Image quality and features Resolution is the defining feature of Dell's S2721QS. 4K (3,840 x 2,160) on a 27-inch screen works out to 163 pixels per inch. That's double the pixel density of a 27 ...

The Dell S2721QS sets the standard for value among 27-inch monitors, delivering a beautiful, vibrant 4K screen at a modest price. Buy at Walmart.com Buy at Bestbuy.com Outstanding image quality ...