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: Digital Display Breath Alcohol Tester Digital alcohol tester with an audible alert Color: Black Material: ABS Range: 0.00-0.19% BAC & 0.0-1.9g/l Quick response and resume Auto power off Backlight: Red LED Accuracy: 0.01% BAC& 0.1g/l 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% Package Contents: 2 x Breath Alcohol Tester Only 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.