OVERVIEW: Track your activity levels, sleep patterns, heart rate data, and more with the small Fitbit Blaze Fitness Watch in black. This wrist-worn tracker uses GPS along with a complex array of sensors to record how many steps you take, your distance traveled, calories burned, floors climbed, and how many minutes you stay active. It connects to your smartphone via Bluetooth and syncs its data wirelessly while providing you with notifications, workout assistance, and more.