A rare version, and the only known model not to have 64 keys is the 106P (P for "Pupil"), a 44-note classroom model with a plastic case, no controls, one loudspeaker and no sustain pedal. The 106P was available as a set of eight on a folding frame, forming a portable keyboard lab. They were attached by a cable to a full-size teacher piano with controls to feature each pupil piano. This model appears to date from the early 1970s and was available in orange or beige. Page McConnell, of the rock band Phish, has played a customised 106P with an additional vibration circuit.