Don't drive under the influence!
There's no excuse for it -- especially when this keychain breathalyzer indicates you need to avoid driving. Three optional mouthpieces are included for multiple users, so if you're with friends, you can all test yourselves. This breathalyzer provides highly accurate results with a semi-conductor oxide sensor; results will display 0.0 - 0.40% BAC in just seconds. Compact size fits easily in your pocket or purse.
Dimensions with mouthpiece folded are just 1.45"x .55" x 2.44".
Requires one AAA battery (not included).
Bactrack Keychain Breathalyzer