The UltraSharp UP3017Q has a 30-inch OLED panel with a 3840 x 2160 pixels resolution. It offers a 60Hz refresh rate, 0.1ms black-to-white response time, 300 nits brightness, 1000000:1 contrast ratio, 178-degrees horizontal/vertical viewing angles, 147ppi pixel density and 1.07 billion color support. Display inputs include one DisplayPort 1.2 and one HDMI 2.0 port, as well as a USB Type-C port.
While OLED screens deliver impressive color reproduction, deep blacks and a high contrast ratio, there are also some drawbacks like AnandTech describes over here:
While OLED technology can deliver deep blacks, high contrast ratio and exceptional colors, it is not free of drawbacks. Colors can shift over time, and the organic layer may degrade over prolonged amount of time. To keep the lifespan of the OLED panel maximized inside the UltraSharp UP3017Q, Dell originally advertised a special integrated presence detector into the front panel of the display, which switches the monitor off when nobody uses it, though it is not clear if this is still present. Another disadvantage of OLEDs is a possibility of static image burn-in. The UP3017Q has a special pixel-shifting technology to try and inhibit this.