This Pharmacia Biotech PhastSystem Electrophoresis Seperation and Control Unit is used condition and is guaranteed to be fully functional. This item came from a local lab that had surplus lightly used equipment. We urge customers to view all photos as they show overall condition, included accessories, and functionality. Please feel free to contact us with any questions. Please Note: The back of the unit has three screws securing cover. The reciebing end of two of these screws is broken and wll not tighten. As a result the cover can be opened slightly. This issue should not affect functionality in any way but has been reflected in the list price.