Hey! So about the BACtrack C6 Keychain Breathalyzer you're asking about—whether it needs calibration or not.
According to what we've found, it does need periodic calibration to stay accurate, which is pretty common with breathalyzers.
The manufacturer suggests calibrating it about every 12 months if you're using it normally. But if you're using it a lot, you might want to think about getting it calibrated more often.
The tricky part is that calibration isn't something you can do yourself. You'd need to send it back to BACtrack or an authorized place to have the sensors reset. It's a bit of upkeep, but it's key to making sure the readings are spot on.
Hope that clears things up!
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Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from 3 retailers, and a look at hundreds of user reviews to give you a well-rounded picture.
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