Designed for disruption-free learning in small-sized classrooms, the MX850UST offers a 81" XGA picture in only 0.74 meters with a 0.4 ultra short-throw ratio. Together with 13000:1 ultra-sharp contrast ratio and 2500 ANSI lumen brightness, this projector has the most dynamic image quality to offer!World-Leading SmartEco Technology<0.5W Standby Power ConsumptionUpper Lamp Door for Easy Lamp AccessLAN Control with Crestron and PJ-LinkMicrophone Input Support