Fitbit Charge HR Wireless Heart Rate + Activity Wristband Make every beat count with Charge HR—a high-performance wristband with automatic, continuous heart rate and activity tracking right on your wrist. See heart rate all day and during workouts to get more accurate calorie burn, reach your target workout intensity and maximize training time. Track steps, distance, floors climbed and sleep quality and more, and stay connected with Caller ID and time of day on display. Charge HR also wirelessly syncs to your smartphone and computer so you can monitor your trends and get the motivation you need to push yourself further—every step, every beat, every day. PurePulse Heart Rate Get continuous, automatic, wrist-based heart rate monitoring and see simplified heart zones—with no uncomfortable chest strap. Activity Tracking Track steps taken, distance traveled, calories burned, floors climbed and active minutes. Auto Sleep + Silent Alarm Automatically monitor how long and how well you sleep and set a silent, vibrating alarm. Exercise Tracking Record workouts in Exercise Mode, then see detailed workout summaries on your smartphone. Caller ID See call notifications right on your wrist when your phone is nearby. OLED Display Bright display shows daily stats and time of day right on your wrist.