4x1 HDMI 1.3 Switcher.. New model includes RS232 input. Gefen's 4x1 HDMI Switcher routes high definition video in multiple resolutions up to 1080p plus multichannel digital audio from any of four sources. four inputs accommodate the simultaneous connection of up to four high definition video sources, such as satellite systems and HD DVD players. The output sends the high definition audio/video signals to a high definition display. Switching is done via the IR remote that is provided with the unit.