It is generally known that an accurate alcohol breath tester can be used as a law-enforcement inspection tool to effectively reduce the serious traffic accidents. Now, we will introduce a functional Digital Alcohol Tester to you. Designed with audible alert and digital LCD display, this alcohol tester is easy to use, with quick response and resume. With compact size and key chain design, it is very easy to carry when going out. Features - Color: grey. - Housing material: durable hard plastic. - and digital Alcohol breath tester. - Portable gun-shaped appearance design, very unique and attractive. - A simple method to measure and analysis Blood Alcohol Concentration (BAC) at anytime and anywhere. - Digital alcohol tester with audible alert. - Quick response and resume. - Auto power off . - It is powered by 2 * 1.5V AAA alkaline batteries (not included). - Using mouthpiece for test, so it is more accurate then other style tester. - Come with a key chain for convenient to carry. - Come with 4 additional mouthpieces for replacement. Specifications - Digital LCD display to show the test result. - Sensor: advanced semiconductor oxide alcohol sensor. - Range: 0.00%~0.19% BAC (0.0~1.9g/l). - Power input: 2 * 1.5V AAA alkaline batteries (not included). - Operating time: warm up: 10s; response: lt;5s. Cautions - When after drinking, it is recommended to last after 20 minutes, because 20 minutes is approximate for alcohol to be absorbed into blood from the digestive organs, and residual alcohol remaining in the mouth takes this long to dissipate. - For accurate result, do not repeat next test within 3 minutes after last time.