Model 55UM5N-H | 55" | Panel IPS | Resolution 3840x2160 | Refresh rate 60Hz | Brightness 500 | Dynamic contrast (DCR) 1000000:1 | Response time 8 ms | Horizontal 178 degrees | Vertical 178 degrees | 4xHDMI | 1xDisplayPort | 1xAudio-Out | 2xRS232 | 1xUSB 2.0 | 1xRJ45 | PSU Inbuilt | 300 mm x 300 mm | Operation time hours/day 24/7 | Colour Black