A booster effect pedal that improves sound quality with simple operation. Operation confirmed. Immediate purchase available. This is a used item, so please understand that no returns or exchanges are accepted. Includes the main unit only. - Brand: Providence - Model Name: FINAL BOOSTER - Type: Booster - Input/Output Terminals: Output jack, DC9V jack - Switch: Footswitch - Control: BOOST knob From the manual: "●PROVIDENCE/FINAL BOOSTER is a full-range booster. It incorporates a VITALIZER circuit, which brings out the characteristics of the instrument while producing a unique boost sound. Even when the effect is off, the signal passes through the VITALIZER circuit, sending a lively signal to the equipment connected after the FINAL BOOSTER. [What is VITALIZER®?] VITALIZER® was developed to prevent sound quality degradation that occurs within guitar and bass systems. VITALIZER® has the characteristic of changing its characteristics according to the output circuit of the guitar itself, so it transmits the signal without degrading it, while preserving the individuality of the guitar." #CleanBooster