16 knobs that control 3 oscillators that feed into 4 NAND gates. 2 x 1/4" mono outputs, operates on a 9V power supply. Oh, and did I mention that there's a switch on the left hand side there that controls a motor that turns the big knob in the middle, the knob that's a master pitch/rate control for the entire thing? Did I mention that you can turn that big ol' master knob independently from the motor control, or in conjunction with the motor? I didn't? Oh, well, it's got a motor in it! Shit!Here's a video.