It is now more important than ever to stretch your budget dollars, so theyre designing features that reduce operating costs & extend the life of your presentation projector. The WD3300U WXGA projector introduces the color wheel & lamp drive systems that do just that. This DLP projector shines at 4, 000 lumens & 2300:1 contrast for large auditoriums, lecture halls or other venues where you need to project to a very large screen.