The Rotovibe Chorus/Vibrato features Vibrato and Chorus modes and rocker-controlled effect speed to create expressive rotating speaker effects with LED speed indicators. This is a very expressive effect thanks to its built-in real-time control. Choose either Chorus or Vibrato, adjust the intensity of the effect, and then control the effect's speed by rocking the pedal back and forth. • MFSKU JD4S • UPC 710137006492