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Continuous 24/7 Wrist-Based Heart Rate Tracking Multi-Sport Tracking Smartphone Notifications Make every beat count with Fitbit Charge 2™—the all-new heart rate and fitness wristband. Maximize workouts with PurePulse heart rate, multi-sport modes and Connected GPS. Track all-day activity, exercise and sleep. And make the most of your routine with smartphone notifications, Reminders to Move and guided breathing sessions. Key Features Purepulse® Heart Rate Continuous, automatic, wrist-based heart rate tracking without an uncomfortable chest strap. All-Day Activity Tracking Track steps, distance, calories burned, floors climbed, active minutes and hourly activity. Auto Sleep Tracking Automatically track how long and how well you sleep and set a silent vibrating alarm. Multi-Sport Tracking Easily record runs, biking, weights and more with real-time stats on display. Connected GPS Connect Charge 2 with the GPS on your phone to see real-time stats like pace and distance on display and record a map of your route in the Fitbit® app. Auto Exercise Recognition SmartTrack™ automatically recognizes select exercises (running, biking and more) and records them for you in the Fitbit app. Cardio Fitness Level Get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score. Guided Breathing Sessions Find moments of calm throughout your day with personalized guided breathing sessions based on your heart rate. Smartphone Notifications See call, text and calendar notifications on display (when your phone is nearby). Reminders to Move Get friendly Reminders to Move that encourage you to reach an hourly goal of 250 steps. Hi-Res Tap Display Tap the screen to see your stats on the interactive OLED display. Interchangeable Bands Switch up your look with accessory bands in leather and more. Long Battery Life Battery life up to 5 days so you can track all day and night without needing a charge.* *Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. Wireless Syncing Sync stats wirelessly and automatically to your computer and 200+ leading iOS, Android and Windows™ devices. Water Resistance Fitbit Charge 2 is sweat, rain and splash proof. However, the device is not swim proof or shower proof. With any wearable device, it’s best for your skin if the band stays dry and clean.