You will be able to unlock your smartphone in
an instant whenever the Xiaomi Mi Band 2 is nearby. It delivers real time
messages and notifications to your wrist, so you don’t miss out on important
things. Also, the band uses 2nd generation, low energy Bluetooth v4.0 that
delivers stable, fast connections without consuming much power. Plus, its high
density Lithium Polymer battery delivers up to 20 days of battery life.