One Touch Verio Flex with Colorsure Technology instantly shows when your blood glucose results are high, low or in range, compact, slim design that's easy to take with you and the accuracy one can rely on. The ranges for ColourSure Technology are preset in the monitor according to post prandial blood glucose levels recommended by the American Diabetes Association guidelines 2011. Talk to your doctor and seek advice on how the meters preset ranges may be relevant to your personal.