does this do extended display?

The 4K 120Hz HDMI 4 in 2 out Matrix supports HDMI True Matrix mode, allowing you to select any of the connected 4 video sources for the output A and output B.

Questions & Answers: 8K @60Hz HDR UHD HDMI 2.1 Matrix, HDR 4K 120Hz HDMI True Matrix 4x2 48Gbps ARC 8K 60Hz Splitter Switcher Switch 4 in 2 out HDMI2.1 Audio extractor

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8K @60Hz HDR UHD HDMI 2.1 Matrix, HDR 4K 120Hz HDMI True Matrix 4x2 48Gbps ARC 8K 60Hz Splitter Switcher Switch 4 in 2 out HDMI2.1 Audio extractor

8K HDR HDMI True Matrix switcher switching any one of the four HDMI inputs to either one of the two outputs easily by remote control or buttons on the product panel
Supports HDMI 2.1 version, resolution up to 4k 120HZ and supports Dolby vision & HDR. Compatible with lower HDMI version also
With audio extractor. Extract audio from HDMI outputs and output to optical audio and L/R audio
Supports ARC. Return TVs audio to optical audio port where the TVs HDMI ports is ARC enabled
Use premium 8K HDMI cables only, and if you do not get the perfect quality, please use shorter cables
Supports audio independent EDID: choices for 5.1ch, 2.1ch and pass

$199^.99 –