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🔑 Stay in control, wherever the night takes you.
The BACtrack C6 Keychain Breathalyzer delivers professional-grade BAC testing with its patented BluFire Fuel Cell Sensor, the same technology used by hospitals and law enforcement. Its innovative ZeroLine feature estimates when your blood alcohol content will return to zero, helping you make smarter decisions. Compact and portable, it fits on your keychain for on-the-go use, with optional wireless app connectivity to track your results over time. Supported by a one-year warranty, the C6 is a reliable companion for responsible socializing and personal safety.








| Best Sellers Rank | #10,446 in Health & Household ( See Top 100 in Health & Household ) #2 in Personal Breathalyzers |
| Customer Reviews | 4.2 out of 5 stars 7,078 Reviews |
J**H
Easy to use and understand; fun
I didn't want to spend a lot on a alcohol-level reader because I wasn't sure how often I'd use it and not sure how accurate any of them are so I bought this one because it was the cheapest by the company that seemed reliable and because it was so small as to be easily carried around in my pocket and because it allows you to see your results and track your history on your iPhone or Android by downloading the app. Also, I figured it was an easy thing to lose while out drinking, so didn't want to spend a hundred bucks on it. Setting up takes just a second and you can charge it with the USB port, so that's fast. It's intuitive so you can pretty much go from there. To test it, turn it on and check; it should be 0.0. Start drinking - wait 15-20 minutes - and take your first reading. The number should go up, maybe 0.01 or even 0.02. The more you drink, the higher it will go; that's how you know it's working. As to accuracy, I think so. There were two of us and mine rose in level slower than his; I weigh 30 pounds more than he does so it takes more alcohol to get me drunk than him, I think, plus I have a higher tolerance due to heavier use over the past 40 years, lol. The most important things to remember, as they will remind you in the instructions, is that you need to wait 15-20 minutes after each drink to get a good reading; if you check your level earlier, your body hasn't absorbed it enough. Don't worry that if you don't take a reading right away it won't be accurate; it's the opposite: you need to wait for it to be accurate. (Sort of the opposite of waiting 30 minutes after eating to go swimming, lol.) Also, this is for fun; no guarantees that you're not drunker than they say. Also, remember that you're expecting levels to be 0.0x, not 0.x, know what I mean? In many states, a 0.08 level will get you a DUI. NOT 0.8. If you blow a 0.8, you're already dead. So if you want to get the highest number if you're out with friends and think it's funny to see who gets drunkest, stop at 0.14, not 1.4. If you blow a 1.4, you're already dead. The only problem I've had is I haven't been able to figure out how to get the tester to switch back from when you use the app to just getting the result from the tester. You should be able to test it both ways, I think; not using the app you should be able to just test and if you want to store results and get other information, you switch the tester to a different setting. It's in the instructions but haven't gotten to it yet. The results seem accurate - the numbers went up the more I drank. Again, wait before you test or you'll get a crazy number, and that number might be really high (I think because the alcohol is still partly in your mouth or something like that). Also, breathe deep before you blow. I don't think you have to breathe really, really deep, but even if you do, it won't affect your result adversely. The higher-priced products may be more accurate and/or give you more bells and whistles, so if you plan on using it often or for purposes other than just for fun (or, if you drink a lot all the time and want to have something reliable that might last a long time, buy those). I'm glad I have this; I should've purchased one years ago. It does make me more aware of the effects of each drink and now I can measure how my level changes compared to how I feel after each drink.
K**E
Small, consistent and fun to have around
We originally bought this little breathalyzer just for fun at a party, and it was a hit. Everyone had a great time trying it, and we were impressed that it gave pretty consistent results with repeated tests. It’s small and portable, so it would be easy to take along on a night out. Beyond the novelty factor, I can see it being a useful tool for someone who wants an additional data point before deciding whether to drive. Of course, I wouldn’t use a personal breathalyzer as a guarantee that it’s safe or legal to drive—when in doubt, don’t drive—but we’ve been very pleased with it.
J**R
I watch bodycam vids on Youtube.
Nifty little device. I dont drive but got it so i can check my BAC/calculate how much alchy my body can handle. Very light weight i tossed onto my housekeys for easy carry and can help others not DWI. Breathing into it with/without mouth piece isnt complicates. I cant speak on the app since i havent connected it. So far seens decently effective and accurate. Would prefer it to have been cheaper. But i used a GC for it
M**E
Calibration requirements render this product useless
When I first received mine, I loved having it so I could have the peace of mind that I was safe to drive. However, over time (and not that long either - like a few months), it started to seem less accurate. At first I thought perhaps the drinks were weak at a particular bar and that explained why perhaps I blew a lower number than I thought I would. However, when I put it to the test while I was knowingly absolutely drunk, it showed a .01 reading. If you look deep in the instruction manual, the manufacturer suggests calibrating the unit every 6 months. Well, calibration cost $20 each time plus the hassle of having to ship it to them and wait 2-3 weeks for them to return it to you; only to have to repeat that every few months. Plus, since the calibration seems to slip a little with each use, it gives me no confidence whatsoever in the accuracy of the reading so my feeling is that it is more accurate and reliable to simply count drinks and stick to the one drink per hour rule, etc. If it did not require calibration or even if the calibration could be done easily by me at home, I would say this is a great product. However, I can not endorse it due to the need for such frequent calibration. Useless and could even be dangerous by giving people false low readings and making them think they are safe and legal to drive when they are actually not.
S**5
Wish it had USB instead of a battery
LOVE just wish it had a USB charger instead of a battery. A battery could die at anytime and then product is useless because who caries around a back up battery.. We bought for our beach house with tons of teenagers. It’s a “party” trick for them, but serious for us. No driving unless you blow. They can hide the drinking but can’t hide from this. Setting up on the phone was easy my husband said. Gives you a countdown to when to blow, beeps the whole blowing process. Beep noise stops when you need to stop blowing. Blowing is not as long as you would think, because we all have watch the DUI cop shows and people don’t blow long enough😉 Accuracy is on anything is not always as positive as you would want, but we have an indication.
A**N
Worth the money
I had a $14 breathalyzer and I decided to upgrade to this. I have an interlock in my car and I drink on the weekends, so I want to make sure I'm good by Monday for work. This thing was worth the $. The app functionality is super easy. You open the app, turn it on and select "take a test". What I like about the app is it tells you how many hours until you're sober. The app is very user friendly. Also my last breathalyzer made all kind of noise, when you blow over the limit noises go off like alarms. I ultimately put a piece of duct tape over the speaker. This one only beeps when you are done with your blow. Quiet, compact and gets the job done. It comes with 1 AAA battery. I would definitely repurchase but it comes with a 1 year warranty, you just have to go online to register. **Remember to put it in APP mode where you can use the app with it, you have to press and hold the power button for 7 seconds**
T**Y
Accurate and Reliable!!
I can’t say enough about this little device. It’s accurate, reliable, petite so you can keep in your purse, pocket, or on your keychain. I love that it has two options; one for the stand alone device and the other to connect via Bluetooth to the app. The helps tells you how long it will take to get to a certain %. It’s just, completely reliable time after time. A VERY worthwhile purchase for the price!!
M**L
Valued purchase :)
Device is small, and can be part of your keychain. Very easy to use. As far as i can tell, it is reasonably accurate. Very happy with purchase!
M**N
Fantastic. Same results as a standard police issue breathalyzer
Very accurate. Tested against a police issue breathalyzer. The same results. App based too so if you dink regular and you want to monitor your situation over weeks or months then this is a great little breathalyzer. .
L**I
Ottimo prodotto
Prodotto corrispondente alla descrizione. Imballo ottimo. Pila AAA necessaria compresa. Corredato di libretto istruzioni non in italiano ma sul sito BacTrack si trova anche in italiano. Piccolo e di ottima portabilità. Volendo anche al portachiavi ma si rischia di graffiare lo schermo. Pare funzionare molto bene. Ottima anche la funzionalità tramite App dedicata gratuita. Il prezzo è un po’ alto ma se ciò serve a salvare la patente ed evitare incidenti la spesa può valerne la pena.
C**N
Worth every penny
I actually use this little tool when I’ve been out to see if I can drive or I should wait a few hours, always wait 15 min. Without drinking anything and test 2-3 times and take the average, but it’s Very precise. It’s always in my car just in case I am somewhere I have drinking a couple of beers during an evening, just to be sure if I can drive or I should wait or get an Uber.
G**.
Werkt perfect
Na het bekijken van een testfilmpje op youtube, heb ik deze gekocht omdat bij de test dit toestel dezelfde waarden aangaf als dat van de amerikaanse politie. Zou dus correct moeten zijn… Werkt wel perfect!
I**N
Fiable y sencillo
Me ayuda a tomar decisiones antes de conducir
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