A super-clean Mesa/Boogie Flux Five Overdrive/EQ pedal. I used to sell Boogie amps and this pedal sounds EXACTLY like a Boogie through my Fender Twin! The 5 band EQ allows a WIDE range of tones - from a light, "pretty" overdrive to the thick low-end distortion with upper end bite Boogie's are known for. As used by John Mayer. REALLY well-built pedal with nice touches you don't see on most pedals.