- SIP (RFC 3261) compatible- Night Ringer function- Plays audio from multicast- Web-based configuration- Paging prioritization and background music- Web-based firmware upgradeable- External volume control- Small footprint- High efficiency speaker driver- PoE 802.3af Enabled (Powered-over-Ethernet)- IGMP l SIP endpoint or multicast group member- Network-adjustable speaker volume- Peer-to-peer capable- Can drive one ext. analog speaker for more volume Color: Grey White