Reddit mentions of AlcoHAWK PRO: Professional Edition Digital Breathalyzer Alcohol Detector

Aww man Debbie Downer! I assure you this one stayed accurate for the 9 months I had mine. The key is using it as directed. For example, one shouldn't drink or smoke 10 minutes prior and the machine does callibrate itself for 10-100 seconds prior. Granted one in a police station is much more accurate, but this is a novelty so as to have fun. Even if that's not your idea of fun, it's still a cool gadget for under $200 and more productive to this thread than your comment.

EDIT: http://www.amazon.com/AlcoHawk-Pro-Professional-Edition-Breathalyzer/dp/B000FJCX6U/ref=sr_1_18?s=hpc&ie=UTF8&qid=1406752387&sr=1-18