Dell ST2321L 23-Inch Screen LED Monitor 1920x1080 pixels Resolution provides Sharp and Brilliant Images of Text and Graphics An 7,000,000:1(Dynamic) and 1000:1 (Typical) contrast ratio helps to ensure a seamless experience Fast response time of up to 5 ms (Black to white) helps prevent ghosting in fast motion video Equipped with 250cd/m2 (typical) brightness for outstanding and clear image display Offers a horizontal viewing angle of 170 and vertical viewing angle of 160