Acer PEO 31.5'' Monitor has Ultra High Definition display quality with a screen resolution of 3840 x 2160. The 31.5'' wide display provides an excellent blend of colors and an enjoyable viewing experience with clarity and improved detailing. It produces high-quality images that enhance the efficiency of the monitor. Due to the latest LCD technologies, this monitor gives the clearest and accurate images. The native screen refresh rate is 60 Hz. The response time of this monitor is 4ms and brightness is 550. It has in-built HDMI and VGA video inputs with 2 HDMI ports. The aspect ratio is 16:9 and the contrast ratio is 100000000:1. It comes with 90-day Limited Warranty.