Perfectly working industry standard SSL bus compressor. Some light bulbs inside of some of the buttons blew up. It never bothered me, but those bulbs are available and you can replace them if you want. This compressor is one of the best choices for master bus, music bus, drum bus, and is also great for tracking pianos, drums, synths and other things. This box is a really solid construction with proper electronic components inside, not the cheap computer surface mount technology found in modern days SSL products. Collection from London or I can post insured.