Designed for disruption-free learning in small-sized classrooms, the MX842UST offers a big screen in short distance with a 0.47 ultra short-throw ratio. Together with 13000:1 ultra-sharp contrast ratio and 3000 ANSI lumen brightness, this projector has the most dynamic image quality to offer! Designed to help ensure a fail-proof projector installation, BenQ has implemented extra help into its wall mount design. This installer-friendly ultra short-throw projector wall mount features an installation chart and a measuring ruler to help you find the most suitable projector-screen alignment and image position for your classroom. Offering lower TCO and optimized projection through dynamic power saving, uncompromised brightness, exquisite picture quality and optimized lamp life -SmartEco Technology has perfected what a DLP projector can do. With this innovation, schools and corporates are able to save up to 70% of lamp power consumption and lower maintenance costs through dynamic power saving features while bringing an ultra-vivid viewing experience into every presentation. By detecting the input content to determine the amount of brightness required for optimum colour and contrast performance, the SmartEco Mode is able to reduce lamp power while delivering the finest image quality. No compromise! The Eco Blank Mode, which lowers power consumption up to 70%, can be used to blank the projection screen when the projector is not in use, in turn eliminating distractions in class and redirecting students' focuses back on the teacher. The No Source Detected Mode, which can be set to enter the Eco Blank Mode after three minutes of inactivity or to the Auto Power Off Mode after no display source has been detected for over 30 minutes, can keep the projector from running with full lighting power. You don't need a big room or a lot of free ceiling space to create a big picture when you've got an ultra short-throw projector! Teachers can think outside the box to turn every corner into the perfect place for educational use. An ultra short-throw projector can be placed close to the screen in front of the class and well out of students' way, greatly decreasing the occurrences of shadow disruptions. Teachers can enjoy teaching without worrying about the class being interrupted. An ultra short-throw projector keeps the projector light from shining directly into everyone's eyes. The intensity of the projector beam may be potentially harmful. So it's for the best to keep it out of the way. BenQ MX842UST is built with latest DLP technology to support 3D functionality, allowing schools to bring an immersive learning experience to their students with a simple preparation of 3D glasses and 3D content.