The perfect presentation tool by BUHL. Outstanding clarity with larger 10.5" x 10.5" projection stage. It features a dust free sealed head, with a high resolution singlet lens. Rack and Pinion head focusing adjustment. It has a Fold down arm for easy transport. Color-tuned balanced optics to eliminate blue and brown corners. Lamp safety switch to disconnect power when changing lamps. Top mounted power switch. Extra Bright FXL 410 watt lamp with 4000 ANSI Lumens and 75 hour lamp life. UL listed.