KVM-Extender with 60 Hz at 4K resolution

What is the advantage of a 4K KVM Extender with 60 Hz support?

It's obvious. Try setting your PC to 30 Hz via its graphics card software, as is only possible with many KVM extenders at 4K. You will notice that you can hardly hit anything exactly with the mouse, because the mouse movement feels strange due to the delay (Delay). Only with a refresh rate of 60 Hz the mouse runs real.
4K 60 Hz DisplayPort 1.2 and USB 2.0 KVM-Extender-Set 4K 3840x2160, max 100 m, UNICLASS PK-110
yes 4K 3840x2160 60 Hz 4:4:4 up to 100 m
yes plus 4x USB 2.0
yes Local Loop of the DP
enlightenedNeeds 2 Patch Cables for connection ( 1 for Video, 1 for USB)
529,55 EUR
incl. 19% tax excl. Shipping costs
1 to 6 (from a total of 6)