I bought this product for my boyfriend because we thought it would be fun to have at parties, too bad it doesn't work. After several beers and waiting the 20 minutes without eating he blew a 0.0. I had half a glass of wine, waited the 20 minutes and blew a 1.1, obviously the calibration is way off. I know that it's really just a novelty product but for $30 I thought that it should at least be near accurate. Get more detail about Wingman ZX Digital Breathalyzer Alcohol Tester.
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