Mobile to HDMI adapter

I did not know these things existed until googling why the cromecast would not work.

This it from our van thread but I thought it may be of information to others out there.  

Watching phone on avtex tv seemed like a good idea , I tried a cromecast but it needs a internet connection . 
Found one of these 
https://www.amazon.co.uk/gp/product/B01G3M8UIW/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

£13.99 on amazon other phones or laptops need a different one . converts to hdmi  once you install something like this 

 https://play.google.com/store/apps/details?id=com.displaylink.presenter&hl=en_GB 

Displays anything on your phone screen , here is my camera on screen while taking the picture.

Sat in the van and watched the rugby via BT sport yesterday great HD picture on the avtex.