This projector offers superb interactivity thanks to its dual pen capability with a brightness of 3 500 lumens and hd ready wxga resolution the eb 685wis ultra short throw design allows you to present large images from a very short distance with minimised shadows and glare a 14 0001 contrast ratio and hdmi input mean that students benefit from sharp clear images high brightness and image quality epsons 3lcd technology ensures high quality images with equally high white and co