The acer s1283e projector displays image at least 80 inches in 1 m distance and delivers 3d imaging with 144 hz speed rate and high brightness with dust shield solution this projector can prevent dust impact on projectors and extend lifespan of usage dust accumulation inside the projectors may cause shutdown and brightness decay acer brings dust shield solution in projector products the cutting edge technology protect projectors from damage caused by airborne dust and sand to adapt di