Manufacturer | BACtrack |
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Place of Business | SAN FRANCISCO, CA, 94133 US |
Item model number | BT-C6 |
Product Dimensions | 5.61 x 1.68 x 4.78 cm; 58.97 g |
ASIN | B079XXNBF3 |
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BACtrack C6 Keychain Breathalyzer | Professional-Grade Accuracy | Optional Wireless Smartphone Connectivity | Compatible w/ Apple iPhone, Google & Samsung Android Devices | Apple HealthKit Integration
Purchase options and add-ons
- ESTIMATE YOUR ALCOHOL LEVEL WITH PRO-GRADE ACCURACY - Powered by BACtrack's patented BluFire Fuel Cell Sensor, the C6 utilizes the same professional-grade technology trusted by hospitals, clinics, and even law enforcement.
- KNOW WHEN YOUR BAC WILL RETURN TO 0.00% - BACtrack's innovative ZeroLine technology estimates the time until your BAC is 0.00%, allowing you to quickly and easily know where you stand.
- CALL AN UBER - Remember, the only safe time to drive is when your BACtrack shows 0.00%. Anything above that? You can call an Uber directly from the App.
- OPTIONAL WIRELESS CONNECTIVITY - Use the BACtrack C6 with or without your smartphone. "Standalone Mode" delivers your BAC results directly to your C6. "App Mode" wirelessly delivers your BAC results to the BACtrack App on your smartphone. Easily switch between modes.
- ONE YEAR WARRANTY - If your BACtrack C6 ceases to function properly during the first year of operation, we will repair or replace the defective product at no charge.
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- BACtrack Breathalyzer Carrying Case (Small) | Compatible with: C6, C8, Mobile, GO, and Keychain BreathalyzersFREE Shipping by 鶹Get it by Wednesday, Jun 25
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Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product.
Product description
Powered by BACtrack's proprietary BluFire fuel cell sensor technology, the all-new for 2018 BACtrack C6 Keychain Breathalyzer is the smallest police-grade alcohol tester ever created! Roughly the size of a 9V battery and weighing only 1.5oz, the C6 delivers reliable and accurate BAC results from a tiny, yet powerful package. The C6 is also the first BACtrack to offer the new "Dual-Mode" operation. Choose "Standalone Mode" and your BAC results are delivered directly to a bright, easy-to-read OLED screen. Alternatively, choose "App Mode" and the BACtrack C6 seamlessly pairs with your smartphone via Bluetooth. Using the free BACtrack App, you can quickly and easily estimate your BAC, track your results over time, and with Zero Line, estimate when your BAC will return to 0.00%. You can even call an Uber or Lyft directly from the App if you've had too much. Perfect for any social situation, from happy hour to dinner parties, the ultra-portable BACtrack C6 key chain breathalyzer will help you and your friends drink smarter and make better decisions while drinking.
Product information
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Additional Information
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Product details
- Batteries : 1 AAA batteries required. (included)
- Is discontinued by manufacturer : No
- Product Dimensions : 5.61 x 1.68 x 4.78 cm; 58.97 g
- Date First Available : Feb. 27 2018
- Manufacturer : BACtrack
- Place of Business : SAN FRANCISCO, CA, 94133 US
- ASIN : B079XXNBF3
- Item model number : BT-C6
- 鶹 Rank: #10,324 in Health & Personal Care (See Top 100 in Health & Personal Care)
- #18 in Home Medical Tests
- Customer Reviews:
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Customer reviews
Customers say
Customers like the effectiveness, ease of use, and size of the product. They mention it's a useful device, easy to install with the Google Play apps for the optional smartphone, and has a perfect small size to attach to a keychain. Customers also like the portability and appearance. However, some customers dislike the durability, disagree on reliability, and accuracy.
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Customers are satisfied with the effectiveness of the product. They mention it's an excellent, precise, and useful device. They also say the results are valid and the device seems legit. Customers also say it's useful for them in standalone mode.
"...Haven't tried the bluetooth option - useful for me in standalone mode. No more wondering after you've had a couple of drinks." Read more
"...BAC is not so nice, maybe I shouldn't drive? Very solid and accurate. My drivers license is worth $89. I trust this one." Read more
"Very nice and useful" Read more
"An excellent, very precise and useful device." Read more
Customers like the ease of use of the product. They mention it's precise, easy to use, and handy.
"...It is a very nice looking device, it is easier to use than my old one. All very positive...." Read more
"Easy to use even when drunk af haha" Read more
"Device: Easy to use and small enough to travel everywhere with...." Read more
"...You have readings on the unit or on the App. Easy to use either way and easy to read...." Read more
Customers like the size of the product. They mention it's a perfect small size and easier to have it on a keychain.
"Device: Easy to use and small enough to travel everywhere with...." Read more
"So far, I’m very happy with the BACtrack C6. It’s small enough to keep on my keychain so that I have it at all times...." Read more
"...But they all seem to be like that. I like the size, it is nice and portable. And it is quite expensive.." Read more
"Perfect compact size. Found to be very accurate, however u MUST wait the recommended 20mins after eating or drinking for an accurate BAC reading...." Read more
Customers like the portability of the breathalyzer. They mention it fits in a keychain or pocket, is compact, and practical.
"Easy to use, fits in a keychain or pocket and it’s just good peace of mind while out in a social setting and needing to drive myself home safely" Read more
"...But they all seem to be like that. I like the size, it is nice and portable. And it is quite expensive.." Read more
"...That said it's convenient and well made." Read more
"Better than expected, great price so far accuracy is great, compact and easy to use" Read more
Customers like the appearance of the product. They mention it's a very nice-looking device and easier to use than their old one.
"...It is a very nice looking device, it is easier to use than my old one. All very positive...." Read more
"Very nice and useful" Read more
"...But they all seem to be like that. I like the size, it is nice and portable. And it is quite expensive.." Read more
"Small and cute...." Read more
Customers have mixed opinions about the reliability of the product. Some mention it works well and is great. However, others say it's hard to get it to start working, some time it needs to restart couple of times before it works.
"...All very positive. Unfortunately, the device I received did not work. Every night I have a glass of wine with dinner...." Read more
"...and comes with multiple reusable mouthpieces, which makes for a very effective and novel way to casually remind people at gatherings of what their..." Read more
"...something that was being used sporadically, this product stopped working after 18 months...." Read more
"This unit works great. Did a few test readings which seemed reasonable...." Read more
Customers have mixed opinions about the accuracy of the product. Some mention it works well and gives very accurate results, while others say it's highly prone to erroneously high readings occasionally about 10-20% too high. Some say the readings are all over the map.
"Very accurate indeed" Read more
"...now and then, I do not recommend this product as it offers poor quality readings...." Read more
"...When you test yourself using the app, it lets you try and predict the results which might help someone know how they process alcohol and make sure..." Read more
"This unit is great. You have readings on the unit or on the App. Easy to use either way and easy to read...." Read more
Customers are dissatisfied with the durability of the product. They mention the screen broke the first day on a keychain, rendering it useless. They also say the switch has broken and the breathalyzer is useless.
"...Dropped once from an average height table and the plastic case broke, fixed with tape, still works fine. App: very user friendly...." Read more
"...it 2 stars because I dropped it once (only having it for 4 days) and it broke. The app works great if u plan on using it with friends...." Read more
"Was always difficult to switch on and off. Now the switch has broken and the breathalyzer is useless. Not happy." Read more
"Had it for a year and it isn't accurate and broke already" Read more
Reviews with images

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Top reviews from Canada
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- Reviewed in Canada on May 24, 2025Verified PurchaseIt seems to work quite reliably, and comes with multiple reusable mouthpieces, which makes for a very effective and novel way to casually remind people at gatherings of what their intoxication level is. A group of your peers seeing a real number on a screen does more to prevent drinking and driving than how a person says they “feel”, every time. That’s how I use it in standalone mode. In App Mode, it syncs my personal readings to Apple Health, which makes for very responsible and health conscious, long term usage tracking.
- Reviewed in Canada on May 21, 2025Verified PurchaseLove it, had it before, lost it, purchased again
- Reviewed in Canada on May 6, 2025Verified PurchaseVery accurate indeed
- Reviewed in Canada on April 12, 2023Verified PurchaseA few years ago I bought a BACtrack Keychain Breathalyzer from 鶹. That unit served me well and I was very happy with it.
After a while, breathalyzers have to be recalibrated. This means returning the unit to the manufacturer to have the work done. After doing a Google search, I came to the conclusion that it would be cheaper to buy a new breathalyzer rather than having it recalibrated. Even more so, for someone like me, who lives in Canada, as there is the shipping cost to send the unit out to the U.S. and then have it returned to Canada.
For this reason, I bought a BACtrack C6 Keychain Breathalyzer. It is a very nice looking device, it is easier to use than my old one. All very positive. Unfortunately, the device I received did not work.
Every night I have a glass of wine with dinner. Once I received the BACtrack C6, after waiting 20 minutes after dinner, as per the instructions, I took a reading. It came back 0000. So I tried it again the next 2 nights and, this time, I waited 45 minutes before trying. Again 0000.
I thought that maybe I wasn't drinking enough wine to get a reading. To confirm that, I did something drastic, I drank 2½ ounces of rye, neat, no ice, and waited 45 minutes before taking a reading. Again, it came back 0000. I waited another ½ hour and tried it again, same result 0000. I did that 2 more days in a row, the result was always the same.
The BACtrack C6 has now been returned to 鶹.
- Reviewed in Canada on March 10, 2025Verified PurchaseThis unit works great. Did a few test readings which seemed reasonable. I tried the standalone mode as well as the app which I downloaded onto my Android phone. I really liked the app as it give you an estimate for when you'll be sober as long as you stop drinking.
- Reviewed in Canada on November 29, 2024Verified PurchaseThis thing works great. Haven't tried the bluetooth option - useful for me in standalone mode. No more wondering after you've had a couple of drinks.
- Reviewed in Canada on January 4, 2025Verified PurchaseEasy to use even when drunk af haha
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Reviewed in Canada on January 8, 2025Verified PurchaseM’a l’air fiable
Top reviews from other countries
- jfReviewed in Belgium on November 14, 2023
1.0 out of 5 stars Doesn’t work - shows ERROR at all time
Verified PurchaseVery poor product. I followed carefully the instructions and this product just doesn’t work. We couldn’t manage to have another reading than ‘ERROR’. Seriously, for that price tag, that’s quite bad.
- MartinReviewed in France on March 7, 2025
5.0 out of 5 stars Fantastic. Same results as a standard police issue breathalyzer
Verified PurchaseVery 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. .
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Isaac Pérez RománReviewed in Spain on October 29, 2023
5.0 out of 5 stars Fiable y sencillo
Verified PurchaseMe ayuda a tomar decisiones antes de conducir
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Jack BlackstoneReviewed in Germany on February 23, 2025
5.0 out of 5 stars BACtrack
Verified PurchaseFunktioniert mit und ohne App zuverlässig, und die Angaben scheinen zu stimmen; wir haben es jetzt mehrere Wochenenden ausprobiert. Auch die App-Werte, die anzeigen, wann man wieder nüchtern ist, sind stimmig. Gespeichert wird nur bei Benutzung über die App; im Gerät werden die angezeigten Alkoholwerte nicht gespeichert.
Jack BlackstoneBACtrack
Reviewed in Germany on February 23, 2025
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Ottati PietroReviewed in Italy on May 11, 2025
5.0 out of 5 stars Piccolo, compatto e super utile!
Verified PurchaseEtilometro portatile, piccolo e comodo da avere sempre con sè. Ha le dimensioni di un portachiavi. Si può usare anche connesso alla sua app. Molto utile per monitorare il livello di alcol dopo una cena per essere sicuri di non mettersi alla guida con livelli alti!
Ottati PietroPiccolo, compatto e super utile!
Reviewed in Italy on May 11, 2025
Images in this review
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