Led monitor 4k monitor series dell professional screen size 238 inches max resolution 3 840 x 2 160 pixel lcd technology ips response time 8 ms aspect ratio 169 contrast ratio dynamic 2 000 0001 contrast ratio typical 1 0001 brightness 300 cdm refresh rate 60 hz widescreen dot pitch 0 138 mm viewing angle 178178 pixel density 18358 ppi hdcp enabled display settings srgb support number of hdmi inputs 1 number of displayport inputs