BACtrack BT-S75 Professional Breathalyzer: Accurately measure your blood alcohol content between the ranges of 0.000-0.400% with this breathalyzer. The 4-digit LCD display is simple to read and understand. Do not use this product as a tool to determine whether you should operate a motor vehicle or equipment. Always have a designated driver when alcohol is being consumed.
I wanted to know my status when I go to happy hour. How many can I have in what period of time? I learned my safe and enjoyable level of intake, and now can relax knowing I am well within legal limits when I drive. Interesting to learn how long it takes to clear your BAC the morning after a party... taught my friends that just because it is morning does NOT mean you are OK to drive.