ATEN True 4K HDMI Matrix Switch VM0404HB up to 4096 x 2160 @ 60Hz (4:4:4) (Connects any of 4 HDMI sources to any of 4 HDMI displays) : Amazon.co.uk: Electronics & Photo
ATEN VM0404HB Professional Audio/Video Video Matrix Switches Standard VM0404HBSearch Product or keyword 4 x 4 True 4K HDMI - iPOPULAR.CZ