System function traits: Built-in software, the system does not need computer when debugging, operating and readjusting With built-in 4 x 1 video matrix switcher, panel with key of controlling camera, able to connect and control four high-speed cameras English LCD display, set conference mode, microphone ID address and preset seat quickly, and also able to display current state Innovative remote controller can set microphone's ID (increase/decrease microphone freely), adjust and save preset seat of microphone, control microphone quickly, it make operation and expansion conveniently Video intelligent-track: The camera always track the last speaker when turning on the microphone, when turning off the microphone, it can track the previous speaker, when turning all the microphones, it can track the conference scene When the preset seats deviate from speaker, it is able to adjust by the remote controller Able to lock/unlock the camera by one key Multi-main meeting modes are optional (free mode, FIFO mode, limit mode and non-major meeting mode), chairman use only, chairman clue voice, turn off automatically Press the preferential key of chairman unit to cutoff all the delegate units which need to re-press to speak Use the imported Panasonic microphone cartridge the distance from microphone of 450 to 500mm, without whistle (matched with same brand equalizer controller)