1976 MU-TRON Bi-Phase Effect w/Paper Overlays - UsedDescribed as the world's first dual phasor, the Mu Tron Bi Phase consists of two separate 6 stage phasers and two corresponding oscillators. Each circuit contains some additional tonal controls, allowing for versatility and person in generating this unique effect. Includes an A B footswitch to activate both phase circuits and three different paper instruction sheets, outlining how the user can create two speed, super, and or stereo sweeping effects.