Easy to use portable breathing gas analyser: simply turn on the alcohol breath analyzer, insert the mouthpiece, wait 10 seconds to warm up, then blow for 3-5 seconds to get an accurate reading. Your BAC results will be displayed on the LCD screen with a bright backlight. Wait 20 minutes after drinking for the most accurate results. Upgrade with latest MEMS sensor. The breath alcohol meter features a memory function that stores up to 50 test results. Press and hold the button for 2 seconds when powering on to view stored data. The display shows the data serial number and corresponding concentration value. If no action is taken within 10 seconds, the indicator flashes "OFF" twice and the device turns off. Note: The device interface text is in English. Precise and sensitive: the alcohol tester uses advanced semiconductor detection technology to maintain accurate blood alcohol concentration readings. Quickly obtain results to determine fitness to drive. Blow duration: 3-10 seconds. Response time: less than 5 seconds. Contactless breathalyser: blower type design eliminates direct contact for improved hygiene. Features a three-color block and digital display for intuitive interpretation of results. Green display indicates no alcohol detected; red indicates elevated alcohol levels. Portable and compact: the lightweight alcohol tester fits easily in a car, handbag, backpack, or briefcase. Space-saving design ideal for weddings, parties, banquets, or other social events to support safe driving decisions. USB rechargeable with high-capacity lithium battery for extended use after full charge.