this device was wired incorrectly on my vehicle, I was blowing .113 every time I turned around 1 took 2 bites of pizza, 2nd time took 2 drinks of bottled water, 3rd time ate 3 donuts, 4th time ate 1 banana, 5th time ate 1 banana. they told me to wait 20 minutes before i drive, i delivered materials to jobsites all day, I only get a 30 min. lunch you do the math. So I went from146lbs to 116lbs in less than 8 months. Supposed to cost $100.00 a month plus calibration 1x a month plus installation fee. I've paid over $1600.00 in 8 months just to get locked out again for over a week, costing me my job.