It works I would not trust any device, as far as drinking and driving. However this little tester really does work. I drank one Vodka drink and the tester gave me a yellow light. Red is the next level up.
I tried everything i.e. brushing my teeth, eating candy, even drinking milk. No fooling this tester. The light remained yellow.
Best advice don't drink and drive! duh! I don't think the CHP would let you off the hook, if you told he or she that your tester said it was ok to drive. Inexpensive, but didn't last very long. This tester seemed to work OK at first, but only lasted for about a week. Now it seems to have lost calibration and is basically useless. Save your money and buy a better unit! Great for the price This was a great stocking stuffer and lots of fun throughout the Christmas party. We didn't have anything to calibrate the results so I'm not sure how accurate it is - but it seemed reasonable. Hopefully it will be a gentle reminder not to drive after drinking.
One note - don't take a big gulp of alcohol and immediately test yourself. You'll show as highly intoxicated even after just one drink. Wait a few seconds - that seemed to produce more reasonable results. Good for only a few tries I got this device to test myself before I drove after drinking, like every other paranoid driver. It worked like a charm for about a month of two, then it ceased to calibrate when turned on, and stayed on the red <.08bac forever. So basically it became worthkess after a short while. But for fifteen bucks, what do you expect? Does not work within a week or so it completely stopped working. I hold down the button and it shows a solid red, meaning high alcohol concentration, even though no one is blowing into it.
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