Stay connected while tracking your all-day activity and exercise with the Fitbit FB407SBKL Charge 2 Large Fitness Wristband. This wrist-worn activity monitor tracks how many steps you take, your distance traveled, calories burned, floors climbed, and how many minutes you stay active. Thanks to its onboard PurePulse technology, the Charge 2 also provides continuous and automatic heart rate data. You can use this heart rate data to monitor your intensity, analyze the effectiveness of your activities, maximize your workouts, and moral without the need of an additional heart rate chest strap or accessory. Additionally, the Charge 2 features SmartTrack technology that automatically recognizes the exercise your performing and records your metrics to the free companion app.