HDMI is the most common audio/video connection in use.TESmart HDMI switcher allows up to multiple Ultra HD sources( Blu-ray players, DVRs, Streaming boxes, etc.)to be routed to 1 Ultra HD display. Support resolutions up to 4K@60Hz. Deep Color, 3DTV pass-through. Support S/PDIF and L/R audio out. And support lossless audio formats such as LPCM 7.1, Dolby TrueHD, and DTS-HD Master Audio are also supported. With EDID emulators in each input port, keep PCs always having correct display information, prevent display settings from changing while switching input ports.