The 4 channel HDMI/RS232 input card, UHD-4K supports four (4) HDMI input ports up to 4K (3840 x 2160) @ 30fps (4:4:4), four (4) RS232 ports and four (4) IR ports. Any of the four (4) HDMI input ports may be switched, via the 500480 4K60 Multimedia 16?16 Matrix Switch, to any of the mounted output ports (up to 16 modular output ports may be mounted - 4 modular cards of 4 ports each). HDMI input ports may be switched to HDMI or HDBT output ports. RS232 and IR commands may be send to the 500480 4K60 Multimedia 16?16 Matrix Switch and transmitted through any of the respective four (4) RS232 and IR ports on the card to control end devices.</p>