Fitbit Charge Wireless Activity Wristband, Black, LargeFormat: Retail Pkg Age: Platform: N A Track your activity levels, sleep patterns, and more with the Fitbit Charge Wireless Activity Band. This activity monitor tracks everything from how many steps you take, to how far you"ve traveled, to how many floors you"ve climbed! You can even use it to track your sleep at night and wake up more peacefully thanks to the built in vibrating alarm. It features an OLED display so you can see your progress in real