This dual LCD display Digital Breath Alcohol Tester is CE and ROHS approved. Thanks to a state of the art micro chip technology, you can accurately and easily analyze your breath/blood for alcohol levels in seconds. Simply hold the power button and exhale into the breathalyzer, then wait for the result being displayed on the screen. It provides accurate, reliable results from 0.000% - 0.199% BAC & & 0.000 - 0.995 mg/L BRAC with clear LCD backlit. High sensitive and quick response make more convenient to use. In addition, it can also work as an alarm, clock, temperature, and countdown timer. Automatically shut off when not in used to increase batteries life. Its compact size makes it easy to carry in a pocket, perfect for testing yourself as well as your friends and family. Dual LCD display LCD screen with backlight for night use Quick response and resume capacity Advanced alcohol sensor with high sensitive and quick response Other function It has temperature measuring, timing and alarm time functions. Auto power off Auto power off for saving batteries Easy to use Measure the alcohol content just by blowing into the instrument Battery Powered by 2 x AAA alkaline batteries (not included). Specifications Type Digital Breath Alcohol Tester Display Dual LCD backlit Function Breathalyzer, alarm, clock, temperature measurer, and countdown timer Sensor Advanced semiconductor oxide alcohol sensor Range 0.0% -0.19% BAC (0.00-0.95mg/L BRAC) Test Accuracy 0.01% BAC (0.05mg/L BRAC) Power 2 x 1.5V "AAA" alkaline battery (not included) Operating Time Warm up 15-30s Response Time