VK-PB-3-IP, VoIP Emergency Phone Panic Button w/User. Discreet compact design. Builtin microphone for silent monitoring. Automatic polling and programming software included. 2 Amp relay contacts for SL2 strobe light control, etc. SIP compliant (see DOD 944) for list of compatible phone systems and cloud providers. Outbound Proxy, Authentication ID, Peer to Peer, VLAN Tagging. PoE powered (class 1,