Very clean example of Lumatone Isomorphic midi controller. Includes power supply:

This is an "Isomorphic" midi controller. Isomorphic meaning that chord and scale shapes remain consistent regardless of the pitch. For example, a c major scale fingering is the same as a d major scale, and so on. There are also numerous microtonal possibilities. The instrument is fully programmable and supports the MPE (midi polyphonic expression) profile if desired. Uses conventional MIDI i/o and the computer editor is accessed via USB. USB also supports conventional MIDI functionality.

The Lumatone company is active, since their first shipping. They are constantly improving their software. As of recently, they feature a user based online library of keyboard mappings.

Note in photos, front rail and rear rails have a few minor blemishes. Instrument has been handled carefully and works perfectly.