Zero Tolerance Alcohol Test Strips 0.02% Bac (Qty) Box Of 24 11-13 Month Shelf Life The Dot Approved Alco-Screen 02 That Rapid Detect, Is A Disposable, Easy To Use Alcohol Test That Can Positively Identify The Presence Of 0.02% (Or Greater) Blood Alcohol Concentrations (Bac). One Of The Attractions To This Product Is That No Special Training Is Required, If You Carefully Follow The Instructions Provided. As An Effective Method Of Zero-Tolerance Testing, The Alco-Screen 02 Operates In A Single Step As It Tests The Saliva Sample In A Clean, Non-Invasive Manner, And The Results Will Show Up In About 4 Minutes.