The Acer S1283e projector displays image at least 80 inches in 1 m distance & delivers 3D imaging with 144 Hz speed rate & high brightness. With dust shield solution, this projector can prevent dust impact on projectors & extend lifespan of usage. Dust accumulation inside the projectors may cause shutdown & brightness decay. Acer brings dust shield solution in projector products. The cutting-edge technology protect projectors from damage caused by airborne dust & s&. To adapt different regions or dusty environments, Acers dust resistant projectors offer four guards-sealed engine, vertical board, 3D dust filter & lens shield-to secure projectors to enhance performance in the long run. ** Main Features** * XGA (1024 x 768) resolution. * Acer Smart Format technology. * 3100 Lumens, 13000:1 contrast ratio. * Constant brightness technology. * Acer Color Safe II technology. * Built-in 10 W speaker. * Acer Cloro Boost II+ technology. * Acer dust-shield solution. ** Flexible Setup** * Short-throw projection. * Acer top-loading lamp design.