It is accurate to .005% to under .1% BAC = blood alcohol content.
With Regular use it is calibrated once every 12 month. Heavy use with high BAC readings may be calibrated sooner.
The detection range is zero BAC to .4% BAC
The battery is rechargeable and performs up to 500 tests
Taking a breath test= wait 30 minutes after last drink or 15 minutes after a cigarette.
This is a reliable breathalyzer that is accurate. This is what you need to comply with a zero BAC , the interlock condition and use this device not to re offend by checking your BAC after drinking.
Cost is $220 Book on line or ring 96543321