Better to be safe than sorry after you've had a few drinks! Keep this portable Digital Alcohol Tester in your purse or car so you'll always know how close you are to the legal limit. The tester is very easy to use and will give a quick and accurate reading. It can detect a range of 0.00~0.19% BAC & 0.0~1.9g/l. Includes hand lanyard for easy carrying. Please Note: While this product is a useful tool in determining your BAC, it does not take the place of common sense.