This Wave Biotech BASE2050EH 20/50EH Bioreactor Rocker Base is in good condition, has been tested and is guaranteed to be functional. This unit came from a local lab that had surplus equipment. We urge customers to view all photos as they show overall condition, included accessories and useful information. Listing only includes what is shown in photos. Sale of unit comes with a 30-day full money back guarantee return policy. We will be happy to provide additional information as well as photos so please feel free to contact us with any questions.