Drank 3 beers within an hour and got 0.000 reading. Same results with my spouse. Either defective or junk. Will call the company and see what they have to say.
Update: after sending it back 2 times to get it 鈥渃alibrated鈥 this junk is giving me the same low results. DO NOT TRUST! You鈥檒l be sorry if you get pulled over. Not even close. I can鈥檛 believe this company is standing behind this junk. You鈥檇 figure they would have sent me a new one that works but rather get these negative reviews. DO NOT BUY!!!