Panasonic SLZ73CB is a great projector for engineering use, with lumens of 5400, and resolution of 1920*1200, adopting 3LCD projection technology. It is equipped with 3 x 0.63 inch chips and a light source of Ultra high pressure mercury lamp, lamp lifetime is 4000 hours under normal mode. The contrast ratio is 10000:1, image size is 40-100 inches.