PORTABLE & LIGHTWEIGHT: Each charging pack is the size of a USB drive. It’s so small you can put it right back in your pocket, or use it while it’s charging. EASY TO USE: Plug one of the charging packs and it will charge you mobile anywhere. No need to keep your phone in one place while using heavy power banks. You can even use it while using your mobile phone or playing games. CHARGING STATION: It comes with the charging station to charge 3 charging packs. 950mAh for each one.