The Atlona AT-UHD-H2H-88M is a HDMI to HDMI matrix switcher that allows users to connect up to eight HDMI sources and eight HDMI displays. It supports resolutions up to 4K/UHD @ 60 Hz with 4:2:0 chroma subsampling, as well as 1080p/60 with full 4:4:4 chroma subsampling. The product is manufactured by Atlona, a well-known brand in the audio/video industry. This particular unit is listed as used.