These how-to videos show how easy it is to use your BEHRINGER interfaces to connect an iPad or iPad 2 to a mixer, MIDI controller, condenser mic, turntable, or guitar.
The BEHRINGER UMX490 is a keyboard MIDI Controller, the mid-size version in the UMX line, including the UMX250s and the UMX610 http://www.behringer.com/EN/Products/UMX490.aspx