Purchased new about a month ago and used only indoors for a short time (non-smoking environment). I think it's a very easy-to-use compressor. It has a switch on the back to turn the original sound ON/OFF, and a switch for buffered bypass ON/OFF. I think it's great that it can also be used for saturation and overdrive. I like it, but I'm selling it to organize my equipment. There are almost no scratches. It is fully functional and comes with everything, including the box. Thank you. Compact 1176 studio compressor, perfect for sound quality adjustment. - Model: 1176 - Type: Studio Compressor - Controls: INPUT, OUTPUT, ATTACK, RELEASE, RATIO - Accessories: Original box - Features: Compact design Thank you for viewing.