- Discreet compact design- Built-in microphone for silent monitoring- Automatic polling and programming software included- 2 Amp relay contacts for SL-2 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 <4 Watts)- Automatic Noise Canceling (ANC) feature for proper operation in noisy areas- VoIP eliminates the need for Push to Talk mode- Network downloadable fir