Overdrive pedal with Punch, Frequency and Smooth functions. True Bypass. Runs on 9v battery or external power. The Facepunch is a discreet transistor designed frequency selective boost pedal (unity to +20db) that has triode overload type of response to it. Perfectly matched to drive the front end of any tube amplifier to push it into extreme gainland via the signal level of the Punch control and the Frequency control to tighten or add back missing thickness in your tone along with a final Smooth control to adjust the very top end edginess.