The Happy Nerding FX Aid Pro is one of the best multi effects in eurorack and is constantly getting new algos and effects added. You can swap in and out what you want on the module and the screen on the pro model makes using the module much better than the smaller version of the fx aid. The module is dusty in the pic but is in perfect working order. Fast, reliable shipping. May have the original box but if not will be sent safely and fast. Happy bidding!