Automatic AV control system; Automatic priority switching (Works with HDMI and VGA. Latest signal connected to QueBec is active); 1 Uni-directional RS-232 or 1 IR port; Used for sending commands to projectors or other AV devices using serial or infrared communication; 3 General Purpose I/O ports; Fast installation (With Euroblock connectors installation is fast and efficient); Dimensions: 70 x 125 x 25 mm;