Fast and Accurate: The breathalyzer is powered by an extreme full-cell sensor and uses the same police technology used by hospitals, clinics and even the police. It can provide these professional organizations with BAC resultsmost accurate and reliable and can also detect traces of alcohol and reliable high BAC values up to the third period after the decimal point Auto Alarm: Breathalyzer with one touch - Easy to turn on and test in seconds. If the alcohol content is exceeded, the alarm will sound automatically. LCD Display: Professional portable breathalyzer, just press the power button for 2 seconds to start the professional breathalyzer, wait 10 seconds to heat up and blow for 5 seconds with the tester. The resultis finished in 3 seconds and displays on the LCD screen for 10 seconds. Energy efficient: auto shut-off, powered by two AAA batteries (not included, but generally available). It will automatically turn off to save power when you finish the test for 20 seconds. EXQUISITE design: compact and lightweight breathalyzer, easy to carry. You can inform the concentration of alcohol in your body in time and whether you are ok with driving. The digital breathalyzer is a fun gadget for on the goand the house. The tester slips easily into your pocket.