A wah-wah at the fingertips ! Used by Reeves Gabrels (David Bowie) and Joe Perry (Aerosmith)! Active circuit to easy install in every guitar without modification. Push-pull switch with a un preampl/ parametric that gives you the exact ´68 wah-wah sound. Idéal for sustain and controlled feedback. This circuit is included in the Gibson Les Paul Joe Perry Signature.