Mi band 2 is very awesome product.i bought it when I show the review of this band on youtube.they explained that product features, i am using mi 4i phone so I knew very well this product.so without thinking and searching any other band I ordered it .i used it from last 3 months, its a very reliable and accurete machine with lower price, i am impressed by this band because of the accuracy of this band.this band measure my heartbit and calories burn, this band also measure my foot steps too and I have set 3 alarm and one of its unique feature is to alert on call.battery backup of this band is around 20 days, in latest filmwere you can see call notification with name and message too
I personaly use this band regularly and its work fabulous and gives a accurate reading, this band is truely value for money and what you expect in that price