ASUS ROG STRIX OLED XG27UQDMS Gaming Monitor, 27 Inch 4K 240Hz Tandem QD-OLED, 0.03ms GTG, G-SYNC Compatible, VESA DisplayHDR 400 True Black, 99% DCI-P3 | QD - OLED Panel, Res: 3840 X 2160, 240Hz, 0.03ms GTG ) 4K. Key features: 27 Inch 4K 3840x2160 Tandem QD-OLED, 240Hz; 0.03ms GTG Response Time, G-SYNC Compatible; VESA DisplayHDR 400 True Black, True 10-Bit Color; 99% DCI-P3, Delta E < 2, Uniform Brightness Option.