Reliable overhead projector in modern moulded plastic housing with collapsible reflector column. High quality optical system with correction to avoid coloured edges and highly efficient low noise cooling. Lamp: 36 volts, 400 watts. Aperture: 285 x 285 square millimeters approx. Light flux: 2200 lumens. Dimensions of housing: 450 x 440 x 320 cubic millimeters approx. Weight: 9 kilograms approx.