Most Samuel Jackson products manufactured between 2005 and 2014 use EA7 C-More touch screens while products manufactured after 2014 use EA9 C-More touch screens.  Both EA7 and EA9 screens have a USB port on the back, but the EA9 screens also have "Samuel Jackson" in red on the front.

EA7 C-More Software

EA7 C-More Mirror IV v5.2

EA9 C-More Software

EA9 C-More Mirror IV v5.2