The NM200 system is a full-function intercom and music distribution system designed for residential use. The system supports up to 15 remote stations and up to three door speakers. The built-in AM/FM radio tuner allows setting eight AM station presets and eight FM station presets. The backlit liquid crystal display shows the operation mode, audio source, radio frequency, volume setting, and time. With the optional NC300 6-disc CD changer installed, the display shows the disc number selected and the track number currently playing. The optional three-note Model NA3003C or eight-note Model NA3008C chime modules provide a selection of door chime sounds. For master unit rough-in and installation components, order the Model NWH300 Rough-in kit to mount the NM200 "Master." If the optional NC300 CD Changer is used, order the Model NF200C Combination Frame and the NWH300C CD Combination Rough-in Kit.