More Interaction Less Energy Use A wide array of connectivity options plus Point Write™ & QWrite interactive features (optional) make the MW820ST a complete classroom projector solution. An 0.49 short-throw ratio 12000 1 sharp contrast ratio 3000 ANSI lumen brightness & long lamp life ensure vibrant reliable visual performance time & again. KEY FEATURES. World-Leading Smart Eco Technology Blu-ray Full HD 3D Supported 0.61 Short Throw Lens 0.5W in Standby Mode LAN Control with Crestron & PJ-Link..