Fitbit Charge 2 Fitness Tracker Wristband Features: PurePulse Heart; All-Day Activity Tracking; Track steps, distance traveled, calories burned, floors climbed, active minutes, and how many minutes you stay active; the Charge 2 also provides continuous and automatic heart rate data; receive notifications from your smartphone. Download the Fitbit app to sync with a smartphone, which is available for iOS, Android, and select Windows devices. The Charge 2's built-in rechargeable battery lasts up to 5 days. Comes with charger. Fitbit was one of many smart watches I received and have never used (in new condition). OFFERS NOT ACCEPTED