Built-in 4X1 video switch matrix; Panel with key of controlling camera, it is able to connect and control 4 high-speed cameras; The conference main unit with English liquid crystal display, and it can lead to set conference mode, microphone ID address, preinstall seat quickly, also display the current state, including whether lock the camera or not; The innovative intellectual telecontrol in the field could all- directionally control the 4 high speed cameras in work. It could replace completely the cloud terrance unit, especially applied in quick setting the microphone ID address. Adjust and preserve microphone-camera linkage quickly to reset the position, and adjust the distance when the preinstall position is far away from the speaker. It provides the user unpredicted convenience in operating and short cutters;