Fitbit Charge 2 Heart Rate + Fitness Wristband, Black, Large (US Version)

• PurePulse continuous, automatic wrist-based heart rate tracking to better measure calorie burn all day
• Maximize your workouts using simplified heart rate zones (Fat Burn, Cardio and Peak)
• See call, text & calendar notifications on the OLED display; Automatically track how long and how well you sleep and wake with a silent vibrating alarm
• Get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score; Use Connected GPS during run mode to see real-time stats like pace and distance on your wrist
• Track all-day activity like steps, distance, calories burned, floors climbed and active minutes;Find moments of calm throughout your day with personalized guided breathing sessions based on your heart rate
• US Version