Optoma TX631-3D XGA 3500 Lumen 3D Ready DLP Network Projector (Discontinued by Manufacturer) Share everything, from lessons to presentations, and deliver superior text and images - 3500 ANSI lumens brightness and 10,000:1 contrast ratio Easily add closed-caption content without installing additional components Streamline administration with network control and management via RS-232 or RJ45 ports Create a rich, engaging and vivid viewing experience with 3D capabilities