Guys , MI Band 2 is a very cheap and good fitness tracker . It has many features sush as it tells you the time , it counts your steeps taken , how many KM you travelled , how many calories you have burned , what is your heart rate , and how much battery you are having at present . These all things you can watch on your tracker and as it connects with your android divice with bluetooth any call and message you recieve will be displayed on your tracker it also tracks your sleeping period and many many things more . iIT IS WATER PROOF it is the best thing I like about this its battery pack is average as it lasts for 15-20 days ( depends on your usage ) its strap quality is very good as after wearing this for a long time will fogot that you are wearing something as it is very very light weight and all the functions work pritty well .