Professional Digital Breathalyzer with Backlight LCD Screen Alcohol Detection Device Features： 1、Useful breathalyzer to accurately the body alcohol content(BAC) just by blowing to the instrument. 2、It can give a warning when alcohol content is over 0.050% BAC with smart MCU control. 3、Large LCD screen with backlight, convenient for night use. 4、Compact design and portable size, convenient to carry. 5、Auto power off, energy saving and easy to use. 6、Advanced flat-surfaced alcohol sensor with high sensitivity and quick response. Specification： This alcohol tester is designed for accurately measuring the body alcohol content. It is easy to use, it measures the alcohol content just by blowing to the instrument. Compact design and portable size, convenient to carry. Features: Useful breathalyzer to accurately the body alcohol content(BAC) just by blowing to the instrument. Advanced flat-surfaced alcohol sensor with high sensitivity and quick response. It can give a warning when alcohol content is over 0.050% BAC with smart MCU control. Large LCD screen with backlight, convenient for night use. Compact design and portable size, convenient to carry. Auto power off, energy saving and easy to use. NOTE: To ensure the accuracy of the measurement, it is recommended to measure 2-3 times and time interval is over 3min. Specifications: Color: Black Material: ABS LCD Size: 1.7" Measuring Range: 0.000-0.199%BAC Accuracy: ±0.01%BAC BAC Alarm: 0.050%BAC Power Supply: 3 * 1.5V AAA Batteries (not included) Item Size: 103 * 75 * 28mm / 4.06 * 2.95 * 1.10in Item Weight: 60g / 2.12oz Package Size: 15.8 * 10.5 * 5cm / 6.22 * 4.13 * 1.97in. Package Weight: 133g / 4.69oz. Package List: 1 * Alcohol Tester 5 * Mouthpieces 1 * User Manual Package List： 1 * Alcohol Tester 5 * Mouthpieces 1 * User Manual