Electro-Harmonix LPB-1 Linear Power Booster Preamp Pedal Small die-cast case saves valuable pedal board space Put this little monster in line before any effect to provide boost and definition Improves the gain and saturation of your amp The Nano LPB-1 Power Booster gives your sound presence! Housed in a compact, die-cast box with rounded corners to save valuable pedal board space 9V DC power jack