The 3M Overhead Projector Model 1880 features a closed head which prevents tampering with the precision two-element lens. There's a color-tuning dial for edge-to-edge brightness, and high-to-low intensity switch that adjusts from 2,400 lumens to 2,800.
Store and move the projector easily using the carrying handle and fold-down post. Stay on course during meetings with the convenient digital clock. Check out the other features such as a lamp changer that makes changing lamps simple and a power-cord wrap.