1.Bankintercom 2.A key calling 3.Humanized installation design 4.With a rain shade, IP54 5.National patent product Video Voice IP intercom System based on TCP/IP network communication and DVR platform two systems.It’s based on TCP/IP technology,with the functions of high integration density, high stability,privacy,high fidelity, dual-way intercom, easy installation, low cost of maintenance, used ...