Grandstream Multicast Paging Speaker GS-GSC3506 v230W high fidelity speaker with HD acoustic chamber Supports SIP paging, multicast paging, call waiting with priority override, and more Supports full band and wide band audio codecs, including Opus and G. 722 1x 3 pin differential line out port Ports include 1x 2 pin switch in input, 1x alarm in input, 1x DC24V, 1x network, and 1x USB port; Keys include volume up down, and reset One 10 100Mbps network port with PoE PoE+ PoE++ GSC3506 v2 Multicast