- Advanced MicroCheck® Sensor Technology - Proprietary Advanced MicroCheck® Sensor technology delivers reliable, accurate BAC results you can trust.
- Ultra-Compact Design - Fits inside a purse or pocket and can be easily used as a keychain.
- Effective Breath Capture - The innovative fold-out mouthpiece ensures only your breath goes into the breathalyzer, while ambient air, fumes, and other airborne gases are kept out.
- One Touch Operation - Simply power on your BACtrack Keychain and begin testing in seconds.
- LED Screen - BAC results are displayed on a bright, easy-to-read LED display.
- Extra Mouthpiece Covers - Includes three additional mouthpiece covers, making it easy and sanitary to test your friends and family.
- Warranty - All BACtrack breathalyzers are backed by a full one-year warranty, when purchased from an authorized retailer. Click here for warranty information.
- Products
![BACtrack S80 Pro breathalyzer](data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"%3E%3C/svg%3E)
![BACtrack Mobile Pro breathalyzer](data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 600 600"%3E%3C/svg%3E)
![collection-grid](data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1316 1316"%3E%3C/svg%3E)
- Discover
About Us
![](data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 600 400"%3E%3C/svg%3E)
Expert Center
- BACtrack Skyn
- Alcohol Monitoring
BACtrack Keychain
BACtrack Keychain
PERSONAL BREATHALYZER
$39.99
Quickly and easily estimate your BAC with the small and affordable BACtrack Keychain Breathalyzer. Powered by BACtrack's proprietary Advanced Microcheck Sensor technology, the BACtrack Keychain provides reliable and accurate BAC results you can trust. It's ultra-compact, portable keychain design makes it perfect for personal BAC testing on the go - simply blow into the fold-out mouthpiece and results are returned in seconds.
- BACtrack Keychain Breathalyzer
- Mouthpieces x3
- AAA Battery x1
- Instruction Manual
- One-year Limited Warranty
- Dimensions 1.45 x 0.55 x 2.44 inches (3.7 x 1.4 x 6.2 cm)
- Weight 2 oz. (56 grams) with batteries
- Mouthpieces Fold-out; 3 included
- Battery 1 AAA battery, included
- Battery Life Approximately 150 tests
- Sensor Technology Advanced MicroCheck®
- Sensor Accuracy +/- 0.01 at 0.02% BAC (blood alcohol content)
- Warm-Up Time 11-13 seconds
- Blowing Time 5 seconds
- Response Time 5 Seconds
- BAC Range 0.000 - 0.400% BAC
- Test Count Displays total number of tests performed
- Warranty 1 Year
Quickly and easily estimate your BAC with the small and affordable BACtrack Keychain Breathalyzer. Powered by BACtrack's proprietary Advanced Microcheck Sensor technology, the BACtrack Keychain provides reliable and accurate BAC results you can trust. It's ultra-compact, portable keychain design makes it perfect for personal BAC testing on the go - simply blow into the fold-out mouthpiece and results are returned in seconds.
- BACtrack Keychain Breathalyzer
- Mouthpieces x3
- AAA Battery x1
- Instruction Manual
- One-year Limited Warranty
- Dimensions 1.45 x 0.55 x 2.44 inches (3.7 x 1.4 x 6.2 cm)
- Weight 2 oz. (56 grams) with batteries
- Mouthpieces Fold-out; 3 included
- Battery 1 AAA battery, included
- Battery Life Approximately 150 tests
- Sensor Technology Advanced MicroCheck®
- Sensor Accuracy +/- 0.01 at 0.02% BAC (blood alcohol content)
- Warm-Up Time 11-13 seconds
- Blowing Time 5 seconds
- Response Time 5 Seconds
- BAC Range 0.000 - 0.400% BAC
- Test Count Displays total number of tests performed
- Warranty 1 Year
Free Shipping on All US Orders
We offer free shipping in the Continental US via USPS first class mail. Orders placed by 12pm PST will usually ship the same business day. You can expect to receive your order in 3-7 business days.
1 Year Warranty
If during the first year of operation any BACtrack unit ceases to function properly, we will repair or replace the defective product at no charge. To obtain warranty service, please contact customer support at 877-334-6876 or support@bactrack.com.
30-Day Money Back Guarantee
If you are not 100% satisfied with your BACtrack, we'll gladly exchange it or give you a refund for the full purchase price paid, whichever you prefer, within 30 days from the original shipping date.
Free Shipping on All US Orders
1 Year Warranty
30-Day Money Back Guarantee
Worldwide Shipping
Core Features
Ultra-Portable Keychain Design
The tiny BACtrack Keychain is perfect for BAC testing on the go, easily attaching to your keychain or fitting in a pocket or purse.
Proprietary Sensor Technology.
Unparalleled Precision.
Every BACtrack breathalyzer is engineered around the two factors that most influence accuracy: sensor type and optimal breath capture.
MicroCheck® Sensor Technology
Our consumer breathalyzers employ Advanced MicroCheck® Sensor Technology. Using a semiconductor sensor as a base, these sensors go through a patented burn-in process, which delivers more accurate and reliable results when compared to standard semiconductor sensors.
Optimal Breath Capture
Breathalyzer accuracy begins with an effective breath capture mechanism. BACtrack breathalyzers are carefully designed to exclude ambient air, fumes, and other airborne gases that could contaminate results. To enhance accuracy, all BACtrack pro-grade models feature a miniature solenoid air pump to test only air from the deep lungs.
BACtrack Keychain Breathalyzer
Quickly and easily estimate your blood alcohol content with the small and affordable BACtrack Keychain Breathalyzer. The folding mouthpiece pulls out during testing and slides back down during storage – blow for accurate BAC results in just 5-seconds. Best of all, you can’t forget your Keychain Breathalyzer as it travels with you wherever you carry your keys.
Keychain Breathalyzer Reviews
Questions and Answers
More Breathalyzers
'/%3E%3Cuse xlink:href='%23a' transform='rotate(-72)'/%3E%3Cuse xlink:href='%23a'/%3E%3Cuse xlink:href='%23a' transform='rotate(72)'/%3E%3Cuse xlink:href='%23a' transform='rotate(144)'/%3E%3C/g%3E%3Cg id='c'%3E%3Cuse xlink:href='%23b' x='-.252'/%3E%3Cuse xlink:href='%23b' x='-.126'/%3E%3Cuse xlink:href='%23b'/%3E%3Cuse xlink:href='%23b' x='.126'/%3E%3Cuse xlink:href='%23b' x='.252'/%3E%3C/g%3E%3Cg id='d'%3E%3Cuse xlink:href='%23c' x='-.063'/%3E%3Cuse xlink:href='%23b' x='.315'/%3E%3C/g%3E%3Cg id='e'%3E%3Cuse xlink:href='%23d'/%3E%3Cuse xlink:href='%23c' y='.054'/%3E%3Cuse xlink:href='%23d' y='.108'/%3E%3Cuse xlink:href='%23c' y='.162'/%3E%3C/g%3E%3Cg id='g'%3E%3Cuse xlink:href='%23e' y='-.216'/%3E%3Cuse xlink:href='%23e'/%3E%3Cuse xlink:href='%23d' y='.216'/%3E%3C/g%3E%3Cpath id='f' fill='%23B22234' d='M0 0h1235v50H0z'/%3E%3C/defs%3E%3Cpath fill='%23FFF' d='M0 0h1235v650H0z'/%3E%3Cuse xlink:href='%23f'/%3E%3Cuse xlink:href='%23f' y='100'/%3E%3Cuse xlink:href='%23f' y='200'/%3E%3Cuse xlink:href='%23f' y='300'/%3E%3Cuse xlink:href='%23f' y='400'/%3E%3Cuse xlink:href='%23f' y='500'/%3E%3Cuse xlink:href='%23f' y='600'/%3E%3Cpath fill='%233C3B6E' d='M0 0h494v350H0z'/%3E%3Cuse xlink:href='%23g' transform='matrix(650 0 0 650 247 175)'/%3E%3C/svg%3E)
