Special Features:

End item : audio matrix intercom system. Item has control keys that have bright and dimmable 8 digit alpanumeric led displays, individual rotary encoder for listen level control and led level indication for each talk key.

Properties:

A panel, upon which are mounted such items as indicator lights, meters, relays, switches and the like, which is specifically designed for the purpose of controlling the operation of electrical and electronic equipment. See also panel, test, electrical.