Mi band 2 is a smart and fitness band present a company known as xiaomi .They actually made a good product in a affordable price range that having a lots of features in build on it you can track you r daily walking, cyling and fitness status you can also know the calories burned and the heart pulse also that shows a accurate reading.you can connect it with your phone by enabling the bluetooth of ur phone and after downloading it’s app from play store named as mi fit you can also track your sleep time and you can also set the mi band 2 for the app notification of your smart phone . You can use this fit band on both Android and iOS .