The highest contrast ratio of the CB240HY is 100000000:1. That's over twenty times the contrast ratio of the most common dynamic contrast ratio of 5000000:1.
This LCD screen's contrast ratio (100000000:1) is actually the best contrast ratio amongst all LCD screens of a comparable spec and age to the CB240HY.
A Mega Contrast dynamic contrast ratio is the worst contrast ratio across similar types of LCD screen.
We think you might also be interested in some of the other PC displays that have a 100000000:1 dynamic contrast ratio currently available including the G247HYL ($114.99), the 42HQL ($107.99), or the K212HQL ($114.00) all from Acer which is cheaper.