[High Accuracy ] With professional airway design and equipped with a high-quality fuel cell sensor, the portable breath alcohol tester provides you accurate results with the detection range of 0.000% -0.19% BAC (0.0-1.9g/l), accuracy is + / - -0.01% BAC(0.1 g / l), which helps you make right decision while drinking.[3 Mouthpieces] The alcohol tester comes with 3 replacement mouthpieces five nozzles, which can be cleaned and recycled. Not sharing the mouthpieces is more hygienic, making the test results more accurate.[One-button Easy Operation ] With just one button operation, you can easily turn on the alcohol tester and perform a 10-second warm-up, 5-second response, and a very fast response test. The LCD screen directly displays the accurate test results. It is very convenient and quick to use.[Clear LCD Screen] The breathalyzer is designed to give you professional accuracy for safe drive. The LCD graphic display will indicate how inebriated you are, whether it be dangerous (over 0.05% BAC), unsafe (approx. 0.02% BAC) or safe (under 0.02% BAC).Displays "Caution" when result is within 0.02% - 0.05%, Displays "Danger" when result equals to or higher than 0.05%[Portable Size ] The alcohol tester is small and light, and can be easily put in your pocket. Making it easy to take with you anywhere you go.Features:A digital alcohol Breath Analyzer, high sensitivity.Easy to carry, tiny volume with keychain design.Automatic shutdown, Rapid Response and Recovery.LCD display gives you clearer view and digital alcohol automatically gives you audible alert.Environment and healthful. Blowing design with 3 mouthpieces for multiple users.A simple method to analyze the concentration of Alcohol in the blood in any time and any place.Specifications:Battery: 2 * AAA Alkaline Batteries (Not Included)Sensor: Advanced semiconductor oxide alcohol sensorAccuracy: 0.01% BAC (0.1g / L)Range: 0.00-0.19%BAC and 0.0-1.9g / l (Or 0.00-0.95mg / l (BRAC)Package List:1 * Alcohol Breath Tester Analyzer (Batteries Not Included)3 * Mouthpieces1 * User Manual