This BACtrack S80 Professional breathalyzer is DOT-/NHTSA- tested and approved and designed for professionals and users who requires dependable BAC (blood alcohol content) results. Police-grade Xtend Fuel Cell Sensor Technology ensures accurate readings.
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I bought this item to obviously be able to check people's alcohol levels, and I have to say it is easy to use and tests accurate. However, the restrictions of having to wait 20 minutes after eating drinking or smoking is a pain. The mouth pieces it comes with are great and easy to identify which way to place them into the machine, but the replacement ones do not have a ball in them so you have to pay more attention to what you are doing. I have used this 20-30 times so far without any problem and have shown other people how to use it also without any difficulty. I wouldn't rely on it vs. one a cop would carry, but it does seem accurate and it super easy to use and seems really durable. I love the little case it comes in that I can throw every thing I need in one spot. If you need one or just want one, check this out.