how to use diffrent Jumbotron Sectionbackground pictures for a mobile/desktop?

hi guys
please help me
with defining a proper setting for a mobile view (a picture), and another for a desktop view (b picture).

my current picture isn’t performing well on a mobile view, so id like to interchange apropriatly .

thank you!

excuse bad english

The page I need help with:

Hi there,

The theme does not have an option to do that on the jumbotron section.
The only workaround we can think of is maybe use some custom JS that changes the background image when the screen size changes but this is a bit complicated and not really within what we do as support.

There are persons where that specialize in such modifications -
Hope this clears things up.