This video offers an overview of the iTrack Dock and demo of how it works.
Note: The first 4 minutes focus on unboxing and registering the device. A technical demo follows.
The iTrack Dock offers dual Focusrite microphone preamps, two line inputs and an instrument DI, independent stereo monitor and headphone outputs, and a USB port for class-compliant MIDI instruments and controllers. The iTrack Dock is designed to offer everything needed to record, monitor and control music on a Lightning iPad. It even charges and powers the iPad at the same time.
The iTrack Dock is compatible with all Lightning iPads including iPad (4th Gen), iPad Air, iPad mini and iPad mini with retina display. See the Focusrite site for more info.