UPERFECT UPGRADED F22 Portable laptop Monitor adopts 350 cd/m2 brightness, 800:1 Contrast Ratio higher than other brands bring you a clearer and more delicate visual experience than general monitor. The high brightness makes HDR effect stronger, the bright part brighter, and the picture will has a strong sense of three-dimensional and transparency. On the other hands, the ambient light will has a small impact. No matter in the day or at night, in the sun or in rainy and snowy days, high brightness TVs can bring clearer pictures. Therefore, brightness has become an important parameter to measure the image quality of Monitor. Contrast is the ratio of the maximum brightness to the minimum brightness of the screen. The larger the ratio, the more the gradation from black to white, and the richer the color expression.