The dish you have will affect how many channels you can record at once on your 4K TV Box." Presently, Freesat boasts a roster of over 100 channels, some not available via Freeview, like ITV2 HD ...

Even if it’s a Sky satellite dish or an older model, all you need to do is plug the satellite cables into the back of your Freesat 4K TV Box [or some smart TVs] and you’re good to go.