ACCURATE DETECTION: The breathalyzer tester uses a high-sensitivity semiconductor gas sensor, and the detection results are accurate. After warming up, you hear "Dee" and enter the "Blow" state for 10 seconds. At the same time the breathalyzer can detect trace amounts of alcohol and reliably handle high BAC levels, accurate to the third decimal place. EASY to USE: The alcohol tester is accompanied by a warning sound, which is easy to use, you can blow in 2-3 seconds, and your BAC result will be automatically displayed on the LED screen within 20 seconds. In addition, when the breathalyzer to test alcohol is out of power, there will be a reminder function, so you can use it with confidence. EASY to CARRY: The breathalyzer is light and small in size: 4x1.2x0.8 inches, it is simple and reliable, it can be carried anytime, easily in your pocket or purse. The breathalyzer tester is a must-have for your outing party. WHERE to USE:The breathalyzer has a wide range of uses and can be used by roadside law enforcement officers, medical workers and professional therapists, as well as to test yourself, friends, family, and the breathalyzer tester is the tool of choice at home. GUARANTEE for YOU: Our breathalyzer has undergone strict testing and is committed to providing you with first-class quality assurance. If you have any quality problems with the portable breath alcohol tester or are damaged during transportation, please in time and we will solve it for you as soon as possible question.