Brighten up any room with the easy-to-use 3M Overhead Projector Model 1830. An articulating closed doublet lens creates uniform focus and sharpness, and the closed-head design protects the lens from dust and dirt. Built to deliver high-quality presentations, the 3M Overhead Projector Model 1830 uses 2,700 lumens for vivid, high-resolution images in the brightest rooms. Features include lamp ejector that makes replacing lamps simple, fold-down post that makes storing and moving simple, thermostat that prevents overheating, and power-cord wrap. The 3M Overhead Projector Model 1830 is backed by a five-year warranty on all parts and labor.