The Molten Voltage SIMI is an in line display that works with with any midi controllers that send program changes. You can save display settings for up to 128 different program changes and the display has the ability to show 16 characters. A nice device to use if you don't have a display on your midi controller but would like to label settings for different parts in songs.
Demo by Step Audio (EN)
Demo by DoItYourselfMusician (EN)