A breathalyzer or breathalyzer (a portmanteau of breath and analyzer/analyzer) is a device for estimating blood alcohol content (BAC) from a breath sample. It uses advanced semiconductor alcohol sensing technology to quickly take a breath sample and provide a blood alcohol content (BAC) estimate.The LCD graphic display indicate how inebriated you are, whether it be dangerous (over 0.05% bac), unsafe (. 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%.Features: new Digital Display Breath Alcohol TesterDigital alcohol tester with an audible alertColor: BlackMaterial: ABSRange: 0.00-0.19% BAC & 0.0-1.9g/lQuick response and resumeAuto power offBacklight: Red LEDAccuracy: 0.01% BAC& 0.1g/l Time: Less than 10 SecResponse Time: Less than 5 SecTest Range: 0.00-0.19% BAC & 0.0-1.9g/lWorking Environment Temperature: 10-40 CelsiusWorking Environment Humidity: 40%-90%Package Contents:1 x Breath Alcohol TesterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.