ART CoolSwitch A/B-Y Switch Instrument Pedal with Footswitch A and B LEDs illuminate to indicate selected signal routing. Both LEDs illuminated indicates Y routing. Dual footswitches permit selective A/B switching or the combining of both A&B as with a Y adapter. Dual common jacks permit connecting something in parallel with the input source - such as a guitar tuner. 9V Battery included. Dimensions: 3.75 x 2.5 x 1.5 inches (90mm x 63mm x 40mm)