Tracks steps, sleep and other activities. Garmin Connect app available for download Go to www.GarminConnect.com/vivofit. Uses CR 1632 batteries. ( just installed new on April 3, 2025) 2 bands included: white silicon and tan leather with gold and silver tone hardware. https://youtu.be/Ncwz5eweok8 manual avail at: https://www8.garmin.com/manuals/webhelp/vivofit/EN-US/GUID-E0C28652-FD9C-4FF4-B859-0265F3FB696A.html