ALCOHAWK Q3I-2500 Slim Digital Breath Alcohol Tester • Uses a Sensitive Semiconductor Oxide Sensor To Quickly Test For The Presence Of Alcohol • Single-Button Operation • User Blows Into Folding Mouthpiece For An Accurate 2-Digit Blood Alcohol Concentration (Bac) Reading In Seconds • Sleek & Compact Design Makes It Great For Personal Use Or To Test Friends In Social Settings • Roughly The Size Of a Cellular Phone • Meets Dot/Nhtsa Model Specifications • For Breath Alcohol Screeners & Has Fda 510K Pre-Marketing Clearance