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(1459 ratings)
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BACtrack Keychain Breathalyzer (Black) | Ultra-Portable Pocket Keyring Alcohol Tester for Personal Use

3.9 3.9 out of 5 stars 4,829 ratings

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1
Black

Purchase options and add-ons

  • QUICKLY & EASILY ESTIMATE YOUR BAC - Proprietary Advanced MicroCheck Sensor technology delivers reliable, accurate BAC results you can trust
  • EASY TO USE - One button operation means you simply power on your keychain breathalyzer and begin testing in seconds. It's that easy!
  • TAKE IT WITH YOU ANYWHERE - The ultra-compact BACtrack breathalyzer keychain easily fits in a pocket or purse, making it a great portable breathalyzer for any occasion.
  • OPTIMAL BREATH CAPTURE - The innovative fold-out mouthpiece ensures only your breath goes into the alcohol tester, while other airborne pollutants are kept out.

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From the brand


From the manufacturer

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BACtrack S80 Professional Breathalyzer BACtrack Trace Professional Breathalyzer BACtrack Mobile Smartphone Breathalyzer BACtrack C8 Personal Breathalyzer BACtrack C6 Keychain Breathalyzer BACtrack Keychain Breathalyzer
BACtrack S80 BACtrack Trace BACtrack Mobile BACtrack C8 BACtrack C6 BACtrack Keychain
Customer Reviews
4.5 out of 5 stars
7,020
4.4 out of 5 stars
1,776
4.3 out of 5 stars
1,385
4.4 out of 5 stars
2,737
4.3 out of 5 stars
5,677
3.9 out of 5 stars
4,829
Ideal Use Personal & Professional Personal & Professional Personal & Professional Personal Personal Personal
Alcohol Sensor Type Platinum Fuel Cell Platinum Fuel Cell Platinum Fuel Cell Platinum Fuel Cell Platinum Fuel Cell Semiconductor
Professional-Grade Accuracy
Wireless Connectivity to iOS & Android Devices ✓ - Required ✓ - Optional ✓ - Optional
ZeroLine Technology - Estimates Time to 0.00% BAC ✓ - App Only ✓ - App & Device ✓ - App Only
Advanced User Controls for Professional Testing Environments
Battery Type 2 x AA batteries 2 x AAA batteries Micro-USB Rechargeable Lithium Ion 1 x AAA battery 1 x AAA battery 1 x AAA battery
Size (L x W x H) 2.00" x 0.75" x 4.75" 1.87" x 0.63" x 4.25" 1.75" x 0.63" x 2.75" 2.50" x 0.66" x 2.20" 2.21" x 0.66" x 1.88" 1.45" x 0.55" x 2.40"
Weight (including battery) 136g 85g 57g 57g 57g 57g

Product Description

Backtrack breathalyzer keychain

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 6 x 1.25 x 8.25 inches; 3.2 ounces
  • Item model number ‏ : ‎ BT-KC10
  • Department ‏ : ‎ unisex-adult
  • Batteries ‏ : ‎ 1 AAA batteries required. (included)
  • Date First Available ‏ : ‎ November 7, 2011
  • Manufacturer ‏ : ‎ True Fabrication
  • ASIN ‏ : ‎ B006536ZXC
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    3.9 3.9 out of 5 stars 4,829 ratings

Important information

Legal Disclaimer

Estimates & results may vary. Product must be calibrated periodically as recommended in the instructions.

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

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Customer reviews

3.9 out of 5 stars
3.9 out of 5
4,829 global ratings

Customers say

Customers like the ease of use, portability, and fun of the product. They mention that the instructions are pretty specific, and it's ready for immediate use. They also like the portability and usefulness. However, some customers dislike the readability. Opinions are mixed on performance, quality, and accuracy.

AI-generated from the text of customer reviews

110 customers mention97 positive13 negative

Customers find the product simple to use, with specific instructions. They also say it's convenient and ready for immediate use.

"...Ready for immediate use (no warm-up time) once I turn it on, it delivers results within 13 seconds...." Read more

"...It comes with a Duracell AAA battery as pictured. The instruction manual is clearly written and the table describing effects of increasing levels of..." Read more

"...It arrived quickly, and is small and simple to use...." Read more

"Surprisingly accurate and it is easy to use" Read more

110 customers mention107 positive3 negative

Customers find the breathalyzer to be fun when out with their drinking buddies. They say it's useful and worth the good times. Customers also mention that it'll make a great party game.

"...It matched the table perfectly. And it's very consistent. If I repeat a test, it is always within 0.01 of the last...." Read more

"It has a low battery life and sometimes doesnt work, but it can be useful and fun" Read more

"...It was pretty hilarious...." Read more

"...This one makes for great fun when out with your drinking buddies." Read more

92 customers mention84 positive8 negative

Customers find the breathalyzer easy to use and small enough to carry. They say it's not too small or too big, and can be tossed into any size of purse. Customers also say it fits the bill perfectly as a nifty trinket.

"...I think everyone needs one. It can be tossed into any size of purse, attached to any key chain and even tossed into any pocket...." Read more

"...It arrived quickly, and is small and simple to use...." Read more

"...Pros:Inexpensive (especially compared to DWI costs)Small, fits in purseHas worked well every it has been used..." Read more

"...It’s pretty small (almost 2.5in length and 1.5in across) also which can be good or bad depending on what you’re..." Read more

59 customers mention59 positive0 negative

Customers find the product very handy, wonderful, and useful for going out. They say it's a great little gadget and works well. Customers also mention that it'll be great for personal use so you know when you can and can't be making. They also say it’s an educational gadget that they would recommend.

"...Wonderful device to keep at hand when out with your friends or any occasion. Better to have at hand then behind bars. 🍸..." Read more

"...the knowledge to understand what factors are at play, it's a damned educational gadget that I would recommend to anyone interested in some..." Read more

"...I use this product because it's convenient. This thing is easily stored in the pocket of my jeans, along with my car keys...." Read more

"...pace of drinking is unsafe I highly recommend it as a deterrent, learning tool, and peace of mind." Read more

531 customers mention233 positive298 negative

Customers are mixed about the performance of the product. Some mention that it works relatively well, giving consistent results. However, others say that it didn't work initially, became non-functional for a relatively long period, and does not deliver.

"...I stopped. Using it after a year and tried again and now it won’t work. I opens it and cleaned it out nothing...." Read more

"Works great in a pinch. You know when you need to call for taxi instead of being behind the wheel...." Read more

"...alone for several hours, I could do a test, but then it was unable to do another test. Sometimes I could do a test and it gave me the 'Lo' message...." Read more

"...In practice, it is functional but you have to not eat/drink for 1 hour, take at least 2 measurements 10-15 minutes apart and the average of this is..." Read more

378 customers mention149 positive229 negative

Customers are mixed about the quality of the breathalyzer. Some mention that it's well worth the price, reliable, and well-made for the price. However, others say that it is not the best product for your money, it'll fail on you after a few beers, and the chain that's attached on broke off.

"Bought this for my son. He had it for two weeks and the keychain broke off of the base in that short time...." Read more

"The BACtrack is a convenient breathalyzer and it's consistently delivered reliable readings compared to a borrowed, higher priced breathalyzer I..." Read more

"It's not the best product for your money, from what I've read of other breathalyzers...." Read more

"...Its nice for the money, but wouldnt recommend. The accuracy was never good without averaging, but the dealbreaker is really the low product life...." Read more

353 customers mention173 positive180 negative

Customers are mixed about the accuracy of the breathalyzer. Some mention it's extremely accurate and can detect the presence of alcohol, while others say that it only ever gives accurate readings if you wait at least 10 minutes between uses.

"The BACtrack is a convenient breathalyzer and it's consistently delivered reliable readings compared to a borrowed, higher priced breathalyzer I..." Read more

"So I liked the idea of a keychain breathalyzer, but its not as convenient or accurate as advertised. I do not drive past 0.06 and this is not..." Read more

"...The BACtrack Keychain was definitely a cost-effective, reasonably-accurate solution for me at the time...." Read more

"...This is probably not the most accurate measurement and has on several occasions told me I was way higher or lower than I possibly could've been...." Read more

63 customers mention6 positive57 negative

Customers are dissatisfied with the readability of the product. They mention that it struggles to give an accurate reading, and gives a 0.00 reading multiple times. Some customers also say that the product doesn't work properly and doesn' t give accurate results.

"...It is not a completely accutate reading and you should not expect that of a product in this category and price range...." Read more

"...to blow into it right after taking a sip of alcohol or the BAC will read really high. You have to take a few minutes before testing it...." Read more

"...instructions to wait 20 min after last drink or the readings displayed will be very high...." Read more

"...After a few months of use the reading become wildly inaccurate...." Read more

It works, but take more than 2 measurements and wait at least 20-30 minutes before use
3 Stars
It works, but take more than 2 measurements and wait at least 20-30 minutes before use
So I liked the idea of a keychain breathalyzer, but its not as convenient or accurate as advertised. I do not drive past 0.06 and this is not at all suitable for someone who wants to pace themselves and would be dangerous for those who drive just under the legal limit.The variance between measurements is easily +/- 0.02. You can read 0.08 15 minutes after one beer and it will fall to 0.00 after 30 minutes.Use of mouthwash takes 30 minutes to go from 0.11 to 0. As you can see, the suggested 15 minute interval in manual is insufficient for a completely accurate reading.I am not sure if my expectations were too high for the product, but it is better than nothing, but there are superior products on the market. In practice, it is functional but you have to not eat/drink for 1 hour, take at least 2 measurements 10-15 minutes apart and the average of this is somewhat reliable. A typical reading series without food or drink waiting 5 minutes may look like; 0.08 ,0.06,0.10, 0.08,0.08,0.06,0.08,0.06 so I would infer this would be 0.075 but the 95% CI would be 0.06-0.092. Its fun having a cheap product that correlates with BAX, but if your intention is to keep yourself out of trouble while driving close to the limit you should probably invest a bit more unless you enjoy doing drunk statistics. If you have this good of a memory on your nights out, you could probably just get the same estimate from writing down your servings and using an online calculator with body weight. Unfortunately people who drink more than one type of beverage will usually not know the alcohol content or remember how many, so this fills that gap, but I would advise spending a few more bucks for the better one.I've also seen false positives. After testing, I accidentally pressed the button without blowing on it and received a rating of 0.02, suggesting the device does not check if you are using it appropriately and assumes you are.Update:Died about a year later so I decided to go with another brand. Its nice for the money, but wouldnt recommend. The accuracy was never good without averaging, but the dealbreaker is really the low product life. I had assumed that semiconductor would be more durable but less accurate, but its really not great on durability aspect either.
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3.0 out of 5 stars It works, but take more than 2 measurements and wait at least 20-30 minutes before use
Reviewed in the United States on November 27, 2021
So I liked the idea of a keychain breathalyzer, but its not as convenient or accurate as advertised.
I do not drive past 0.06 and this is not at all suitable for someone who wants to pace themselves and would be dangerous for those who drive just under the legal limit.
The variance between measurements is easily +/- 0.02. You can read 0.08 15 minutes after one beer and it will fall to 0.00 after 30 minutes.
Use of mouthwash takes 30 minutes to go from 0.11 to 0. As you can see, the suggested 15 minute interval in manual is insufficient for a completely accurate reading.
I am not sure if my expectations were too high for the product, but it is better than nothing, but there are superior products on the market. In practice, it is functional but you have to not eat/drink for 1 hour, take at least 2 measurements 10-15 minutes apart and the average of this is somewhat reliable. A typical reading series without food or drink waiting 5 minutes may look like; 0.08 ,0.06,0.10, 0.08,0.08,0.06,0.08,0.06 so I would infer this would be 0.075 but the 95% CI would be 0.06-0.092. Its fun having a cheap product that correlates with BAX, but if your intention is to keep yourself out of trouble while driving close to the limit you should probably invest a bit more unless you enjoy doing drunk statistics. If you have this good of a memory on your nights out, you could probably just get the same estimate from writing down your servings and using an online calculator with body weight. Unfortunately people who drink more than one type of beverage will usually not know the alcohol content or remember how many, so this fills that gap, but I would advise spending a few more bucks for the better one.
I've also seen false positives. After testing, I accidentally pressed the button without blowing on it and received a rating of 0.02, suggesting the device does not check if you are using it appropriately and assumes you are.

Update:
Died about a year later so I decided to go with another brand. Its nice for the money, but wouldnt recommend. The accuracy was never good without averaging, but the dealbreaker is really the low product life. I had assumed that semiconductor would be more durable but less accurate, but its really not great on durability aspect either.
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Customer imageCustomer image
14 people found this helpful
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Reviewed in the United States on March 10, 2014
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Reviewed in the United States on October 14, 2023
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