Optoma EH330UST Ultra Short Throw 3D DLP Projector - 1080p - HDTV - 3600 LumenEnhance presentations and events with colorful and bright 3,600 Lumens 1080p images from the Optoma EH330UST. Its 20,000: 1 contrast ratio and ultra short throw ratio display sharp 100 inch images from inches away perfect for space constrained environments such as small classrooms, meeting rooms, boardrooms and digital signage applications. A PC free image viewer and document reader display office documents, PDFs and images from USB storage devices.