DELL P5525QC Digital Signage Flat Panel 138.8 Cm 54.6 LCD 400 Cd/m? 4K Ultra HD\n\nMade for team collaboration, this monitor provides up to 90W power delivery via USB-C and flexibility to include an OptiPlex Micro based on your needs.\n\n Specs\n\nDisplay\n\nPanel type\n\nIPS\n\nLED backlight\n\nA backlight is a form of illumination used in liquid crystal displays (LCDs). One type of backlight is made by LEDs, which can be either white or RGB (red green blue). White LEDs are used most often in notebooks and desktop screens, and in virtually all mobile LCD screens. RGB LEDs for backlighting are found in high-end color proofing displays such as HP DreamColor LP2480zx monitor or selected HP EliteBook notebooks, as well as newer consumer grade displays such as Dell's Studio series laptops which have an optional RGB LED display.\n\nLED backlighting type\n\nBacklighting is the illumination of a screen e.g. LCD (liquid crystal display). There are several types of backlighting with LEDs, e.g;