Features: Accurate Breathalysers for Alcohol: This alcohol tester is equipped with an advanced high-precision nanotechnology sensor, delivering accurate feedback on your alcohol level via the LCD display.The breathalyzer quickly provides results to assess if you are fit to drive car, this is your most reliable and easy to use personal alcohol testing kits. To get a more reliable record, please wait for least 20 minutes after drinking. Portable Breathalyer: The mini breathalyzers for alcohol is so easy to carry! It's compact, measuring only 120*56*17mm, and weights just 58g,which is lightweight, easy to hold and carry, and can easily fit into your purse or pocket. Great for weddings, parties, banquets, or other social events, make sure you follow traffic rules and drive safely. Easy To Use: This alcohol breathalyzer tester is easy to use. It uses professional semiconductor sensor technology to quickly measure the alcohol content in the body. It takes about 20 seconds to get the result. For more accurate results, do three tests every three minutes and calculate the average. LCD Screen Display: This professional breathalyzer has a Blu-ray LCD screen and semiconductor sensor technology. It provides clear BAC test results, even in poor lighting. The alcohol tester has a three-color indicator light to show your BAC level. Green means you're safe, yellow means you're not, and red means you're drunk. 10 Reusable Mouthpieces: Your purchase includes a breathalyzer, mouthpieces, and a user manual. The mouthpieces are washable and reusable, so you can carry them with you. How to Use ? 1. Press and hold the power button for 3 seconds, the alcohol control LCD screen will light up. 2.When you successfully enter the heating mode, breathalyzer display "Warm up" and wait 10 seconds. 3.When the warm-up is complete, breathalyzer the "Blow" symbol will be displayed and a 10 second countdown will begin, indicating it is currently in test mode.After taking a deep breath, blow out the gas with normal force for 3-5 seconds. 4.Read the test results from the alcohol meter LCD display. Specifications: * Product name: High precision professional alcohol tester * Product model: MR997 * Sensors: advanced sensors for semiconductor oxide alcohols * Warm-up time: 10 seconds * Response time: 10 seconds * Operating temperature range: -10 ~ 50 * Digital display results: (% BAC / ‰ BAC / mg / L) *Power consumption: 3 "AAA" 1.5V alkaline batteries (not included) Package Included: 1x Alcohol Tester 10x Mouthpieces 1x User Manual