This tracks my steps, heart rate, calories burned, sleep quality, water proof, actigraphy, weekly tracking and more. So now instead of me guessing if I am getting enough exercise this tracks it also my family has a history of sleep apnea this will also show my sleep quality to see if that is good. This goes on my wrist and reversible band and the battery will also last a long time requiring no charging. Besides the one I got they have Core C200, Move C300 and so much more visit http://lifetrakusa.com/
My Opinion: It is hard to get on and off the wrist at this point until the plastic is torn down some. I do like the way it tracks my progress and making me healthier. The app easy to download to your phone with IOS 6 or higher.
You Tube: https://www.youtube.com/user/LifeTrakUSA
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Disclaimer: I was in no way compensated for this review and this is solely my won opinion which may differ from yours.