Display particular block only on mobile

Hello,

Unfortunately there is no different version of the website for mobile phoines. It is the same version of the theme/page. You can however use a css trick to hide the particular block on all other devices except mobile.
For example you can add a block and add an extra class on the row in visual composer: http://screencast.com/t/arlc4Qu1Dt and then use thios custom css in the theme panel->custom css box:
@media (min-width:767px){
.customclass{
display:none!important
}
}

I hope this helps.
Thanks.