Change image background only for mobile device

Hi, How can I change the picture header only for mobile devices?
I want to put another image. I can?
Thank you

Quark restaurant...

You could try by placing two images, adding them different classes and using media queries (in override.css) to show/hide one of them depending on screen size.

Thank you, I understand the concept. Technically how? What is the class picture? can you help me? Thank you

Could you please post an url to your site?

We basically do not do such changes for our users except those with vip accounts. You can use no-mobile and only-mobile module suffixes to force them on specific device.

thanks

Marco

If you have any additional questions regarding this topic, please let me know.