The Asus ML248 has a maximum contrast ratio of 100000000:1. That's over five times the contrast ratio of the most common dynamic contrast ratio of 20000000:1.
This PC monitor's contrast ratio (100000000:1) is in fact the best contrast ratio across all PC monitors of a comparable type and age to the ML248.
A Mega Contrast dynamic contrast ratio is the worst contrast ratio amongst similar types of PC monitor.
We think you might also be interested in some of the alternative PC monitors that have a 100000000:1 dynamic contrast ratio currently available including cheaper flatpanel monitors such as the 271HL (£149.99), or the B236HL (£139.98) both from Acer.