ACCO Apollo Open-Head Series 3000 Overhead Projector with 3000 lumens of brightness features double Fresnel lens which assures edge-to-edge sharpness and brightness. The projector is ideal for medium-sized classrooms and conference rooms. It features a Hi/Lo lamp switch that extends lamp life and reduces brightness for smaller rooms. Overhead projector features a large EYB lamp 11-1/4" x 11-1/4" stage glass, which allows the use of transparency sheets from edge to edge, making it an excellent solution for larger groups and rooms. Projector includes lamp changer that reduces burn-out delay and a fold-down arm that accepts optional film roller attachment and dust cover.