Fitbit Charge 2 Heart Rate + Fitness Wristband: Put your daily exercise motivation on your wrist with the Fitbit Charge 2. This heart rate & fitness wristband automatically tracks all-day activity, sleep and exercise. It also features personalized exercise modes to view real-time stats on display, a way to track your cardio fitness level, and guided breathing sessions to help you find moments of calm in your day. Packed with the smartphone notifications you need most and a new sleek design with an interactive OLED display, Charge 2 is your perfect companion for all-day and workouts.