GERUI Alcohol Tester, Breathalyser Police Accurate, Per Mille Tester with 20 Mouthpieces, Professional Portable LED Display Digital Fast

Measuring range: this alcohol meter has an alcohol measuring range of 0.00-0.19% BAC (0.0-1.9 g/l). Note: For more accurate results, please test 3 times in a row and take the average value. Easy to use: insert two AAA batteries (not included). Turn on the breathalyzer, simply press the power switch for 2 seconds to start the breathalyzer, wait 10 seconds to warm up, and then blow with the tester for 5 seconds. The results are completed within 3 seconds and are displayed on the LCD screen for 10 seconds. Automatic alarm function: test result is above 0.05% BAC or or 0.5g/l, the tester will give an alarm. The breathalyser police accuracy turns off automatically 10 seconds after completing the test. Professional alcohol tester: with professional airway design and high-precision semiconductor sensor, the alcohol tester can accurately display the alcohol content of the human body. It can quickly provide a result to judge whether you can drive or not. Very portable: it comes with 30 interchangeable mouthpieces that can be cleaned and reused. In a very small space.