High precision test: alcohol tester uses advanced sensor technology, which allows the alcohol content to be accurately measured by 4-6 seconds of bubbles. The test result is displayed on a bright, easy-to-read LCD screen.Fast and accurate: alcohol tester can accurately display the alcohol content of the human body, thanks to a sensitive semiconductor sensor. It is recommended to use the alcohol tester 20 minutes after drinking to ensure the accuracy of the measurement.Can be used in many countries: alcohol tester can adjust the alcohol unit settings of different countries, with a measuring range of 0.00-0.20% BAC. The readings of this product are for reference only and cannot replace professional medical or legal advice. Always follow local alcohol and driving laws.Portable and energy efficient: alcohol tester has an LED battery indicator and automatically switches off after 10 seconds without pressing to save energy and extend battery life. It is small and easy to carry.Wide application: be cleaned and reused. Suitable for personal use, home and social events, as well as for certain industries that require alcohol testing, such as operating heavy equipment or driving.