An instrument to perform a breath alcohol test with speed and precision. It is also possible to measure alcohol in the ambient air (passive), in which case a mouthpiece isn‘t required. All measurement functions can be operated with just one button to make it easier for you to perform the test. The large back-lit display is easy to understand due to its full-text messages which guide you securely through the alcohol test. An LED and audible signal complement the display and indicate the end of a measurement process.