Cyberdata 011186 V3 Voip Outdoor Intercom Cpnt - -Faster V2 processor- Increased IP rating to IP64- Now supports SRST (Survivable Remote Site Telephony)- New streamlined case design - Optional weather shroud (not included) for even greater weather protection- PoE 802.3af enabled (Power-over-Ethernet)- SIP compliant- Adaptive full-duplex voice operation - Network adjustable speaker volume and microphone sensitivity- Network downloadable firmware- Doubles as a paging speaker- Dry relay contact for auxiliary control- Peer-to-peer capable - Door closure and tamper alert signal- Optional security torx screws with driver kit- Dimension : 5"x5"x2.5" (H x W x D)