this little device is very convenient: it measures your steps, the number of floors traveled (about 3m above sea level by level), calories burned based on your age, weight and size it is so small that it leaves easily forget! Moreover, sleep analysis is nice with the number of awakenings and agitation spread over time to sleep. its autonomy is excellent, in 15 days I have reloaded once. tested hiking and experiencing walking in town no complaints. increasingly, computer dashboard and phone is very well designed, although the food is quite tedious monitoring. I recommend it for anyone who wants to measure their daily activity and motivate through customized goals.