I got one last May for my birthday. I have the Fitbit One which is a small clip on style that can be clipped to your waist band or in your pocket. The clip is very strong & have no trouble keeping it on but I usually wear it in my pocket. It records steps, distance, how many times you go up and down stair steps, sleep patterns and you can enter your foods you ate for the day and it tells you your calories plus carbs, fats & etc each day. Once a week, it gives me my Fitbit report. I really like mine. I have used various step counters over the years but this is the best I have used. I much prefer it over a wrist style. Mine is linked to my computer for reports. I get an email telling me it needs to be charged which I do by plugging into the computer - no batteries needed.