LG 55UH5N-E 55" 4K UHD Signage Display (55UH5N-E) - Resolution: 4K 3840 x 2160 IPS, Contrast Ratio: 1200:1, Response Time: 8ms, Brightness: 500nits, Operation Hours (Hours / Days): 24 / 7, 16GB Internal Memory, Built-in Wi-Fi, Built-in Speaker, Connectivity, USB 2.0 (Type A), 3 x HDMI In, 1 x HDMI Out, 1 x DisplayPort In, RS-232C In, RS-232C Out, RJ45 (LAN), IR In, Audio Out, Wall Mountable: VESA (300 x 300mm), LG webOS 6.0