Make the most of any meeting. The 3M Performance Overhead Projector Model 1825 offers the utmost in brightness-from a minimum light output of 3400 lumens to a maximum of 4000. A wide-angle articulating closed singlet lens produces crisp, detailed images kept focused by a rack-and-pinion mechanism. The 3M 1825 also boasts a brand new look of tough sophistication that fits any meeting room or classroom environment. Features include thermostat that prevents the unit from overheating; lamp ejector that makes the task of changing lamps easy; high-to-low dimmer switch that conserves lamp life; fold down post that makes moving and storing simple and a strong power cord wrap. Utmost in brightness-minimum output of 3400 lumens to a msx of 4000 Super color images and crisp black and white text Wide-angle, articulating singlet lens produces detailed images kept focused by a rack-and-pinion mechanism. Brand new look of tough sophistication fits with any meeting-room or class room environment. Lamp ejector makes the task of replacing lamps easy High-to-low dimmer switch conserves lamp life Fold-down post makes moving and storing simple Closed head prevents damage to lens from dust, dirt and smudges Thermostat prevents unit from overheating Lamp ejector makes the task of replacing lamps easy