The RC Booster by Xotic Effects is an effects pedal that allows for adjustment of volume, bass, and treble. - Model Name: RC Booster - Brand: Xotic Effects - Features: True Bypass - Controls: Volume, Bass, Treble - Input/Output Terminals: 1/4 inch jack - Power: DC 9V Thank you for viewing. There are no operational issues. Please note that this is a used item and is sold as-is, with no returns or exchanges.