The Rotovibe is a chorus/vibrato effect that can simulate rotating speaker sounds popularized by Hendrix and many others

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. A mainstay on Zakk Wylde's pedalboard. Power: Dunlop ECB003 AC Adapter or Single 9 volt battery

Dunlop JD-4S Rotovibe Expression Pedal Features:

• Vibrato and chorus modes
• Footpedal control of modulation speed
• Knob control of modulation depth
• LED modulation speed indicators
• Effect on/off switch
• Standard 1/4" input-output
• Powered by the Dunlop ECB-003 AC Adapter and/or 9-volt battery