Get continuous, precise Pure Pulse® wrist-based heart rate reading, track all-day activity & understand sleep patterns using the Fitbit Alta HR large fitness tracker with heart rate sensor. With a stylish, eye-catching & super-slim design, the tracker is a great companion during workouts & everyday activities & provides insights to help you sleep better thanks to Auto Sleep Tracking & Sleep Stages features. For a better understanding of your fitness level, there is Cardio Fitness Level feature & the device monitors steps, distance, calories burned, active minutes, hourly activity & stationary time 24/7. Also, it has a user-friendly tap OLED display & allows for checking calls, texts & calendar alerts due to Smart Notifications feature. Most importantly, the tracker automatically recognizes activities with Smart Track feature & offers friendly Reminders to Move enabling you to reach your goal every day.