Amazon.com: OREI 6X4 4K HDMI Matrix Switcher Extender - HDBaseT UltraHD 4K @ 60Hz 4:4:4 Over Single CAT5e/6/7 Cable with HDR, CEC & IR Control, RS-232 - Up to 132 Ft 2
Kramer VS-66H2 - 6x6 4K HDMI Matrix Switcher with Digital Audio Routin - Truth Seeker Productions/GearTechs.com
Wyrestorm MX-0606-PP-POH 6x6 HDBaseT Matrix Switcher with HDMI Mirror Outputs, Bidirectional IR, Routed RS-232 and PoH (1080p: 70m/230ft) - AV Ace
Brightlink New 4x4 HDMI Matrix - Support 4K@60HZ 4:4:4, Downscaler