◆     system supports 50 microphones at most

◆     Open mode: To select the maximum number of delegate microphones to be activated simultaneously(1,2,3or4). The microphone must be switched on or off manually by pushing the button on the delegate unit.

◆     Override mode: Only one delegate microphone can be activated. If a new delegate presses his microphone button, the microphone unit of the current speaker will be switch off

◆     Chairman only mode: Only the chairman units can be activated

◆     Test mode: when the central controller unit works, the ring lights on the head of the chairman/delegate microphones are on, in order to check whether the signal is correct.

◆     Microphone-off mode: turn off all the microphones simultaneously

◆     serial ports for using PC and visions control