The X319UST, is perfect for businesses, schools & colleges. It is bright & its throw ratio means that it can project a 100" image from shorter distance. & having the projector installed so close to the screen avoids any shadows being cast across the screen from the presenter. It provides a complete package for engaging learning with many features, including two HDMI inputs, powered USB (Universal Serial Bus) port, powerful built-in speaker, enhanced lamp life, compact chassis & a handy mounting system for a fast & simple set-up.