ViewSonic PA503SE Business Projector (PA503SE) - Brightness: 4000 ANSI lumens, Contrast Ratio: 22000:1, Resolution: 800x600, Connectivity: Input: Computer in (share with component): 2, Composite: 1, Audio-in (3.5mm): 1, HDMI: 1 (Back), Output: Monitor out: 1, Audio out (3.5mm): 1, Speaker: 2W, Control: RS232: 1, USB type mini B (Services): 1