AOPEN's 31.5 inch ultra-thin IPS monitor with 4K UHD resolution delivers the incredible. Crisp, true-to-life colors come alive with the amazing 3840 x 2160 resolution, allowing you to enjoy High-Definition entertainment in the comfort of your home. Enjoy smooth video playback with a rapid 4ms response time. Through AMD FreeSync technology, the game's frame rate is determined by your graphics card, not the fixed refresh rate of the monitor, giving you a serious competitive edge. Smooth, tear-free gameplay!! And a whole lot more. Your eyes will stay strain-free thanks to AOPEN VisionCare's array of eyeprotecting technologies. (UM.JS2AA.003)