EarthQuaker Devices Bit Commander Monophonic Analog Guitar Synthesizer Effects Pedal Monophonic analog guitar synthesizer with four octaves of vintage square wave synth tones. No-nonsense interface makes it easy to add or subtract octaves to create a wide variety of sounds without having to dial in envelopes or oscillators. Ripping sub-octave thump, pulsing octave down, a lightly squared base tone and a swelling transformer based octave up all join together to make a single guitar sound like an army of olde tyme synths. 9v Operation Small footprint, measures 4 5/8" x 2 1/2" x 2.25". Top mounted jacks.