... microphone voip, hands-free converstation video intercom, broadcasting, monitoring, remote control IP video intercom paging microphone Enabled by TCP/IP technology, Huanyutong IP Network ... 16kbps-192kbpsDisplay Screen7 inch LCD color touch screenInterfaceAudio input/output, 2 short-circuit, SD card holder, RJ45, USBDimensions270x165x52mm IP video intercom paging microphone