This tester uses a high-precision semiconductor alcohol sensor. It features sound warnings and color distinctions for BAC levels. The measurement range is 0.00-0.20% BAC.  Price drops from $33.99 to $29.99 to $25.49 to just $22.49 when you join Prime and clip the 10% off coupon on the product page during checkout. Shipping is free for prime members.

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