Screen Size: 28 inch (70.8 cm) Ultra HD (3840 x 2160) TN panel,Connectivity Port: 1 Display Port, 2 HDMI Ports, 1 Headphone Port,Aspect Ratio: 16:9, Brightness (Typical): 370 cd/m2,Refresh Rate: 60 Hz, Response Time: 1 ms,Viewing Angle: 170 degree horizontal and 160 degree vertical,Flicker Free Technology: Yes,Country of Origin: China