The GefenTV 4×1 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 4×1 Switcher has an auto-switching feature: If a new source is connected or turned on, the Switcher will automatically switch to that input. The 4×1 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.