dbx 166XL 1U Size Compressor/Limiter 2-channel compressor for professional sound adjustment. - Model: dbx 166XL - Number of channels: 2 channels - Functions: Compressor, Limiter, Expander - LED Meter: Gain Reduction Meter - Connection Terminals: XLR, 1/4 inch TRS It was installed in a rack used on-site. It hasn't been used for a while, so I'm selling it to organize my equipment. As shown in the photos, the various lamps light up. I haven't been able to check all the detailed functions, so it will be delivered as is. Since it's old, there are overall stains, scratches, and faded areas. The item is only the main unit (the power cable in the photo is for checking purposes). Thank you for viewing.