How you doing, this is a Revive Audio-modified bus compressor from Chameleon Labs. It has L and R channels, making it a stereo compressor. There are some scratches and general wear on the top and bottom paneling, hence the ‘good’ condition. It has been extensively upgraded by Revive Audio; message for questions on that. This compressor sounds wonderful; it is easy to hear the compression engage even at a low ratio like 2:1. the threshold can be dialed back so that the compression is as gentle as you’d like it to be, or inversely, more aggressive. I am selling it because I am looking to obtain a higher-end 30-channel summing mixer, and I won’t have channels available from my converter to use this comp. My loss is your gain! Let me know if you have questions.