The F-45 Comfort model is a high-quality breathalyzer that is based on an electrochemical sensor that only reacts to ethyl alcohol. This design ensures that the results cannot be distorted by other substances or factors. The results are displayed on a two-color backlit LCD screen, ranging from 0.00 to 4.00, with a resolution of up to two decimal places. The device features optical and acoustic alarm signals that activate when the permissible blood alcohol content in Poland is exceeded. The F-45 Comfort is factory-integrated into a casing that provides additional protection for the device. The breathalyzer is equipped with an airflow sensor that guarantees the correct execution of the test. It also has a counter for all measurements taken, a function that reminds the user of the need for calibration, and a memory for the last 10 results. An undeniable advantage of the device is the mouthpiece socket on the front panel, which facilitates measurement. The breathalyzer also allows for predefined measurement units according to the user's requirements (mg/L, % BAC, g/L). The F-45 Comfort operates on two 1.5V AAA alkaline batteries. Its functionality and simple one-button operation make it intuitive to use.