This Markbass Compressore is a tube-based compressor pedal with a full array of control knobs, in virtually mint condition, and it comes with the Markbass power supply and the original box. This pedal works great with bass, guitar and keyboards...really any instrument that could benefit from a very good and versatile compressor. There is an excellent review from Ovnilab here...this will give you a lot of real life information about the pedal...it's one of the reviewer's favorites. Markbass Compressore I am asking $125 for the Markbass Compressore, plus $15 for CONUS shipping. Please let me know if you have questions or need additional information, and thanks for reading my ad. Trades: Keeley Bassist, Keeley Compressor Pro, Hyper Luninal. All +\- $ as needed.