As easy-to-use as it is to look at, the 3M Overhead Projector Model 1740 is designed with the savvy presenter in mind. The 3M Model 1740 features an open singlet projection head for easy cleaning, 2,500 lumens of brightness for visuals you can see even with the room lights on, and a sleek, contemporary cabinet to compliment your meeting room. A convenient lamp changer feature ensures you and your message are never left in the dark.