MXR® WYLDE AUDIO PHASEWA90This pedal adds dimension and dynamics to Zakk Wylde's legendarily blazing solos and razor sharp leads.This pedal is powered by a single 9-volt battery (remove bottom plate to install), a 9-volt AC adapter such as the Dunlop ECB003, or an MXR Brick Series power supply.Effect Pedal for Electric GuitarPhaserProvides dimension and dynamics to leads with a rate controlAdjustable from a slow grind to a thumping pulse or use it like Zakk at the 9 o'clock position for a slow, burning sweep