They are easy to "beat" in that if you blow within 10 minutes of drinking alcohol your reading will be higher than your actual B.A.C. from the alcohol in your mouth and throat evaporating.

So if you take a swig and blow right away you'll be off the chart!

I had zero luck finding info back when I acquired mine. I had hoped to set the threshold to the newer .08% limit.

These things were marketed like vending machines to guys with territories, you couldn't just go buy one back then, and when the outfit went under so did any hope of support.

IMG_20200805_210611 (resized).jpgIMG_20200805_210652 (resized).jpg

OP, if you need the second pic in higher res, PM me your email. Pinside resizes...

LOL I just noticed the coin tray is a Rubbermaid desk drawer organizer module.