ViewSonic LS831WU 4500-Lumen WUXGA Ultra-Short Throw Laser DLP ProjectorDescriptionSpecificationsShipping ViewSonics LS831WU is an advanced 4,500 ANSI Lumens WUXGA ultra short throw installation projector perfect for public and commercial display applications. With a 0. 25 throw ratio, users can easily get 100 screen from only 21 cm away. Screen size can further be expanded to up to 150" at a lower cost per inch compared to commercial displays. Adopting the 2nd generation laser phosphor technology, it offers consistent