The acer u5320w is an ultra short throw projector that can be placed as close as 23cm 91 inches from the projection surface and the ability to can project up to 100 inch images at a distance of 50cm 197 inches providing greater space flexibility it also eliminates shadowing and enhances viewing comfort a significant benefit for classrooms the u5320ws wxga resolution and 3 000 lumens brightness creates crystal clear and vibrant images while its 2x10w speakers provide powerful sound