I am Using this band since last 6 Months
What Is MI Band?
Mi band is band that fits in your hand like wrist watch and calculate your daily activity like how much you sleep every night, how much you run or walk everyday.
Some Special Features
Can count daily sleep hour’s(Also can count deep sleep)
Can count How much you burn calorie.
Will vibrate band when you got any phone calls.
Battery Backup
Once you full charge MI Band, Believe me you will no need to charge next 70 days(2 Months 10Days)
Funcationality
As it is samrt band.It comes up with a Mi band application For Android & iOS, Sorry for windows phone user.There are no official mi bnad app for windows phone user, But there are some unofficial app.
I am Using it since last 6 months it works well and no issue with it.It is also water proof so that you can’t miss 1 count.