The Fitbit Tracker is an amazing all-in-one monitoring device that gives you a wealth of feedback on your health and fitness levels. The Fitbit contains an accelerometer, pedometer and an energy expenditure measurement device to measure calories burned. The device itself is small and can be clipped on to one's clothes. It can be clipped anywhere on the body - to a sleeve, pocket, collar and will still gather data. The tiny device measures a large amount of fitness metrics: intensity and duration of physical activities, calories burned, steps taken, distance traveled, how long it took you to fall asleep, how long you were asleep and more. Well, it's not even really on the market yet, it's just available for pre-order, and won't start shipping until late December or early January.
Source : CNET News