Digitech EQ Effects Pedal, Regular (Mosaic) Turn any 6-string guitar into a 12-string. Battery operation possible; (Best with Polaroid 9V Batteries) Advanced, Polyphonic Pitch Shifting and Intelligent Doubling True bypass LEVEL - Adjusts the intensity of the 12-string effect TONE - Adjusts the amount of high frequency enhancement being applied to your signal Included Items: DigiTech Mosaic 12-String Polyphonic Effect Pedal PS0913DC Power Supply Online Owner's Manual and Warranty Registration Information Card