It has features such as calling notifications which enables you receive a call and disconnect it, you can also send and receive messages through it but only supported to android Phones for which you need to download app
Battery Capacity : 70 mAh ,M3 water proof Smart fitness Band with Bluetooth or heart Rate sensor, activity Records, Sleep Monitor, Calore Burned, Rejected Calling, Alarm, Blood Pressure, Message, Usb Charging Supports smart phones, Tablets and PC's and also support Android and IOS