#1-RATED SMARTPHONE BREATHALYZER - "Comparing smartphone breathalyzers against the $890 unit used by the California Highway Patrol, only one was spot on with the police-grade model... BACtrack Mobile." - The New York Times ESTIMATE YOUR ALCOHOL LEVEL WITH PRO-GRADE ACCURACY - Powered by BACtrack's patented Xtend Fuel Cell Sensor, BACtrack Mobile utilizes the same professional-grade technology trusted by hospitals, clinics, and even law enforcement. KNOW WHEN YOUR BAC WILL RETURN TO 0.00% - BACtrack's innovative ZeroLine technology estimates the time until your blood alcohol content is 0.00%, allowing you to quickly and easily know where you stand. SMALL & PORTABLE DESIGN - This mini handheld breathalyzer fits easily in a purse, pocket, or car, so you can always have it when you need it. ONE-YEAR WARRANTY - If your BACtrack ceases to function properly during the first year of operation, we will repair or replace the defective device.