2pin Wire Video Door Phone Visual Intercom Doorbell

2pin Wire Video Door Phone Visual Intercom Doorbell + 7in TFT LCD Screen Monitor + Electric NO Lock, IC Card / Password / remote control unlock intercom doorbell system, 1 Doorbell + 1 Monitor The 2-wire system required only two wires, power, audio, video and control signal all transmitted by a 2-wire cable, non polarity, central power supply. Use Plug-in connectors and DIP switchers for rapid installation.Integrated Multi functions with simple operation makes the system more attractive, Flexible cable connection to wire, support in-out, branching and mixed mode.Dual intercom communication between indoor units.Features:1.The 2-wire system required only two wires, power, audio, video and control signal all transmitted by a 2-wire cable.2.Using integrated power suppply,max support 2 outside unit and 6 indoor monitors3.Little rain and oxidation-proof for the durable aluminum alloy outdoor unit. with White Led Night Vision4.7" color TFT LCD without radiation, low power consumption and high