Question about Delock 4K UHD HDMI Switch

The manufacturer's specs are not much more explicit: https://www.delock.com/produkte...
and I only use it for a Nintendo NES and other retro games that don't need frequency or definition

According to the description in the article on the Digitec website, the frame rate is specified at 60Hz:
Delock 4K UHD HDMI Switch