HP ELiteDisplay E231i F9Z10A8#ABA 23-Inch Screen LED-Lit Monitor 23-inch IPS Display (1920x1080) 60Hz DisplayPort + DVI-D + VGA, 3X USB 2.0 Ports 250 cd/m Brightness, 178/178 Viewing Angles 8 ms Response Time, 16.7 Million Colors