Can you display different ads depending on the users device?

Hello,

I’m using the latest wordpress version with the latest twenty twelve theme. My website is http://www.cryptorushnews.com and I have a child theme set up. I have a banner in my header to the right of my logo and it displays the way I want it to on a desktop. When viewing my site from a smartphone or tablet, the header runs into the logo.

Is there a way to display the banner in a different size or maybe a completely different ad all together when the user is accessing the website from a mobile device?

Thanks in advance for any help.