"SPS" (Safety Protection System) package: electronically controlled, transparent safety shield in the feed opening; "Easy Switch" control element uses color codes and back-lit symbols to indicate operational status; automatic stop when shred bag is full or when cabinet door is opened; automatic reverse and stop in case of paper jam; double protection against overheating automatic start and stop controlled by photo cell high quality, hardened steel cutting shafts take staples, paper clips, and credit cards 10 year warranty on cutting shafts quiet and powerful single phase motor fully enclosed, dust-proof gearbox housing high quality wooden cabinet mounted on casters environmentally friendly reusable plastic bag 9 1/4 gallon bin capacity