This is the newest version with Tough and Suave modes, selectable via internal dip switches. This is a GREAT compressor in super duper condition and it was a difficult decision for me to sell it. Currently the Smoothie is not available from OvniFX so here's your chance. Comes with original purple box and case candy, which I do not have pictures of at the moment. Also comes with attached velcro, cut for easy access to the screws, and at no extra upgrade charge. Winning! Free shipping to CONUS only. PayPal accepted. Website: OVNI Effects {} {} From the OvniFX website: The new optical ones have essentially the same tone and action as the OTA originals, apart from these details: It uses a charge pump to boost the 9V supply to a higher internal voltage, to reduce the chance of clipping, for you players with high-output basses. With the new Opto models you can get a serious dip-and-swell effect at the maximum setting of the Sustain knob. Lower settings get a more natural and unobtrusive action. Initially we released two Opto versions: "Tough" and "Suave". The Suave ones softened the compressor's reaction to the initial peaks of your notes, which gives a little more transparent-sounding action and reduces any artifacts. The Tough ones responded to your note attack more strongly and quickly, which gives the start of the compression more of a funky character. They are otherwise the same. Those versions are now permanently retired, because we have a newer version that incorporates both models! It includes interior DIP switches to toggle between Tough, Suave, and two "in between" positions, for a tremendous range of versatility and fine-tuning to your taste. This new one is the only version available. The OVNIFX Smoothie compressor is packed with features such as clean blend, tilting EQ, super low noise, very wide frequency range, and an LED to indicate the amount of compression.