... , tamper proof hands-free converstation prison ip network intercom system Enabled by TCP/IP technology, Huanyutong IP ... Works everywhere as long as Ethernet available, can cross network segment and routing.Installation in the control center, use ... color touch screenInterfaceAudio input/output, 2 short-circuit, SD card holder, RJ45, USBDimensions270x165x52mm Combination:Sub-stations TBV-6201ASub-stations ...