Digital Breathalyzer With Lcd Display Backlight Included At The Back Of The Portable Alcohol Tester Semiconductor sensor: The alcohol tester uses sensitive semiconductor sensors to provide you with accurate data, quickly determine whether you can drive, drink quietly and drive safely. confidence. AccHigh accuracy for you: The alcohol tester is used to measure the concentration of alcohol in the human body. Coverage: A blood alcohol level of 0.00-0.19% / 0.00-0.95 mg/L will also be used to test nursing mothers whether it is safe to feed their baby. Easy to use: just press the button on the tester to set up the device, switch it on and view the results. And automatically shuts off after five seconds to save power. Note: In order for the test results to be more accurate, warm-up should be performed before use. The respirator should be used 20 minutes after the last drink. After the last test, wait at least 3 minutes to start the next test.