WRQIOO Alcohol Breathalyzer Tester, UK Professional
WRQIOO Alcohol Breathalyzer Tester, UK Professional Breathalysers, No need Mouthpieces Breathalyser with Digital LCD Screen for Home Personal or Professional Testing(Black) : 1. It’s recommended to measure after 20 minutes after drinking, and repeatthe measurement 3 times to take the average to get more accurate data 2. In addition, blow evenly and continuously for 4-5 seconds, without blowing too hard...