Default [Q] Acer Iconia A1 810

I am baffled why, I've just got the A1 810 it's OS is 4.2, there's no wireless display setting, so no chance of mira-casting. I thought 4.2 upwards had wireless display as a standard. Has Acer disabled this? if so how do I enable it?, your help would be very appreciated. I cannot find anything on the web, or Acer's site.