This breath alcohol tester measures alcohol concentration in the human body using a sensitive semiconductor sensor, providing quick results to help you decide if you can drive. Key features and benefits Fast, simple decision making: immediate readings to determine driving eligibility after drinking. Energy efficient and automatic: powered by two AAA alkaline batteries (not included); automatically shuts off after 5 seconds of inactivity to save power; rapid response and recovery. Clear display and alert: sensitivity digital breath analyzer with an LCD display for a clear reading and an audible alert when the result is ready. Shared use ready: blowing design with five mouthpieces supports multiple users for one device. Portable and convenient: compact size with a keychain design, easy to carry and use anywhere. What you get 1 Alcohol Breath Tester Analyzer (batteries not included) 5 mouthpieces 1 user manual Specifications and design Sensor: semiconductor ( sensitivity) Power: 2 AAA alkaline batteries (not included) Display: LCD for easy reading Autooff: after 5 seconds posttest to save energy Mouthpieces: 5 included for multiple users Size and form: compact, keychainfriendly design Practical usage scenarios Predrive check at home or after social events to assess whether it is safe to drive. Workplace safety: quick screening for operators before using potentially hazardous machinery. Vehicle and rental situations: verify eligibility before driving a car, rideshare, or rental vehicle. Notes Batteries are not included. For results, follow the user manual and use with the included mouthpieces as designed.