The CyberData Multicast Wall Mount Speaker is an economical Power-over-Ethernet (PoE 802.3af) and Voice-over-IP (VoIP) public address product. It easily connects to your PoE network with a single Ethernet cable connection. The speaker is capable of playing messages from any multicast source like the CyberData SIP Paging Server with Bell Scheduler (PN#011146). The device's streamlined case and included mounting hardware offers an easy installation in almost any environment.