Dell C5519Q 55-inch 4K VA LED Conference Room Monitor (210-ARCT) - Aspect Ratio: 16:9, Resolution: 3840 x 2160, Response Time: 8 ms, Contrast Ratio: 4000:1, Brightness: 350 cd/m, Refresh Rate: Connectivity: 1 x VGA, 1 x DisplayPort 1.2, 2 x HDMI 2.0, 1 x USB Dedicated charging port, 2 x USB 3.0 Downstream, 1 x USB 3.0 Upstream, 1 x RS232, 1 x RJ-45, 1 x Audio Line Out, 1 x Audio Line In, Wall Mountable: VESA (400 x 400mm)