Hi Paul,
That "thing" connected to the mic stand is my iPad on which I display only
music leadsheets. It is not connected to the keyboard. I have several thousand leadsheets all in PDF format on the iPad and dozens of playlists for gigs. I use a 3 Euro program called "GoodReader" to display the music and it works great for me. The Ipad is being held in a holder made by "GigEasy" just for the iPad. You can google GigEasy and see all their equipment.

Deane