The mi band comes with heart rate sensor and 2nd gen pedometer sensor that calculates your foot steps while running it also calculates how much you can sleep in a day or night and that data is record in your smartphone with the help of mi fit app you can also calculates how much calories you burn in on lap and also calculates our heart beat time to time it is more accurate than other fitness band in price range of rs 2000 so at last if you donot spend so much money on fitness band and want accurate band then go for mi band 2 as it also waterproof and scratch and dustproof also