Led monitor series dell professional screen size 238 inches max resolution 2 560 x 1 440 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 0 205 mm viewing angle 178178 hdcp enabled number of hdmi inputs 1 number of displayport inputs 1 number of vga inputs 1 usb 20 ports 4 integrated feature usb