The JUH660 Android Aoa (Android Open Accessory) / Otg (On-the-Go) Usb 2.0 2-port Hub is a unique mobile accessory that allows ultimate Android control with power charging. In Aoa mode, it enables you to connect any Usb keyboard and mouse, giving you the ability to navigate and type while simultaneously charging your phone. In Otg mode, it can automatically detect the power adapter and will use the power adapter to supply power to the connected Usb devices instead of using the phone's battery.