VKSM-S1091, 4K HDMI Switch, is a 9 (8+1) Ports 4K HDMI Switch with IR remote and serial control, and allows users to switch between 9 HDMI sources and then delivers the selected video stream to one HDMI output device (Monitor/ Projector). Dedicated HDMI cascade port enables HDMI switches cascading for video source expanding that means to turn the unit into a 16/24/32 ports HDMI Switch via Daisy-Chain feature. You can select the desired input source (up to 32 Max.) via the IR remote control or push buttons located on the switch.