I use this band 4weak
it, s really great.
battery backup almost 7day.
and it looks great.
bt it was 1 problem
it is lettle uncomfortable to wear sleeping.
but otherways ist gd.
is works fast.and 92% correct result is show.
I use it daily.and I am happy by use this product.
guy, s I thik if you buy a fitness band.
m2 band is best.
and it is chefer then the other band