-------------------------------------------- BamBasic Opto Compressor This is the BamBasic Opto Compressor. No issues, operation confirmed. Comes with the original box. I owned it as part of my collection, but I rarely used it. I'm offering it for sale to someone who needs it. If you purchase it with other items I have for sale, I will offer a discount to reflect the reduced shipping costs and easier packing/shipping. Thank you! It's an opto-type compressor using a photocoupler, with a fully analog studio-quality design. With its simple two-knob operation, you won't have to worry about setting numerous parameters or be bothered by complex operations, allowing you to output the optimal sound with easy operation. You can use it lightly to even out the sound pressure and attack, adding a tight groove to cutting and rhythm, or use it more strongly to create thick lead tones and riffs with a sense of overtones and compression, all with low noise. It can also be used constantly to naturally even out the touch. Top LED lights up blue when ON Bottom LED changes to red depending on the compression level "Compress" Adjusts the strength of the compression "Volume" Adjusts the volume to an appropriate level --------------------------------------------