The ACE Instruments AFM-5 is an easy-to-use alcohol tester with an electrochemical sensor that works in conjunction with a smartphone. Before conducting a test, the "Alcofind" app must be downloaded from the App Store or Google Play and installed on the smartphone. The ACE Instruments AFM-5 measures the alcohol concentration in the breath and calculates the blood alcohol concentration from it. The measured results, when using the alcohol tester in combination with the app on your smartphone, are displayed as a 4-digit numerical value with 3 decimal places and can be interpreted 1:1 (for example, the display shows the value 0.36 = 0.36 per mille). All measurements obtained with this alcohol tester are intended as a guideline only and are not legally binding. Breath tests should be conducted using disposable mouthpieces (1 new mouthpiece should be used per test). The electrochemical sensor cell promises extremely accurate, fast, and consistent measurements of the alcohol content in your breath. The breathalyzer can be used via Bluetooth connection on almost any smartphone. The free app allows you to perform various evaluations, such as testing breath alcohol with friends, sharing measurement results, monitoring alcohol tests, setting limits, and much more. This breath alcohol tester is so compact that it can easily fit into any shirt or pants pocket. This smartphone tester is ideal for responsible individuals who rely on accurate measurements in leisure, work, or road traffic.