LG 55UM5N-E 4K UHD Signage - 55" LCD - In-plane Switching (IPS) Technology - 24 Hours/7 Days Operation - 3840 x 2160 - 16:9 - 4K UHD - 8 ms - Direct LED - 500 Nit - 2160p - Yes - Yes - Serial - Yes - Ethernet - webOS 6.0: