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 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%. Features: Brand new Digital Display Breath Alcohol Tester A simple method to analysis Blood Alcohol Concentration at anytime and anywhere. Digital alcohol tester with an audible alert Range: 0.00-0.19% BAC & 0.0-1.9g/l Quick response and resume Auto power off Comes with four extra mouth pieces Key chain Red LED backlight Perfectly to fit into your pocket or purse Accurate Specifications: Material: ABS Color: Black Backlight: Red LED Accuracy: 0.01% BAC& 0.1g/l Warm Up Time: Less than 10 Sec Response Time: Less than 5 Sec Test Range: 0.00-0.19% BAC & 0.0-1.9g/l Working Environment Temperature: 10-40 Celsius Working Environment Humidity: 40%-90% Power Source: 2 x AAA batteries (not included) Packaging Dimensions: 118x 70 x 28mm In package: 1 x Breath Alcohol Tester 5 x Mouth pieces