PROFESSIONAL BREATHALYSER: You will receive: 1 x digital breathalyser, 1 x USB cable, breathalyser with high sensitivity and accuracy. You can quickly measure your alcohol level after drinking and then decide whether to drink and drive. AUDIO ALARM: The breathalyser is equipped with an audible alarm, the alcohol test range is from 0.00% to 0.19% BAC/0.0 to 1.9 g/l. If the test result is higher than 0.03% BAC or 0.30 g/l, the breathalyser will emit a continuous beep to remind the driver not to drive. EASY TO USE: This reusable breathalyser is very easy to use and does not require a mouthpiece. Simply turn on the tester, wait 10 seconds to warm up, then blow for 5 seconds. The device displays the result quickly and clearly on the LCD screen. Note: Wait 20 minutes after consuming alcohol before using the breathalyser and perform 3 consecutive tests to ensure accuracy. COMPACT AND PORTABLE: This breathalyser is compact and portable and can be carried in any handbag or belt pouch. It also comes with a USB cable so you can plug the breathalyser into the USB port for quick charging when the battery runs out outdoors. Versatile: can be used at parties to test whether you or your friends are drunk, or as a fun tool for picking people up; suitable for use at parties, in pubs, at home and in the car; a useful gift for your family or friends who like to drink! Fast measurement readiness (10 seconds) - No mouth filling Large, backlit LCD display Accuracy: +/- 0.1 - Warning signal 0.2 and 0.5 Countdown function (ready to measure) - Battery charging via USB-C Automatic switch-off 2 seconds after measurement - Solid-state sensor