&lt;b&gt;Ultra short throw lens can make 100 inch projection screen from as little as 44cm away&lt;/b&gt;&lt;br /&gt;&lt;br /&gt;The DW770UST is the ultimate ultra-short-throw projector for the education with 3500 lumen of brightness and WXGA resolution . The projector offers a 100 inch diagonal 2.15 metre wide projection image from as little as 44cm away from the screen surface. As well as delivering an optimal viewing experience the DW770UST ensures a high sound quality thanks to in-built 2x10W speakers. For added user convenience the DW770UST feature integrated network monitoring and management solutions including those from Crestron RoomView as well as others.