- Touch-free motion sensor with adjustable range from one to four inches - Motion sensors ring LED lights blue during idle, flashes green during dialing and lights steady green when call is answered - Automatic polling and programming software included - 2 Amp relay contacts for door/gate or SL-2 Strobe Light control - SIP compliant - Outbound Proxy, Authentication ID, Peer to Peer, VLAN Tagging - PoE powered (class 1, <4 Watts) - Automatic Noise Canceling (ANC) for proper operation in noisy environments - VoIP eliminates the need for "Push to Talk" mode - Network downloadable firmware - T-10 Torx security screws for added security - Can be used with optional RC-4A Secure Relay Controller - Marine grade 316 stainless steel prevents corrosion on stainless steel models - Laser etched graphics on stainless steel models - Programmable to dial up to 5 numbers on busy or ring no answer - Cycles through backup phone numbers on busy or no-answer - Hangs up on busy signal, time-out or touch tone command - Remotely programmable - Extended temperature range of -40?F to 140?F - Volume adjustments for microphone and speaker - Flush mounts in a standard double gang electrical ---------box (not included)---- - Diagnostics for testing microphone, speaker, and relay