Step 1:
This product is not a self test.
You should never test yourself. Alcohol impairs judgment.
Have someone who has not been drinking help you conduct the test and read the results. Wait 15 minutes after last drink, if you cannot wait, rinse your mouth with water before taking the test. This removes the alcohol vapors in your mouth that could cause a false positive result.

Step 2:
Squeeze the middle of the Tester between thumb and forefinger to break inner glass tube.
SQUEEZE ONLY ONCE, DO NOT CRUSH OR BEND TUBE.
Use the Tester immediately.

Step 3:
Subject should hold Tester vertically so arrows on “BLOW” end are pointing down. Subject should then BLOW/EXALE very hard into tube, in one continuous breath, for 12 seconds. Shake the tester side-to-side to distribute the crystals evenly in Tester’s window. Lay Tester on flat surface and wait 2 minutes.

Step 4:
Read the results.
Positive Results: Most of crystals are a light green/blue, blue/green cast. This shows that the breath alcohol is at or above the level printed on the Tester.

Negative Results: Most of the crystals are light yellow. This shows that breath alcohol is below the printed level on the Tester.