A casio pt80 with upgrades... the knob on the side is pitch... which speeds it up a little.. and slows it down a whole bunch... it has a rom card with songs on it.. casio-ized "thriller" sounds pretty good when you play it at about 10 bpm.. Also has 2 contact points which do nice things and dont crash it at all! A switch that activates funky electronic drum stabs... a switch which makes the harmony part over-driven.. switches that turn off the harmony and lead parts.. a switch that makes the drums noisey and snarish sounding when used in conjunction with the other drum switch.. and a switch that activates a tone with acompaning switchable optrol.