Designed to keep high end wine for a prolonged amount of time. Good for a restaurant that wants to offer a few high end BTG offerings that you want to keep fresh longer. 4 bottle unit, has not been used for a few years. “As is” for $125 firm , nitrogen bottle not included. (Nitrogen bottles can be rented from air liquid) worked perfectly when we stopped using it. Parts available via the wine keeper web site. Or $350 if I clean it and make sure all the seals are good, and replace the non working light bulb.