Electro-Harmonix Nano Signal Pad Attenuator The Signal Pad is a passive attenuator that allows you to instantly switch to a different preset volume. It's like your guitar's volume knob, with a fully-passive and color-free circuit. Leave your amp's volume set high for overdrive, and use the Signal Pad to lower your level for a clean sound -- then switch it off to kick in your amp's natural overdrive. You can also experiment with the Signal Pad anywhere in your effects chain -- you'll bring out new tonal combinations from your favorite old pedals. Features True bypass - Turn any single channel amp into a 2-channel setup - Switch from lead to rhythm on the fly - Use in front or after any effects to change the tone of that effect - Battery Powered LED power supply (not included)liul