The Portable Breathalyzer is the professional-style alcohol screening device, used for the detection of alcohol in the breath. It provides a digital result indicating the approximate Blood Alcohol Content (BAC) of the test subject. Simply turn on the unit and begin testing in a matter of seconds. Download the free optional app to track your BAC and estimate when your BAC will return to 0.00%. App compatible with iPhone (iOS 13.0 or later) and Galaxy/Android (OS 4.3 or later).