Control system unit with 8 digital I/O control ports and 8 low relay control ports for controlling currently connected devices such as projector lift (up/down), curtains (open/close), projector (pitching), lightings (on/off), and so on. Built-in digital conference control protocol, to implement microphone control, voting control and voting results display easily. It is specially designed for modern meeting halls and can be connected perfectly with conference system to provide a perfect solution.