Screen Size 55” Panel Technology ADS Back Light Type Direct Aspect Ratio 16:9 Native Resolution 3,840 x 2,160 (4K UHD) Refresh Rate 60Hz Brightness (Typ.) 400 nit Contrast Ratio 1,200:1 Dynamic CR 1,000,000 : 1 Color gamut DCI 80 % Viewing Angle (H x V) 178 × 178 Color Depth 1.07G (8bits + FRC) Response Time 8ms (G to G) Surface Treatment 1% Lifetime 30,000Hrs (Min) Operation Hours (Hours / Days) 16 / 7 Portrait / Landscape Yes / Yes