The OPTOMA's W318ST 3500 lumen WXGA short-throw DLP projector, you can reduce the chances of shadows crossing your presentation. The short 0.52:1 throw ratio will allow you to set it about 11' away from your screen and still get a 300" image. Its 3500 lumens of brightness and 20,000:1 dynamic contrast ratio will make images appear bright and crisp in a variety of settings, while its native resolution of 1280 x 800 will ensure that no detail is lost in huge projects. The W318ST offers VGA, composite video, and two HDMI inputs to enable a wide range of devices; one HDMI input is MHL-compliant, allowing user to stream from a compatible mobile device while also charging it with a single connection. The VGA output allows user to daisy-chain the image to another projector or display, and the analogue audio input and output allow to do the same with your audio.