Samsung 55" QMR-T Series Edge-Lit 4K UHD LED Interactive Touch Display (QM55R-T) - Panel Type: Edge LED BLU, Resolution: 3840 x 2160 (4K UHD), Brightness: 400 (with Touch glass), Contrast Ratio: 4,000:1 (without glass), Response Time: 8ms, Built in Speaker (10W + 10W), Connectivity: Input: 1 x DVI-D, Display Port 1.2, 2 x HDMI 2.0, 1 x HDCP2.2, Audio: Stereo mini Jack, DVI, HDMI, 2 x USB 2.0, Output: HDMI 2.0 (Loop-out), 1 x Stereo mini Jack, 2 x USB Type-B, External Control: RS232C(in/out) thru stereo jack, RJ45, VESA Mount (mm): 200 X 200