Optoma EX531: Experience vivid presentations with 2600 ANSI lumens and a 2500:1 contrast ratio. TrueVivid technology ensures lifelike colors, while 1.07 billion display colors offer stunning visuals. Project images up to 302.85 inches with a throw ratio of 1.95 ~ 2.15:1. Connect to various sources via VGA, S-Video, Composite, and Audio inputs. Control the projector remotely via RS-232 or directly with the projector ID. Enjoy a long lamp life of 4000 hours (STD mode) and a built-in 2W speaker for clear audio.