLED display.  Sync stats wirelessly and automatically to your computer and over 150 leading smartphones.  Size: Small.