Provides control of who comes into building along with the ability to verbally and visually confirm their identity.

Features

• Body material: Aluminum alloy
• Camera: 3M pixels, automatic lighting
• Button: 1 call button
• G-sensor: Support
• Infrared Sensor: Support
• RF Card Reader: 13.56MHz & 125kHz
• Output Relay: 2 output relays for door opener
• IEEE 802.3af Power-over-Ethernet
• 12V DC connector (if not using PoE)
• Water-proof & Dust-proof: IP65
• Installation: Wall-mounted
• Dimension: 85x145x27.5mm
• http://www.akuvox.com/pro1/R20A-low-cost-SIP-Doorphone.shtml