Acer B287K bmiipprzx 28" 4K UHD IPS Monitor - 3840x2160 - 4ms GTG - 300 cd/m2 - 1000:1 Contrast Ratio - Built-in 2W Stereo Speakers - AMD Adaptive-Sync - DisplayPort - Mini-DisplayPort - Headphone Jack - 4x USB 3.0 Downstream (UM.PB7AA.001)