This is a vintage 1976 Roland AP-2 Phase II electric guitar phaser pedal. Features of this unique unit include controls for Rate and Resonance to manipulate both the amount of phase, and the shape of the sine wave, yielding a huge array of tones. Everything from a slight, slow-rolling phase to an intense, spacey tonal manipulation comes out of this versatile unit.
This particular example, seen in our pictures, is in perfect working condition, and operates flawlessly without any scratching, popping, noise or intermittence. Cosmetically, this pedal is in excellent vintage condition showing very few signs of wear or use. There are some scratches on the back plate, however this should be expected from any used pedal, no less one that is 34 years old.