Fitbit ‘Charge 2’ Wireless Activity & Heart Rate Tracker. This sleek, sporty wristband motivates you to achieve your fitness goals by calculating steps taken, calories burned, elevation climbed and distance traveled throughout the day and features a low-profile display to indicate your real-time progress. Record your workouts with multi-sport modes that give you real-time stats on screen or use the on-board SmartTrack technology to automatically detect and record your workouts. The Charge wirelessly syncs your stats to your computer or smartphone, then measures hours and quality of sleep before silently waking you with a vibrating alarm in the morning. PurePulse heart rate monitoring keeps a continuous tab on your heart rate and offers simplified rate zones for easy tracking. The included mobile app lets you track your food intake, graph your progress and watch for important trends across time, helping you achieve your training, sleep and fitness goals. You can also choose to compete with friends on the Fitbit leaderboard. The large OLED display shows caller ID, texts and calendar alerts when your smartphone is nearby, allowing you to screen incoming contacts during workouts so that you never miss an important call. Style Name:Fitbit ‘Charge 2’ Wireless Activity & Heart Rate Tracker. Style Number: 5247231. Available in stores.