I am also listing this on other sites. I apologize if it sells out due to a discrepancy. This is an acoustic guitar preamp, the ADI21. I bought it used and used it in my room 2-3 times. I am selling it because I am changing my equipment. It had minor scratches, etc. from the time of purchase. It may not be considered a beautiful item, but there are no problems with its use. Please consider it as player's condition. This is a listing for the main unit only. I will include batteries for operation check. Thank you. - Model Name: ACOUSTIC ADI 21 - Brand: BEHRINGER - Function: Acoustic Modeler/Driver - Controls: TREBLE, MID, BASS, LEVEL, MID FREQ, BLEND - Input Terminals: 6.35mm jack - Special Notes: Power adapter terminal available Thank you for viewing.