The Atlona AT-HD4-V41 is a 4×1 HDMI switcher with a S/PDIF digital audio output, auto-switching and a high speed digital performance connection between four sources and a display or other device with an HDMI input.  With integrated HDMI Ethernet Channel (HEC) and Audio Return Channel (ARC) over a single HDMI cable, it simplifies system design when connected to displays that utilize those functions. Auto-switch simplifies control so that the last connected source is always displayed.