Scheduler Message Module for sending up to 50 MP3 audio messages to PA system with time scheduling and control for 8 zones. Each message made with 1, 2 or 3 different audio files. Audio output with priority by relay and 8 open collector outputs for zone control. Time scheduling with start and end, time of launch, frequency, repetition, holidays... Contact inputs for remote activation of up to 8 priority messages. Programming from computer via Ethernet connection and integrated WebServer. Stand-alone operation without computer.