Epson EB-684Wi HD Ready Pen-Interative Projector (V11H741040) - Screen Size: 70-inches, Resolution: 1280 x 800, Brightness: 3500 Lumens, Contrast Ratio: 14 000:1, Aspect Ratio: 16:10, Wireless LAN IEEE 802.11b/g/n (optional), Connectivity: 1 x USB 2.0 Type A, 1 x USB 2.0 Type B, RS-232C, Wired Network, , 2 x VGA in, 1 x VGA out, 3 x HDMI in, 1 x Composite in, 2 x RGB in, 1 x RGB out, 1 x MHL, 1 x Stereo mini jack audio out, 3 x Stereo mini jack audio in, 1 x Microphone input, Sync. in, Sync. out, 1 x Built-in 16W Speaker