Featured-image and the responsive theme

I installed a responsive theme from
http://ww.wp.xz.cn/themes/responsive

The installed theme and the wordpress site can be found on the following url

http://69.195.124.156/~dispate4/site3

On the home page, there is this featured-image showing a monitor, smartphone and a tablet. I need to know from where this image is getting pulled. I looked in the backend admin for any place where I can find the image but could not get to it.

Thanks in advance