4k monitor gaming monitor screen size 28 inches max resolution 3 840 x 2 160 pixel lcd technology tn response time 1 ms aspect ratio 169 contrast ratio typical 1 0001 brightness 370 cdm refresh rate 60 hz widescreen dot pitch 0 16 mm viewing angle 170160 hdcp enabled display settings format adjustment number of hdmi inputs 2 number of displayport inputs 1 usb 20 ports 4 outputs headphone jack synchronisation digital integrated feat