This is the legendary CPR-1 compressor, the original. In addition to its highly-regarded sound, what's amazing about this item is that the body, box, and accessories are all preserved in excellent condition. I purchased this after searching for a CPR-1 in good condition, following advice that a good compressor is a must-have, but I have no plans to use it in my music. I've been keeping it as part of my collection, but I'm now putting it up for sale. While they rarely come up for sale, even when they do, they often have a lot of scratches or are just the unit itself. This one is in exceptionally good condition. However, it is a used item, so please check the photos for the condition. Thank you. The following is an AI-generated description: Yellow Diamond Compressor effect pedal. Features COMP, EQ, and VOLUME control knobs. - Model Name: Diamond Compressor - Color: Yellow - Control Knobs: COMP, EQ, VOLUME - Country of Manufacture: Canada - Serial Number: S/N 6824 Thank you for looking.