The only good thing about this devicee is ipthe battery backup. I do not suggest you to buy this band because ut has a very small display making it hard to see even the time. The screen has a very thin sheet of glass which makes it very sensitive.The strap provided along with the watch is of very bad quality plastic.The heartbeat senser never works and it irritates a lot.You have to download the mi fit app in order to make your band work.The number of steps measured are always wrong.While I was driving it took number of steps to 2000.I strongly recommend you not to buy this band as you will end up getting frustrated and you will regret buying it.The product is cheap so it does not mean that xiaomi will use bad quality.