The w319ust is perfect for businesses schools and colleges it is bright 3300 lm and a throw ratio of 0271 means that it can project a 100 image from less than 05 m away and 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 advanced features including two hdmi inputs powered usb port powerful 16 w built in speaker improved lamp life compact chassis