The Dell SE2419HR/SE2719HR flat-panel display is an active matrix, thin-film transistor (TFT) liquid crystal display (LCD) that uses LED backlights. The monitor features include: 604.7 mm (23.8 in.) diagonal viewable area display (measured diagonally) 1920 x 1080 resolution, supporting lower resolutions full screen; 686.0 mm (27 in.) diagonal viewable area display (measured diagonally) 1920 x 1080 resolution, supporting lower resolutions full screen; Up to 178° viewing angle, vertically and horizontally; High Dynamic Contrast Ratio (8,000,000:1); AMD Radeon FreeSync™ technology support; Up to 75 Hz refresh rate; Preset gaming modes include FPS (First Person Shooter), RTS (Real Time Strategy), and RPG (Role Playing Game); HDMI connectivity makes it easy to connect to both legacy and new systems; Plug and play (if supported by your computer); On-Screen Display (OSD) adjustments for ease of setup and screen optimization; 0.5 W sleep mode power consumption; TUV Certified Flicker-Free screen optimizes eye comfort; Over time, the blue light emitted from the display may cause eye damage, including eye fatigue or digital eye strain. The TUV-certified ComfortView feature is designed to reduce the blue light radiation from the display to optimize eye comfort