The GefenTV 4x1 Switcher for HDMI with RS232 switches between any of four Hi-Def sources to one HDTV display. Resolutions up to 1080p Full HD with multichannel digital audio are supported. The front panel LEDs show the currently selected source. This 4x1 Switcher has an auto-switching feature: If a new source is connected or turned on, the Switcher will automatically switch to that input. The 4x1 Switcher will revert to the previous input once the current device is turned off or disconnected. Any of the four Hi-Def sources can be selected by the push-button, IR remote control, or using the RS-232 control.