I need to change this background image

delinea

I need to change this background image of this module.

saguaros

It's background set by this css rule:

#t4-section-2 .bg-overlay-image {
    background-image: url(/images/joomlart/others/item-4.png);
    background-repeat: no-repeat;
    background-size: contain;
    background-position: 0 0;
}

You can change the background image in above path: /images/joomlart/others/item-4.png