KDL 7? Video Doorbell Door Phone Intercom System RFID Access Control with Two-Way Audio/IR Night Vision/Multi Ring/Color HD Camera Monitor for Home Security (2 Monitors)

Features: 1, The outdoor unit support to open door with RFID cards. The working proximity frequency is 125KHz. 2, The distance between the outdoor unit to indoor unit is max 100m in theoretical. 3, This wired video intercom system support to connect max 2 outdoor cameras and max 6 indoor monitors. All of the monitors which connected in a same system should be 4-core or 5 core wires type, while ...