Mini portable alcohol breathalyzer with police grade accuracy. It uses a precision semiconductor alcohol sensor to deliver fast, accurate results and sounds an alarm if alcohol is detected above safe levels. accuracy and fast results. Designed with a super sensitive semiconductor sensor system, this portable breathalyzer ensures your alcohol level is determined in seconds to help you decide if it is safe to drive. Dustproof design for safer testing. This breathalyzer measures the alcohol concentration in exhaled breath by blowing into it, and it is healthier and safer than a direct inlet type. This alcohol tester breathalyzer is a gift for your family and friends. Warm reminder for accurate testing. Do not use the breathalyzer until at least 20 minutes have passed since your last drink, as about 20 minutes is needed for alcohol to enter the bloodstream from the digestive organs. For a more accurate result, please wait 3 minutes between each test. Use scenarios After social events, before driving, to check if it is safe to operate a vehicle. At home or gatherings to monitor alcohol levels for family safety. As part of safety programs at work to help ensure responsible alcohol use.