Testing with the Precision AlcoScreen is as easy as placing the pad end of the test strip in the subjects mouth for a few seconds to wet it with saliva. The AlcoScreen requires such a small amount of saliva to activate the test even subjects with dry mouth can be tested successfully. Results are visible within two minutes after wetting with saliva. Highly sensitive detection method to detect blood alcohol concentration in saliva Perfect Alternative to other Expensive & Bulky Alcohol Testers Simple one step 2 minute test No False Positives. Requires no instrumentation or special training to be used effectively Convenient enough to be used at any time, any place