"Just fold out the blow wand and exhale into it for at least 5 seconds. 2 seconds later, this amazing tool let's you know if you're within the legal limit to drive. It even houses a timer that can be set from 1 minute up to 8 hours in order to remind you when it's time for the next test.
With the National Center for Injury and Prevention Control reporting that alcohol-related motor vehicle accidents kill someone every 31 minutes, and injures someone every two minutes in the U.S., the need for safety devices including breathalyzers has never been stronger."
[David Steele]