Compact and portable: This portable breathalyzer tester is easy to carry and use on the go, ensuring accurate and reliable detection anytime, anywhere. zero sensitivity: With a strong antiinterference function, this digital tester provides precise and stable performance for more accurate and reliable results. LED digital display: The clear and easytoread LED display on this portable breathalyzer makes it simple to read your levels and stay safe on the road. Longlasting battery life: Equipped with a 300mA battery, this portable tester offers stable performance and extended usage time. Use scenarios Before driving or operating equipment to verify your breath alcohol level and ensure safe operation. At social events or gatherings to monitor your BAC and make informed decisions about further drinking or transportation. While traveling, commuting, or performing outdoor work where a quick, measurement aids safety and responsibility.