I am largely unfamiliar with Behringer DSP1100 Feedback Destroyer.  Please see the VIDEO to see the limited testing and to see details.  I am not equipped to test it further.  As shown, it powers up and is responsive to buttons being pushed.  The screen display is bright and clear. Cosmetically it generally looks ok, but it has some abrasions or scratches.  

Markings include:

• BEHRINGER
• FEEDBACK DESTROYER
• 24-BIT DUAL ENGINE AUTOMATIC FEEDBACK DESTROYER
• PARAMETRIC EQ
• MODEL DSP 1100
• 71083635 (serial number)
• Date Code:  018
• MIDI     OUT THRU  IN
• DUAL ENGINE PROCESSOR
• 20 BIT AD/DA CONVERTER
• 48KHZ SAMPLING RATE

It will come with a power supply cord. What you see is what you will receive - nothing more or less.  Comes with a 30-Day Return / Refund Policy in case it doesn't meet your needs.

Thank you for looking at my listing. If you have any questions or need more information, please feel free to contact me. While I am unfamiliar with this equipment, I will answer what I can.  I will respond as soon as possible.  

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