Alcohol Tester, KEYNICE Semi-Conductor Breathalyzer Digital Breath Analyzer, Alcohol Breath Tester with 4 Pcs Mouthpieces, LCD Display Backlight Perfect for Night Reading, Include 3 AAA Batteries

Great little product for the household, instructions very easy to follow, works well and lets you know if you are over the legal driving limit in seconds.Good quality as the same as the higher price alcohol tester.Very simple to use, turn it on, wait until it's ready, blow into the tube until the beep stops and check the reading. I think it's ok as a morning after checking system.Nice compact unit and the blow bits are reusable, all in all a good buy.

My husband uses this to make sure he’s ok to drive the morning after he’s had a drink the night before. It’s easy to use and seems accurate he hopes!!!

ok for a bit of fun but not to be relied upon as an accurate measurement for your BAC.