Aguilar Tone Hammer 3-Band Preamp/DI, Stomp Box, Overdrive Bass Pedal w/ 4 Cables 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