A monitor in very clean condition, no problems, no lag, just like new. Screen size is 27 inches, resolution 2K 1440p, refresh rate 165Hz, response time is 1ms, backlit LED. AMEON 27” Flat IPS Gaming Monitor – QHD 2K 2560x1440, 165Hz Refresh Rate, 1ms Response Time, Edge-Lit LED Display, FreeSync G-Sync Support, HDMI 2.1 Port, Console Compatible, GOP27QHD165IPS - Black Screen size (inches): 27 inches Type: Monitor Resolution: 2K Refresh Rate: 165Hz Connectivity: HDMI. Type: Monitor Screen Size (in inches): 27 inches Resolution: 2K Refresh Rate: 240Hz Connectivity: DisplayPort, HDMI