I bought the BAC Generation II - brand NEW for $350 NZD and used it for 6 months until my DIC court limits were lifted. Now selling second hand only 6 months old for $100 (It is selling elsewhere for between $300-$399). It saved me in court fines. It gives todays date, time and reading. And even tells you when you are likely to be 100% sober. All you need then is to Download the BAC Generation II app to your phone and you are all set. One of the most accurate personal breathalyzers on the market, the award-winning BACtrack Mobile integrates a smartphone and a police-grade breathalyzer to wirelessly bring breath alcohol content (BAC) to your Apple iPhone, Samsung brand or Android device. This ultra portable breathalyzer quickly and easily estimates your blood alcohol content, tracks your BAC results over time, and with ZeroLine , estimates when your BAC will return to 0.00%. You can even call an Uber directly from the BACtrack breathalyzer app if you've had too much. It is not only a Alcohol Detector but does Alcohol Monitoring by keeping track of all your readings. Core Features

• Xtend® Fuel Cell Sensor - The same professional-grade technology trusted by the police, and offers the highest level of accuracy and consistency in the market.
• Internal Breath Pump - Mini solenoid breath pump ensures the most accurate and efficient breath capture for testing
• Bluetooth Connectivity - Wirelessly connects to your smartphone via Bluetooth. Innovative tracking, personalization, and Apple Health integration tools. Ideal for both personal and professional use.
• The New York Times rated this device as one of the best in the world.
• ESTIMATE YOUR ALCOHOL LEVEL WITH PRO-GRADE ACCURACY