Operates on 9V battery

Buy at www.musicianscart.com Jim Dunlop MXR M81 Bass Preamp Effect Pedal,Switchable pre-post EQ direct out get the right tone for your amp and the room,High headroom input and output level controls for distortion-free signal,3-band EQ section with sweepable midrange dials in whatever you need,Buffered bypass-True bypass switchable for even greater versatility,Operates on 9V battery, optional power supply, pedalboard power, or phantom power from your mixer