The Optoma TW631-3D business and education projector brings the finest images to schools and businesses. High contrast ratio ensures easy-to-read text and high brightness makes for excellent graphics even in rooms with ambient light. This DLP projector integrates the features that businesses want (HDMI connector and 3D compatibility) and supports larger audiences with a built-in 7-watt speaker system. A top-loading lamp design streamlines maintenance and saves time. An added built-in closed captioning decoder displays text from videos that have closed captioning embedded in the signal without requiring additional components.