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 five 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 sensor Accuracy: 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 Weight: 51g/1.8oz Package List: 1 * Alcohol Breath Tester Analyzer (Batteries Not Included) 5 * Mouthpieces 1 * User Manual 1¡¢A simple method to analyze the concentration of Alcohol in the blood in any time and any place. 2¡¢Environment and healthful. Blowing design with five mouthpieces for multiple users. 3¡¢LCD display gives you clearer view and digital alcohol automatically gives you audible alert. 4¡¢Automatic shutdown, Rapid Response and Recovery. 5¡¢Easy to carry, tiny volume with keychain design.