1、Basic Parameters: The alcohol tester has an operating time of 10s warm up, a response of <5s and a test range of 0.00%‑0.19% BAC (0.0‑1.9g/L). 2、Lightweight and Compact: Made from excellent ABS material, this alcohol tester is compact and convenient, with a blowing design for quick response and recovery with selectable alarm points. 3、Automatic Switch Off: This alcohol tester provides a digital display of alcohol concentration results with a beep and an automatic switch off function to save power. 4、Complete with 5 Mouthpieces: This alcohol tester has interchangeable mouthpieces and comes with 5 mouthpieces to ensure that the device is always hygienic and ready to use when you need it. 5、Easy to Carry: This alcohol tester can be carried around with you. Perfect for drivers, law enforcement officers and anyone who wants to make sure they drive or work safely.