Optoma EH502 is designed to deliver unsurpassed performance and reliability to meet your installation needs. Its powerful 5,000 lumens output and impressive 15,000:1 contrast ratio deliver remarkably bright presentations with sharp text and color-rich graphics. To ensure it will perform to your needs, the EH502 features a comprehensive I/O panel and advanced features. HDMI for digital connectivity, over-the-network presentation capability, wireless presentation capability via optional USB dongle, vertical lens shift and discrete audio inputs including microphone input for maximum installation convenience.