Buhl Overhead Projector Ergonomic Swivel Open Head 2200 Lumens - Buhl 9013ED Design - E-Z clean 360 degree ergonomic open head design, with single lens Focusing - Rack and Pinion focusing Stage - 10" x 10" stage provision for optional roll attachment, side to side or front to back Electrical - 3 wire AC cord safety interlock switch- UL/CSA approved Lamp - Uses 360 watt EYB which provides 2200 Anis Lumens and 75 hours of lamp life