Fitbit Zip buying Wireless Activity Tracker

Product Name: Fitbit Zip buying Wireless Activity Tracker
Track your fitness easily! Tracks your steps, distance, and calories burned. Syncs wirelessly to smartphones and computers to follow your fitness buying trends. Share and compete with friends. Log food and workouts. Compatible with iPhone 4S and later, iPad3 gen and later, leading Android devices, leading Windows devices, Windows XP and later, Mac OS 10.6 and later. It is new in box and never been used. We did open it from the bottom very carefully to replace the battery as it is from 2015. It is in excellent working order.