Feature 1A simple method to analyze the concentration of Alcohol in the blood in any time and any place. 2Environment and healthful. Blowing design with five mouthpieces for multiple users. 3LCD display gives you clearer view and digital alcohol automatically gives you audible alert. 4Automatic shutdown, Rapid Response and Recovery. 5Easy to carry, tiny volume with keychain design.SpecificationFeatures: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