Device interesting for who wants to control his activity level during the day. Just put on a belt or in a pocket and it gives you the number of steps taken, distance traveled and number of calories burned. The positives: the application (download from his phone, his computer or his tablet) uses data and gives you the daily activity period - the unit is easy to synchronize - it is easy to use The bad: data sometimes wacky (10,000 steps per 10 minutes of activity) Other information: length of about 5 months battery Attention fragile screen !! My old Fitbit passed away after 8 months of daily and intensive use as still in the pocket. The screen is split after contacting handlebar, he worked two days and then he mouru! Conclusion: I take my new Fitbit that when I walk. I leave since I ride my bike, I tinker, I garden ...