The CB-22/CB-22P Classroom Ceiling Enclosure is designed for classrooms, conference and meeting rooms with a projector and control equipment. This 2?x2? enclosure has ample room for two full rack pieces of equipment or four half-rack pieces on the built-in shelves. The unit includes an external AC receptacle and a switch/circuit breaker the on the ceiling surface, and five AC outlets ergonomically spaced to allow room for wall warts inside the enclosure. A white rim door that you insert a ceiling tile into for a matching look is included. An optional fan kit and a variety of mounting kits are available.