Optoma W320UST WXGA Video Projector 4000 Lumens Full 3DThe W320UST, is perfect for businesses, schools and colleges. It is bright 4,000 Lumens and a throw ratio of 0. 27: 1 means that it can project a 100 image from less than 24 inches away. And having the projector installed so close to the screen avoids any shadows being cast across the screen from the presenters. Specifications Bright projection 4000 ANSI Lumens WXGA resolution, 20, 000: 1 contrast Ratio 2x HDMI input and 16W Audio Crestron room view