A key advantage of using AOA to connect peripherals is that many Android platforms are only capable of acting as a USB device and not a USB Host. AOA overcomes this limitation by utilizing the Android’s USB device port which all Android platforms have. Since the Android acts as the USB device, it saves on battery size by not providing the power. It is not necessary to develop special drivers to be loaded on the Android platform, and no rooting of the Android platform is required. Also, the complex USB host connection and software stack is not the responsibility of the Android platform.