From Dunlop:

MXR EVH 5150 OVERDRIVE

EVH5150

The EVH 5150 Overdrive features multi-stage MOSFETs, a 3-band EQ, a Boost switch, and a noise gate for a versatile range of OD and distortion tones.

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).