The ViewSonic PJ551D projector delivers amazingly crisp digital images at qualities only a DLP projector can achieve. Weighing in at just 2.8kg with 2200 ANSI lumen's and a 2500:1 contrast ratio, this portable projector makes it easy to give multimedia lessons in the classroom or dynamic presentations in the boardroom. Multiple preset presentation modes, an increased 40 degree digital vertical keystone correction and optical zoom ensure the best possible image regardless of location. With up to 4000 hours of lamp life, low cost replacement lamps, filter-less design and a non-degrading DLP light engine, the PJ551D has one of the best "Total Cost of Projection" ratios in the industry. The PJ551D makes giving presentations enjoyable for educational and business users alike.