Manufacturer: 3M/COMMERCIAL TAPE DIV.

"2500 lumens of light can enhance your visuals even with the room lights on for note-taking. Lamp changer feature for instant bulb replacement at the flip of a switch. Open singlet projection head provides easy cleaning. In-circuit resistor extends lamp life. Durable stage glass ensures less maintenance, interruptions, and repair expenses. 10 x 10" staging area gives you the room you need to maximize your message. Lamp Interrupt Switch shuts off power to lamp when changing to prevent premature failure. Thermal protection circuit cuts power to the lamp if the projector exceeds safe operating temperature."