All of the devices we manufacture include a remote function that can deliver a signal from one controller to control other device(s) in multiple locations. With the capability of playing live and pre-recorded messages on the Netbell-NTG industrial PA system, you can use it with the Koda 100 Ethernet I/O controllers to build a network emergency notification system. The feature is useful for schools or factories that have a need for audible signals in separate areas or multiple buildings where running additional wiring is too expensive or not practical. Contact us now for more information.