This audio / video switch by Delock is a manually bidirectional switch for connecting different devices with RCA ports. This switch offers two different applications. You can connect up to four devices with RCA ports to one monitor, TV or beamer etc. with RCA input ports. By using the button you can select which device should display the analogue signal. You can connect one device with RCA ports to up to four displays and select the monitor which should display the analogue signal by using the button. (Simultaneous output to multiple screens is not possible)