Support Center

Why does my breathalyzer display "FL" or “FLo”?

Last Updated: Apr 17, 2019 09:13AM PDT
This means the unit is not getting an adequate breath sample. Make sure that you exhale steadily into the unit for a full 6 seconds.

Some units will beep while you are breathing into them—don’t stop breathing! The beep indicates that the unit is getting a good breath sample, and it will stop when it has enough air to analyze.

Press start to restart the countdown cycle and retest. 

Please check out this video demonstration:

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