Aguilar Tone Hammer Bass Preamp Direct Box Effect Pedal with Overdrive and 3 Band EQ with 18V Power Adapter and Instrument Cable Inputs/Outputs: (1) 1/4" Input, (1) 1/4" and (1) XLR Outputs Model: Tone Hammer Series: (2) 9V Batteries , Phantom Power or Power Adapter Controls: 3 Band EQ, Ground Lift Switch, Pre/Post DI Switch, Engage Switch, AGS Switch