M&S SYSTEMS DMC3PACK 3-Wire Music/Communication Retrofit System Package

Designed as a retrofit for 3-wire intercom systems; Offers many of the basic components needed to assemble a 4-room, 1-patio & 1-entry door music/communication system;Kit includes: ; 1 DMC3-4 music/communication retrofit system master ; 4 DMC3RS room stations ; 1 DMC3RW patio station ; 1 DS3B door station with bell button ; 1 MC3 3-note chime module;