The Fotodyne Foto/Prep I UV Transilluminator Model 3-3500 is designed specifically to meet the demand of preparative DNA electrophoresis. The cover can be positioned up to 90 degrees, which allows easy access to gel, built with a two-position control offering you both preparative and analytical mode. It features the safety of build-in adjustable UV blocking cover to shield you from UV exposure while observing a gel or cutting out bands.