The cable that is USB to barrel 5v to 12v I had to buy from amazon to be used with the item in the picture below. Now there is a cord that came with the full kit as a part of the 8 inch screen, The 12.1 inch screen needs 12v so that is why I bought cord from amazon. I will try the cord that came with the 8 inch screen which is a USB to JST power cable.
USB to JST power cable
