This alcohol monitoring device is designed to accurately measure the level of alcohol in the body. It is easy to use, it measures the alcohol content simply by blowing on the instrument. Compact design and portable size, easy to carry. Features: A useful breathalyzer to accurately measure body alcohol content (BAC) by simply blowing on the instrument. Advanced flat surface alcohol sensor with high sensitivity and fast response. It can warn when the blood alcohol level is above 0.050% with intelligent control of the microcontroller. Large LCD screen with backlight, convenient for night use. Compact design and portable size, easy to carry. Automatic power off, energy saving and easy to use. NOTE: To ensure the measurement accuracy, it is recommended to measure 2-3 times and the time interval is greater than 3 minutes. Features: Color black Material: ABS LCD screen 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.