Plug & play USB connector: connect to a PC to operate the video conferencing software and play audio sources. Digital coding: you can randomly set or change the ID of each microphone unit, which avoid the difficulties of traditional encoding method. Intuitive Web UI: via TCP/IP internet control, you can manage a meeting via web browsers. Multi-point control: support multiple persons logging in and setting simultaneously. 4 sets of RJ45 ports: for 5 chairman units and 35 delegate units. Password protection: prevent the unauthorized persons from logging in and operating the system. Circuit protection: each port is equipped with circuit protection mechanism, making the entire system safer and more stable.