The Morley Steve Vai Bad Horsie Wah Pedal is set to Steve's precise specs and equipped with Morley's superior electro-optical circuitry to handle the heavy wah. This effects pedal is switchless for easy use. You just step on the pedal to engage wah and step off to bypass. Special buffer circuitry prevents signal loading, gives you superior wah tone, and drives long cables. LED indicator and easy-access battery compartmentPlease message us if you have any questions.