Guitar rotary effect pedal. Features: Dynamic emulation of the classic Vibratone Rotating Speaker. Easy to use 2-knob interface controlling intensity of speed and drive. Toggle switch lets you choose between vintage-sounding Chorale or Tremelo setting. True bypass for ultimate signal integrity.''Built-like-a-tank'' metal chassis. Runs on 9 V battery or PSU-SB DC power supply (not included). Connectivity: Input (6.3 mm jack), output (6.3 mm jack).