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" Color Video Door Phone Connected by Cat-5 Cable, Video Intercom, Video Interphone, Video Door Phone Monitor, Video Door Bell Function: Monitoring, audio conversation, electronic door lock, intercom between monitors. Indoor Monitor, * Display: Digital 7" TFT-LCD(16: 9 diagonal) * Connection: 2 VDP cameras, 4 indoor monitors * Wiring: CAT-5(indoor monitor to door station, monitor to monitor) * Power Supply: DC 13.5V * Power Consumption: Standy-by 0.5W / Operating 10W * Installation: