Keychain Breathalyzer | Portable BAC Alcohol Tester | Blue

Works quick and easy and seemed accurate.

Works really well and accurate. Great product to have if you have had a few drinks and want to know if you're okay to drive.

I have used it once with mixed results, first test result was 0.05 BAC and the 2nd about 40 minutes later after finishing a glass of wine, though also drank a lot of water, result was 0.03% BAC. Will need to try when at home after a few drinks to see if results are within range.

I purchased this about 3 weeks ago and have used it a handful of times since. Based on third party reviews of breathalyzers, this one was rated high among economical cost and accuracy, though not accurate enough to be used in a court room. That said, it's still incredibly accurate and is very easy to use. It takes exactly 13 seconds to "warm up" before you blow into it, and the result is immediate. It comes with multiple mouth pieces for use with friends, and only has to be calibrated about once a year (unless you use it very frequently.) I put it in a tiny ziplock and keep it in my purse at all times. Perfect for making sure I've never had too much wine to legally drive, no matter how "good" i feel.

Very very inconsistent. We all tried it. One had the same reading 1 1/2 hours after drinking. Another blew .17 after two small sips of alcohol then blew 0.0 a few miniatures later.

I am in recovery and got these to hold myself accountable to my family. These are nice and compact and pretty much as accurate as the one I have to use at my counseling. Great for a piece of mind, whether using to prove you're not drinking like I am, or just checking before you drive. Can also be a good party trick or good to know when to cut yourself off. Works great and the battery life is pretty good, we got several months out of ours with used multiple times a day.

It's very cute and fun to play with. Obviously no one knows how accurate it actually is because you would need to compare its number with a cops breathalyzer to know. But it is still fun to have and to see who amongst your friends has the highest and lowest number. Fun toy.

I just had my first child and got this to help my husband and I keep better track of our BAC as we want to be responsible parents but also frequently drink socially and go to breweries. I also use it to track my BAC as I am nursing and pumping milk for my baby. It's great! Everyone metabolizes alcohol differently and there are so many variables (how much you eat, weigh, etc) it is just too hard to guess your BAC. Results seem accurate, you just have to send it in to get calibrated every so often. The negative reviews are probably random defective products (this happens with any product) and folks that need to get their device calibrated but have not. You need to read the manual to see how to properly use it. If used properly it is super helpful. I honestly think anyone who drinks alcohol should have one of these.