The xaomi Mi band is an activity tracker that comes with 41 mAH battery, bluetooth connectivity, sleep and step tracker. It has IP67 certification of water resistance.
My impressions : I have been using this product for nearly 2 years and I am of the opinion that this device lacks the basic provision of a clock face. It simply shows led lights that blinks and the device vibrates. This tracker cannot be used with any third party app and you have to install Mi fit app for using it. The sleep tracker has a bug as once I slept in the afternoon wearing the band but it did not track my sleep. The step tracker is not at all accurate and just swinging your arms while standing adds to the count.
Conclusions : This year the Mi 4 band will be released and I wish to upgrade to the newest version from this inaccurate fitness band which costed me Rs 899. Addkng a little more money, I believe I can get a more accurate product and a lot more features.