The Visual Sound GarageTone Chopper Tremolo pedal nails the trem effect with near perfection at an incredibly low price. The Chopper Tremolo pedal uses an expensive opto-isolator and carefully designed analog circuitry to work its sonic magic. In addition to the usual Speed and Depth controls, the Chopper Tremolo also has a unique Wave control that alters the overall feel of the effect. Last but not least, there"s even an LED that blinks in time to the tremolo stompbox"s speed.Speed knob Depth knob Footswitch LED