... more accurately, a test in 2 minutes, don't repeat measurement.In test 20 minutes do not smoke ... smoke.Pores can not enter the liquid.Don't block the outlet. Postscript Driving after drinking and ... general, if just drinking wine, immediately alcohol test, display values may be relatively high, but 20~30 minutes ... drinking, no matter how many, had better don't drive, this is be responsible for others, is ...