Mi band is very awesome in her design and excellent in her features there are many application in band to keep you fit such as pedometer, heart rate, temprature, distance travel, calories burned , tradmil, exercise, many faces of band, there are many application in google to connect this band in your smart phones like as mi fit app. Afte coonect this band in your smart phones it makes a super band which have many more features than before connect the band.Mi band 3 is totally waterproof.You can swim also with this band. Its battery life is very awesome and long life Up to 20 days and large screen.