Our Review/Thoughts

The instruction manual is mostly needed for calibration and contact information

Seems very consistent with studies that I've done concerning metabolism of alcohol

The new unit works flawlessly, and seems to be very accurate I highly recommend this unit for its quality and customer service

When the new replacement unit arrived I again contacted customer service to let them know what happened and they said thank you for letting us know of what happened and just return the original unit so they could examine what happened

With only 50 uses on mine, we compared it to the state installed device in a friends car that is calibrated regularly

Also really quick delivery Still working perfectly after one year

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