Easy to use: The alcohol tester features advanced sensors for precise measurement of alcohol content. Simply blow for 45 seconds, and your BAC result will appear within 3 seconds on a bright, easy-to-read LCD screen. Fast and accurate: This alcohol tester uses a sensitive semiconductor sensor to accurately detect alcohol levels in breath. Provides quick and reliable results after drinking. Measuring range: This device measures alcohol levels from 0.00% to 0.20% BAC. Once the maximum value (0.20% BAC) is reached, the reading will not increase further. For best results, perform three consecutive tests and calculate the average. Portable and energy-saving: Compact design makes it easy to carry in a bag or pocket. The device automatically powers off after 10 seconds of inactivity to conserve battery. Includes a battery level indicator for convenience.