Acer K222HQL Monitor Display diagonal: 54.7 cm / 21.5 inch Display type: Twisted Nematic Film with LED backlight, matte Display size: 477 x 268 mm Resolution: 1920 x 1080 (16:9) Response time: 5 ms Refresh rate: 60 Hz Colours: 16.7 millions, 72% NTSC colour range Ergonomics: -5°~25° tilt angle Connectivity: DVI, HDMI 1.4, VGA