Samsung 75" QB75R Enhanced communication in a compact Professional Display (SAMSUNG QB75R) - Panel Type: Edge LED BLU, Resolution: 3840 x 2160 (4K UHD), Brightness: 350 nit, Contrast Ratio: 4000:1, Response Time: 8ms, Built in Speaker(10W + 10W), Connectivity: Input: 1 x DVI-D, 2 x HDMI 2.0, 1 x HDCP 2.2, Stereo Mini Jack, DVI/HDMI/Audio(Common), 2 x USB 2.0, Output: 1 x Stereo Mini Jack, External Control: RS232C(in/out) thru stereo jack, RJ45, VESA Mount (mm): 400 X 400