This was a horrible Chinese combo keyboard (no brand name) I found long ago, at a Longs Drug store for $5. It contained exactly one chip on a tiny PC board – plus a lot of buttons and a 3-octave keyboard. I cut it down and installed it in a small box. Switches allow you to misconfigure the scanned function-selector buttons, the knob drags the pitch waaaay down. Instant Skinny Puppy happy pop music. Runs on 4 AA cells.