The Chorus Ensemble CE-5 delivers a variety of tones, with adjustable E.LEVEL, RATE, DEPTH, and FILTER controls. My father used this about 30 years ago. It has been stored for many years, so the box has some dust on it. - Model Name: Chorus Ensemble CE-5 - Output Type: A (Mono) and B - Control Knobs: E.LEVEL, RATE, DEPTH, FILTER - Included: Original box Thank you for looking.