... call for help video intercom desk-top ip intercom microphone for toll station Enabled by TCP/IP technology, Huanyutong ... realize full-duplex intercom.• Built-in Speaker, built-in microphone and camera• Digital audio and video recording, can save ... 100MbpsAudio Sampling22.05kHz~44.1kHz, 16bitTransmit Rate16kbps-192kbpsCameranoInterfaceAudio output, 4 short-circuit input, 2 short-circuit output, SD card ...