Samsung UD55E-B — UD-E-B Series 55 Direct-Lit LED Video Wall Display - LH55UDEBLBB/GO Contrast Ratio (Typical): 4000:1 Viewing Angle: 178°(H) / 178°(V) Pixel Pitch: 0.63mm(H) x 0.63mm(V) VESA Compatible: 600 x 400mm HDMI Port: 2 DVI Port: 1 USB Port: Yes Other Ports: Analog D-SUB, Display Port 1.2 Stereo mini Jack DP1.2(Loop-out)