The MXR SUPER COMP is a compressor effects pedal with three knobs: OUTPUT, ATTACK LEVEL, and SENSITIVITY. - Brand: MXR - Model Name: SUPER COMP - Control Knobs: OUTPUT, ATTACK LEVEL, SENSITIVITY - Switch: Footswitch - Input Terminals: INPUT jack - Output Terminals: OUTPUT jack - Design: Black metal case It's an easy-to-use compressor! Get it if you want it!!(´д｀)