... screen 2.1080p video 3.lockable for safety 4.wifi/ 3G network 5.CE,UL,CCC,FCC listed ... years free service.♥Size: 7", 10", 15", 19", 22", 32", 42" and 55" LCD digital signage/advertising display/ ... instructions and more;♥Very easy to use, installation free, maintenance free are the core values of our product♥Considerate ... (or built-in memory) by simply inserting an USB flash drive, no need to take out of ...