Necs um351w is a 3500 lumen ultra short throw projector that packs a multitude of features while delivering an extremely short throw distance for education and corporate applications with its ability to be mounted to the wall directly above the screen on which it projects this model helps eliminate the shadows and glare typically found with standard projection systems the um351w includes a powerful 20w speaker closed captioning and rj 45 for remote management over a network and its input p