[Voice alarm and LCD display] The alcohol tester adopts upgraded chips and high-quality sensitive sensors for accurate measurement. The alarm parts of the British alcohol tester adopt voice alarm and LCD display. The voice broadcast function can quickly read the results without guessing the value. [Non-contact blowing, hygienic and reliable] The British alcohol tester meets strict hygiene standards and adopts a dust cover design and a dishwasher-safe mouthpiece for reusability. The alcohol tester adopts non-contact blowing measurement, which will not contaminate the measuring instrument and can be reused. [Instructions for use] Use Type-c to charge, then you need to press and hold the button for a few seconds to turn on, preheat for 10 seconds, and then blow into the alcohol tester for 3-5 seconds, and you can get real-time answers after 10 seconds. The green light indicates safety, and the yellow and red lights indicate drunk driving. [Warm Tips] After drinking, it is recommended to wait 20 minutes before using the alcohol tester. Please blow into the alcohol tester several times, at least 5 times, to ensure more accurate data. For more accurate results, please wait three minutes between each test. Lightweight and PortableThe alcohol tester can be carried in your pocket or purse anytime, anywhere. The UK alcohol breathalyzer is perfect for weddings, parties, celebrations and other social events to help you determine whether you are fit to drive.