Thanks to a built in sensor & newly developed software, the projection white screen allows it to be written on with a built-in infrared light pen while using a PC. SHORT THROW PROJECTION FROM ONLY 34 INCHES AWAY The PLC-WL2503 can project a full 80-inch diagonal image from a distance of only 34 inches. Teachers can project images onto the screen & produce no shadow on the screen. This means they can use large images even in relatively small rooms. WXGA, FITS A VARIETY OF APPLICATION SITUATIONS Offering a wide XGA 1280 x 800 (16:10) resolution, the PLC-WL2503 makes it possible to project HD images with easy connection from your DVD player via HDMI terminal. NETWORKING CAPABILITY The PLC-WL2503 is equipped with SANYOs exclusive PJ Network Interface for wired networking, a common feature among SANYOs extensive line of commercial projectors. Networking allows the monitoring of projector functions & operation from long distance via a web browser, allowing e-mails to be sent automatically to report operating status. NEARLY MAINTENANCE FREE This projector offers long periods (4, 000 hours in ideal condition) of maintenance-free use without the need for lamp & filter replacement. The PLC-WL2503 is equipped with SANYOs proprietary hybrid filter, composed of multiple filter layers, & the lamp lifespan has been enhanced. This longer life span saves your valuable time & money on maintenance. EASY ON/OFF FUNCTION The power turns on as soon as you connect the power cord. No need to press any buttons on the remote control or projector. You can also disconnect the power cord as soon as the power is turned off. BLACKBOARD, COLOR BOARD MODE In classrooms & other places where there is no screen available, images can be projected onto the blackboard or colored boards. This enables quick setup when making presentations or calling a quick meeting. Sanyo PLC-WL2503 Interactive Short Throw Projector, 2500 Ansi Lumens, Wxga, Hdmi, 2 Xvga, Network, Long Life Filter, 10W Speaker, currently comes with free wall mount/boom arm*