It is second generation electronic autoharp technology extraordinaire. No samples or MIDI or anything digital (I think) - sounds completely analog and early 80's if I can place it. Strum with your finger the 'Sonic Strings' while holding a chord of your choice and hear magic. All twelve keys represented, in major, minor, dom7, maj7, min7, aug, and dim. You can play any song, and amazingly easy. Internal speaker, also 1/4" instrument output. Runs on DC adapter 12V as well as a shitload of batteries. Somewhere between kid's toy and quality instrument, quite possibly the opposite of cool, and yet so very cool. Model OM-84, the second revision, this adding a chord memory feature that lets you be able to play rhythm and lead all at once.