This novelty breathalyzer keychain can sense, generally speaking, the blood alcohol content (BAC) of the person breathing into it. Using 3 indicator LEDs, it senses 3 different BAC levels.

This product is meant to be used as a novelty only, we strongly suggest not using it as an official test of anyone's sobriety and take no responsibility for how it is used.

Requires 2 AAA batteries (included)