Digital LCD Alcohol Breath Analyzer Detector

1 after drinking , it is recommended to wait 20 minutes before testing, because alcohol
  takes about 20 minutes into the blody from the digestive organs , and residual alcohol in
  the mouth takes time to dissipate .
2 To get a more accurate result , the distance should be at least three minutes between
   each test .
3 Do not use benzene , gasoline and thinners cleaning product ingredients tester .
4 Do not allow any liquid penetrated into the sensor.
5 to remind you , to you and the safety of others , do not drink and drive.