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Be sure to check out our full guide to the best USB car chargers while you're at it

One important caveat: The MinusA2 has an ionization setting, which our experts don't recommend with any air purifier, since ionizers can release small amounts of ozone (an irritant that can exacerbate existing respiratory conditions) and the science on ionizer efficacy and safety is still inconclusive

Theres also a child lock to prevent little hands from making unwanted adjustments

Each end is sealed with a perforated plastic or ceramic cap

They have the boldest, fullest-bodied blends on the Canadian market, and at Native Smokes 4 Less you can buy all of them at tax-exempt prices

Ive tested dozens of units with professional-grade particle counters, not consumer gadgets