Police Breathalyser Self Analyzer Digital Detector Breath Alcohol Tester AUDescription: Sensitive and High Accuracy. This breath alcohol tester is used to measure concentration of the alcohol in human body. With sensitive semi conductor sensor, it can quickly give a result to judge whether you can drive or not. Simple to Use No wires, no complicated accessories, just require 2 AAA batteries, it is extremely easy to use. Just blow toward it, you can quickly get the result. Lightweight Palm size, lightweight, you can take this