Overhead Projector. Made by Buhl.The educators" choice for general classroom use. Constructed of high-impact molded plastic-split case design for easy maintenance access and durability. Dust free closed head design, with single lens. Balanced optical system (14" focal length) provides superior edge to edge resolution. Rack and Pinion focusing - 10" x 10" stage provision for optional roll attachment, side to side or front to back. 3 wire AC cord safety interlock switch- UL/CSA approved uses 360 watt EYB which provides 2200 Ansi Lumens and 75 hours of lamp life. The 9014EDC unit adds a lamp changer to allow lamp changes from burnt to fresh without presentation interruption. (Only one lamp provided). Limited lifetime warranty.