How can I change default products in a row for mobile?

[louisellul]

Hi all. I am relatively new to Virtuemart 2.0 and am currently using it as a catalogue only. However, I have built a mobile version of the site using JTouch Mobile and when the virtuemart products show, they have the same parameters as the desktop site, e.g. 4 products per row. Naturally, this looks like crap on a small screen and the products overlap. Is there a way to change it to 2 products per row whilst leaving the desktop site alone?

Hope that makes sense and thanks in advance!