From Dunlop:

This Fuzz Face Mini Distortion features the same thick, smooth fuzz tones as the JHF1 in a smaller housing, with a status LED, AC power jack, and battery door for modern convenience.

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).