Acer S1 -S271HL Dbid 27" Full HD (1920x1080) Monitor 60 Hz (Certified Refurbished) 27" Full HD 1920 x 1080 Resolution Display, HDMI, DVI-D, VGA Response Time: 6 ms, Aspect Ratio: 16:9, Refresh Rate: 60 Hz Horizontal Viewing Angle: 178, Vertical Viewing Angle: 178 Backlight Technology: LED, Adjustable display angle Ultra-Slim profile, VESA mount: 100mm x 100mm