Earphone with drive-by-wire and MIC function Equipped with built-in drive-by-wire function, only a small press controlling your devices' volume, music playing and video playing, and answering or hanging up a call Most of the iPod, iPhone, iPad models accept drive-by-wire function All of the iPads audio and video function supported

Power Bank conversion Rate is power bank actual total discharge. Usually there is internal resistance in all mobile devices. and power bank will lost 5% - 10% power when you charge mobile devices because this internal resistance.

This portable mini cookie usb phone battery charger is perfect for business gifts, custom made with your own logo is available. Mini,small size help you reduce the import shipping cost. And built-in Li-polymer Battery type, safer to use and long lifetime.