Customer Rating:  
Summary: Does not work
Comment: 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.
Customer Rating:
Summary: Good for only a few tries
Comment: 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?
Customer Rating:
Summary: Great for the price
Comment: 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.
Customer Rating:
Summary: Inexpensive, but didn't last very long.
Comment: 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!
Customer Rating:
Summary: It works
Comment: 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.
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