Get motivated to move more with Fitbit Charge FB404BKS Wireless Activity Tracker, by tracking all-day activity like steps taken, distance traveled, calories burned, floors climbed and active minutes. Charge lets you see every stat as it happens - right on your wrist, with a bright OLED display. And, with an industry-leading battery life of 7-10 days, you can find the inspiration to beat your goals - no matter what the week brings. Built with Caller ID, Charge shows your incoming calls when your phone is nearby to help you take control of your day and your schedule.