[High precision and high sensitivity] This alcohol tester is designed to measure alcohol concentration in the human body. It features a semiconductor sensor that delivers fast results within 5 seconds, helping determine fitness to drive. Provides reliable and accurate test results. [Small and portable design] This compact alcohol tester is lightweight and space-saving, making it easy to carry. Its pocket-sized design allows for convenient use anytime and anywhere, supporting safe driving decisions after alcohol consumption. [Easy to use] Simply press the power button to activate the device. The unit displays a 10-second countdown before entering test mode. Blow steadily into the detection area for 35 seconds, then read the result on the digital display. The alcohol tester includes an audible alarm that activates if alcohol is detected above preset levels. [Power saving] Powered by 2 AAA batteries (not included), the device automatically enters sleep mode 35 seconds after use and shuts down to conserve power. [Portable non-contact alcohol tester] This breathalyzer features a non-contact design for hygienic testing. There is no need to touch the devicesimply blow near the sensor inlet for fast, reliable, and accurate results. Note: For best results, carefully read the user instructions and product details before use. For improved accuracy, take the average of three consecutive tests.