Xiaomi Mi Band 3 is a Fitness band that keeps a track of your daily fitness related activities and helps you achieve your health goals.compatible with devices that support Android 4.0 and IOS 7 and above OS.The activity sensors on the device work together and maintain the data on Step count,Heart rate monitor,Calorie count,number of Hours slept .The Fitness Band is Water resistant and hence you need not worry about a little drizzle or sweating while working out.On the connectivity front,it supports Bluetooth.Can be connected to your smartphone via Bluetooth and notifies you regarding Text Message,Incoming Call.It is available in Black Strap colour.