Compression effect pedal capable of creating a variety of sounds. - Model Name: Compression Sustainer CS-3 - Color: Blue - Control Knobs: LEVEL, ATTACK, SUSTAIN - Power: 9V battery or AC adapter - Input Terminals: Standard jack - Output Terminals: Standard jack Thank you for viewing. I purchased this item new. It shows signs of use, but it works. Please purchase only if you understand that this is a used item.