Used item. Operation confirmed. I believe there are no noticeable scratchy noises. Cleaned. *Tape residue present. *There are scratches from use, but there are no problems with usage. Recommended for those who understand used items and those familiar with the equipment. *This is a description found online. I hope it helps. BOSE Model number: 1705 2 ・The entire body case uses aluminum die-casting, which is used as a heat sink. A simple, compact 2-channel power amplifier that is also popular for professional use. It is a simple, compact 2-channel power amplifier that is also popular for professional use. It is equipped with slide volume controls that allow independent volume adjustment for left and right channels. It incorporates a dedicated equalizer circuit that best drives the 101 series, and has the same width as the 101MM, with a compact size of 60 millimeters in height. It uses a strong aluminum die-cast body with high heat dissipation.