ASUS ROG Swift OLED PG27UCDM 27" 4K QD-OLED Gaming Monitor, 3840×2160 UHD, 240 Hz Refresh Rate, 0.03 ms (GTG), 4th-Gen QD-OLED | QD - OLED Panel, Res: 3840 X 2160, 240Hz, 0.03ms GTG ) 4K. Key features: 26.5-inch 4K (3840 x 2160) QD-OLED gaming monitor; Latest 4th-gen QD-OLED technology delivers sharper imagery; OLED Anti-Flicker 2.0 technology; New ASUS OLED Care Pro functions with Neo Proximity Sensor.