Table Top Transmissive Plastic Cas OHP with the following specification:1.Foldaway arm and head2.Aperture:285x285mm(11-1/4x11-1/4)3.Lens:1-element,3-element4.Focal Length:f=290mm, f=300mm5.Tilting Angle: 0-55 degree6.Head Rotation: 360 degree7.Power: AC 110v,220v,240v, 50/60Hz available8.Lamp: EHJ 24v 250w ,EVD 36v 400w , Dual Sockets/Dual Lamps9.Condenser10.Color Correct11.Brightness Switch12.Illumination(Central Lumen):3300+,3000+,4000+13.Cooling:Foreced Air Cooling14.Interlock15.Overheating Thermostat16.Net Weight:8.9kgs,9.0kgs,9.7kgs17.Dimensions:370x380x285(755)mm