Funcionando perfeitamente.The Dyna Comp Compressor can tighten up your signal, add rich sustain, or create the percussive and clicky sound heard on numerous hit records.This pedal can be powered by a 9-volt battery, a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included).