The VS0401 is a 4-port video switcher that switches between four audio/video sources to output to one speaker/display. This product can control your system by executing serial commands via the RS-232 port of the body. Using advanced features such as port switching, automatic switching, front panel locking push button and power status detection, this device can be controlled from a secondary system. Ideal for conference rooms, media centers, classrooms, and anywhere you need to share a single display with multiple audio/video sources, in which you need to make announcements and presentations.