Easy to use: the alcohol tester police accurate for alcohol tester uses advanced sensors to allow precise measurements of your alcohol content. Blow for 4-5 seconds and your BAC results will be displayed 3 seconds later on a bright, easy-to-read LCD screen. Fast and precision: the alcohol tester alkomat uses a sensitive dedicated semiconductor sensor that can accurately display the alcohol content of the human body. After drinking, you can quickly measure the alcohol content with police accuracy. Measuring range: this alcohol tester has an alcohol measuring range of 0.00-0.20 BAC. The result of the alcohol test reaches the maximum value (0.20 BAC) and the value no longer increases. Even if the amount of alcohol consumption increases, the test result still shows 0.20 BAC. Note: For more accurate results, please test 3 times in a row and take the average value. Portable and energy-saving: this professional alcohol knife alcohol test takes up little space and can be easily carried in your handbag or bag. The breathing alcohol tester automatically turns off 10 seconds after completing the test to save power. In addition, the breath alcohol meter has a battery level indicator which is very useful.