28" 4K/UHD (3840 x 2160) with 1ms response time and Adaptive Sync/AMD FreeSync for immersive, crisp visuals featuring DisplayPort and dual HDMI connectivity ASUS Eye Care technology lowers blue light and eliminates flickering to reduce eyestrain and ailments. Display colors is 1073.7 M 10 bit and maximum contrast ratio is 1000 : 1. It can allow a Adaptive-Sync/FreeSync supported graphics source to dynamically adjust display refresh rate based on typical content frame rates for power efficient, virtually stutter free and low-latency display update 5-Way OSD joystick delivers intuitive monitor controls so you can access features such as ASUS GamePlus on-the-fly. Digital signal frequency for displayport is 120 to 120 KHz horizontal, 40 to 60 Hz vertical. Hdmi signal frequency is 24 to 99 KHz horizontal, 40 to 60 Hz vertical Compliance and Standards- EAC logo, Energy Star, BSMI, CB, CCC, CE, CEL level 1, FCC, PSB, PSE, RoHS, TCO7.0, UL/cUL, VCCI, WEEE, WHQL (Windows 10, Windows 8, Windows 7), RCM, TUV Flicker-free , TUV Low Blue Light Exclusive GamePlus and GameVisual settings enhance color performance and control. ASUS Rapid Replacement 3 years warranty service with free cross shipping