3.5 "Zoll-Farb-Video-Türsprech

video door phone;video door station;color video door phone coloror B/W video door phone; intercom with outdoor station and administration center, ccd or cmosmonitor; remote unlock Features: 1, One door station can support up 999 indoor phones. 2, Color or B/W video communication is optional. 3,Intercom between door station ,indoor phone and guard unit is available. 4,90 seconds intercom and 20 surveillance is available. 5, With card reader function,you can unlock the door with IC card. 6,Switch against uninstall is provided. 7,Panel:Aluminium alloy 8,Size:140mm*425mm