I bought this to switch my 49" ultra-wide monitor between my work laptop and my PC. The monitor has a resolution of 5120x1440, which is fewer pixels than 4K - so I was expecting this to work. However, even after spending another small fortune on good DisplayPort cables, all I get is either a flickering picture or just a black screen. The USB switching works fine - and after reading the manual I figured out that I could turn off the mouse emulation mode and plug in a USB hub with all sorts of devices.