Overhead Projector. Made by Buhl.Our fully featured top of the line performance portable projector. Dust free closed head design with a high resolution lens. Rack and Pinion head focusing adjustment. Color tuned optics to eliminate blue and brown corners. High - Low lamp intensity switch. Built in Lamp changer easily switches to spare lamp (only one lamp supplied). Safety switch disconnects power when changing lamps. Fold down arm for easy transport. Uses ENX 360 watt with over 3000 ANSI Lumen lamp. 75 hour lamp life. 10.5" x 10.5" stage. UL listed limited lifetime warranty.