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Keep yourself and friends safe after the party with this BACtrack keychain breathalyzer. It's the size of a 9V battery for easy portability, and it measures blood alcohol concentration when you breathe into it. Reliable results from this BACtrack keychain breathalyzer are delivered to your smartphone or other Bluetooth-capable device. 

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Rating 4.5 out of 5 stars with 163 reviews

Rating by feature

  • Rating 4.3 out of 5 stars

  • Rating 4.4 out of 5 stars

  • Rating 4.6 out of 5 stars

89%would recommend to a friend

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The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

    BACtrack - C6 Keychain Breathalyzer - White

    Model:BT-C6
    SKU:6198603
    Your price for this item is $69.99
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