This Amp in a box Preamp-Distortion brings a complete amp feeling to your pedalboard. Just between the VeJ2 and VeJ4, this pedal brings three dynamic distortion modes for the more aggressive metal tones. With a full EQ and very low noise, it sounds great on clean channel or directly in the FX Loop return of any amp. Power consumption : 18mA Voltage : 9Vdc center negative.