I am selling this item because I purchased new equipment. This is a listing for the main unit only. I have confirmed that it powers on and functions without any issues. Please check the photos for signs of wear and tear. This is a bass preamp equipped with a virtual tone shaper function. - Model Name: BASS ATTACK - Brand: Hartke - Function: Virtual Tone Shaper Preamp - Control Knobs: 6 knobs (including Shape) Thank you for looking.