Conference System, Conference Microphone, Matrix Switcher manufacturer / supplier in China, offering Vissonic Wireless Conferencce System Digital Conference System Controller, Vissonic Conference System Flushmount Microphone Cat5 Digital Conference Microphone Gooseneck Microphone, Mixed Matrix Videowall Controller Support Multipl Type DVI, VGA, HDMI, Hdbaset, SDI, AV (CVBS) and so on.