Make great professional business and educational presentations with the 3M 1830 Plus Overhead Projector. The 1830 Plus features chemically-hardened stage glass that is break resistant and easy to replace. 2700 ANSI lumens provide bright, vivid images, even in lighted rooms. An open singlet wide angle projection lens is easy to clean and maintain while the dual element fresnel lens provides sharp, crisp screen images. The 1830 Plus comes with other great features, like a built-in resistor to extend lamp life and a built-in pen tray for convenient storage. The projector is easy to setup and take down, so you can get work on your presentation, then get out the door. A fold-down post makes it easy to store when not in use or in transit.