"Technical Data at a glance Optical system Excellent contrast through uni-focal single element 90mm objective Clear Fresnel-lens,Projection platform 250 X 250mm Features Built-to-last,sheet metal chassis offers structural and durability un-matched. Projector equipped with Twin halogen lamps with a lamp quick-Changer which can be easily perated from outside. Should a lamp fail during a presentation the spare lamp can be quickly utilized with simple turn of the Knob. The projector does not have to be opened. Fine focusing with rack & pinion mechanism. Halogen lamp 2X24V/250W . Economy switch DIM / BRIGHT. Cooling throw cross-flow fan-maintains low temperature on the stage. Specialties Thermocol packing for safety during transportation and idle for repacking. Ready for operation within seconds Foldable projector arm Rotating projection head 360º,"