The AlcoMate Prestige measures about five inches tall, making it a bit too large to carry around in pocket or purse, but a good size to keep in a car's console or glovebox.

Published:Caption:Photo:Josh Miller/CNET

The AlcoMate Prestige is a breath-based blood alcohol level tester.

Published:Caption:Photo:Josh Miller/CNET

The AlcoMate Prestige comes with replaceable nozzles, a sanitary means of blowing into it to run its test.

Published:Caption:Photo:Josh Miller/CNET

The monochrome display shows a countdown while the device warms up, which can take up to 2 minutes.

Published:Caption:Photo:Josh Miller/CNET

Two AA batteries power the AlcoMate Prestige, and the breath sensor is replaceable, extending the entire device's use.

Published:Caption:Photo:Josh Miller/CNET

The blood alcohol limit for driving is 0.08 in every state of the US, and the AlcoMate Prestige can tell if you are over that level.

Published:Caption:Photo:Josh Miller/CNET
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