Caline's Pressure Tank is a natural sounding compressor, that will do it all from chickin' pickin' squish to power chord and solo boosting and leveling. Compressors are the hidden gems of effects, a useful tool to clarify single note attack and even out chord stomps.Level, EQ, Comp ControlsTrue BypassSuper Solid Metal CasingUses 9V Battery or Standard Boss Style Adapter (not included)