High accuracy: The Belyalyzer alcohol tester maintains accuracy with regular calibration, delivering reliable results in the 0.00-0.19% BAC range. Its advanced sensor technology provides dependable measurements for peace of mind. Safety and control: Safe, ergonomic design with a one-button start and stop function adds an extra layer of user security, allowing you to power it off anytime during use. Versatile use: Multifunctional for detecting alcohol content for home safety and workplace monitoring. Powered by 2 x 1.5V AAA batteries (not included). Easy operation: One-button operation yields precise readings on a clear LCD display, providing a quick and effortless testing experience. Use scenarios: - Before driving home or departing for the day to ensure safe limits - Workplace safety monitoring and compliance checks - Quick checks at social events or family gatherings to plan responsibly