The Model RSM-1 Remote Speaker/Microphone a remote speaker-microphone designed for use with Linear's PERS consoles. The attractive plastic case houses an 8-ohm speaker and high-sensitivity microphone. The unit is used for 1-way and 2-way voice communications, remotely from the Console. A four-position terminal block is provided for connection to the Console. The RSM-1 can be tabletop or wall mounted. A wall mounting template is provided on the rear cover of the instruction manual.