Features: High precision: This alcohol detector has a highly sensitive solid-state alcohol sensor, which can quickly give a result within 5 seconds for determine whether you can drive or not. Backlit display screen: Blue backlit LCD screen, the numbers are clear and easy to read, and you can see clearly at night. Three units conversion: %BAC / BAC / mg/L three units of alcohol measurement can be converted. Easy to use: just press on the power switch for 3-5 seconds to start the professional breathalyzer, wait 15 seconds to warm it up, then blow with the tester for 5-6 seconds, the result will come out after 3 seconds and display on the LCD display for 15 seconds. 20 interchangeable tips: This breathalyzer comes with 20 interchangeable tips, you don't have to worry about forgetting to bring tips when you are in travel. Portable design: This breathalyzer is easy to hold and carry, and the white fabric pouch is convenient enough that you can take it with you at any time and never worry about it. anywhere to ensure safe driving after drinking. Features: Color: Black Material: ABS Test range: 0.000-0.199% BAC;0.000-1.990BAC;0.000-0.995mg\LAlarm point?: 0.050% BAC;0.500BAC;0.25mg\L(BrAC) Accuracy?: 0.01?% BAC?; 0.10? BAC?; 0.05?mg\L Reaction time: