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BACtrack C6 BT-C6 Keychain Breathalyzer1 / 6
Product guide

BACtrack C6 BT-C6 Keychain Breathalyzer

BT-C6: The BACtrack C6 is a compact keychain breathalyzer that can show results on the device or send them wirelessly to the BACtrack smartphone app. Its BluFire fuel cell sensor and ZeroLine return-to-zero estimate are manufacturer claims, while customer feedback raises concerns about reading accuracy and reliability.

At a glance

  • Choose standalone results on the C6 or wireless results in the BACtrack app.
  • Small design is described as suitable for a pocket, purse or keychain.
  • ZeroLine estimates when BAC may return to 0.00%.
  • Manufacturer recommends calibration about every 12 months, depending on device performance.
Price
$59.99Save 14%

Reference price: $69.99

Price checked: Nov 12, 2026

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Often bought together

Pros and cons

Pros

  • Standalone operation means a smartphone is not required to view results on the device.
  • Compact, lightweight dimensions suit buyers who prioritize a portable breathalyzer.
  • Includes a claimed one-year repair or replacement warranty for a device that ceases to function properly during its first year.

Cons

  • Customer feedback is mixed on reading accuracy and reliability, with reports of inaccurate readings and errors.

Technical specifications

7 specifications
Identity
BrandBACtrack
Dimensions and installation
Dimensions listed2.21 x 0.66 x 1.88 inches; 2.08 ounces
Operation and features
SensorBluFire Fuel Cell Sensor
Result display modes"Standalone Mode" delivers your BAC results directly to your C6. "App Mode" wirelessly delivers your BAC results to the BACtrack App on your smartphone.
Estimated time featureZeroLine technology estimates the time until your blood alcohol content is 0.00%.
Power
Battery1 AAA batteries required. (included)
Warranty
Warranty statedONE-YEAR WARRANTY

What to know before buying

  • The listing describes accuracy, sensor technology and the ZeroLine result as product claims, not independently verified measurements. This breathalyzer's estimate should not be treated as a guarantee that it is safe or legal to drive.

Who is it for?

A good fit for

  • Buyers who want a small breathalyzer with on-device results and an optional smartphone app.
  • People seeking an easily carried personal device and willing to account for customer concerns about inconsistent readings.

Less suited to

  • Anyone who needs a definitive determination of impairment or legal fitness to drive.
  • Buyers who require consistently reliable readings without accepting reported accuracy and error concerns.
BACtrack C6 BT-C6 Keychain Breathalyzer · photo 2
Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 7,137 ratings
  • 5 stars70%70%
  • 4 stars11%11%
  • 3 stars5%5%
  • 2 stars3%3%
  • 1 star11%11%

Customer feedback highlights ease of use and compact portability, with some finding it fun to use socially. Reported experiences with accuracy and reliability are mixed, including concerns about incorrect readings and errors, and opinions on value differ. That matters for a pocket-sized device whose listed sensor and on-device or app results do not eliminate uncertainty about individual readings.

Positive themes

  • Customers describe it as easy to use and appreciate its compact size and portability.
  • Some customers enjoy using it socially and find it fun.

Negative themes

  • Some customers report inaccurate readings and recurring errors, and reliability is a concern in feedback.

Mixed feedback

  • Opinions on product quality and value vary, with some considering it worthwhile and others not.

Frequently asked questions

Does the BACtrack C6 require a smartphone?

No. The listing says standalone mode displays results directly on the C6. App mode sends results wirelessly to the BACtrack app.

What does ZeroLine do?

The manufacturer says it estimates the time until blood alcohol content reaches 0.00%. Treat this as an estimate, not proof that driving is safe or legal.

How often should the C6 be calibrated?

The manufacturer gives a general recommendation of every 12 months, while noting that timing depends on how the device performs.

Can this breathalyzer reliably determine whether I can drive?

No device result should be treated as a guarantee of fitness to drive. Customer feedback on accuracy and reliability is mixed, so do not use it to establish that driving is safe or legal.

BACtrack C6 BT-C6 Keychain Breathalyzer · photo 3
Additional product photo 3

Alternative options

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