More Interaction Less Energy Use A wide array of connectivity options plus PointWrite™ and QWrite interactive features (optional) make the MX819ST a complete classroom projector solution. An 0.61 short-throw ratio 12000 1 sharp contrast ratio 3000 ANSI lumen brightness and long lamp life ensure vibrant reliable visual performance time and again. KEY FEATURES . World-Leading SmartEco TechnologyBlu-ray Full HD 3D SupportedShort-Throw Projection0.5W in Standby ModeLAN Control with Crestron and PJ-Link. .