LG Electronics 29UB67-B 29 inch Ultra Widescreen 5,000,000:1 5ms DVI/HDMI/DisplayPort/USB LED LCD Monitor, w/ Speakers (Black) 4-SCREEN SPLIT FEATURE- Efficiently run several programs and have multiple active windows on the screen at the same time. FLICKER-SAFE- Eye fatigue is a major concern when working overtime on the computer. LGs Almost-Zero Flicker Free technology, allows the ability to work longer and more comfortably without straining the eyes. READER MODE- With a touch of a button, Reader Mode allows the reduction of blue light emissions that can be harmful to the eyes. 21:9 Ultra Wide Multi-Tasking Monitor. H-Frequence: 30~90kHz; V-Frequence: 56~75Hz Mounting type: VESA COMPATIBLE