NECs 5500-lumen PA550W is a widescreen, advanced professional installation model that appeases corporate & high education users. With integrated RJ45, high-speed wireless LAN & a multitude of simple-to-use asset management technologies, the PA550W helps users present seamlessly without worrying about their technology. The industrys first built-in stacking correction capabilities allow the projectors to boost an images brightness up to 22, 000 lumens, which is ideal for larger-sized screens & environments with heavy ambient light. This feature also prevents the complete loss of an image, which can happen when using only one projector.