Dell 24 Monitor - S2421H Full HD (1920 x 1080) at 75Hz, In-Plane Switching (IPS); Anti-glare with 3H hardness, Aspect ratio:16:9, Pixel pitch: 0.2745 mm x 0.2745 mm, Brightness (typical): 250 cd/m2, Color gamut (typical): 72% NTSC (CIE 1931), Color depth:16.7 million colors, Contrast ratio (typical):1,000 : 1, Typical viewing angles (vertical / horizontal):178o / 178o, Response time (typical):4ms gray to gray in extreme mode, Backlight: LED edgelight system, Audio Output: 2x3W, AMD FreeSync: Yes, supports AMD FreeSync technology with refresh rate of 75Hz, TUV-certified: Yes, ComfortView with Flicker-free screen, Dell Display Manager compatibility: Yes, with Dell EasyArrange, Connectivity: 2 x HDMI 1.4 ports, 1 x Audio line-out port, Stand adjustability: Built-in cable management slot, VESA mount compatible: Yes, 100 mm x 100 mm, Security lock slot: Yes (cable lock sold separately), AC input voltage/frequency/current: 100 VAC to 240 VAC / 50 Hz or 60 Hz 3 Hz / 1.5 A (typical), Power consumption (Operational): 0.2 W (Off Mode) 0.2 W (Off Mode) 0.2 W (Standby Mode) 0.2 W (Standby Mode) 13.1 W (On Mode) 16.8 W (On Mode) 30.0 W (Max) 41.0 W (Max), Border Width (Edge of Monitor to active area): 5.4 mm (Top/Left/Right) 6.0 mm (Top/Left/Right) 20.7 mm (Bottom) 21.3 mm (Bottom)