Stay motivated throughout the day & understand your sleep patterns with the Fitbit Alta HR special edition large fitness tracker offering continuous, accurate wrist-based Pure Pulse® heart rate measurement & simplified heart rate zones. It is Fitbit's slimmest wristband with heart rate & has a long battery life (up to 7 days) to let you track steps, distance, calories burned, active minutes, hourly activity & stationary time 24/7. To get a better understanding of your fitness level, there is Cardio Fitness Level feature & to enable you to check the stats, smartphone notifications & time, the Alta tracker is fitted with a tap OLED display. Thanks to Smart Track feature, it ensures automatic exercise recognition & to help you hit an hourly goal of 250 steps, the tracker delivers friendly Reminders to Move.