Compact and portable: this breathalyzer is easy to carry and use on the go, delivering accurate and reliable detection anytime and anywhere. High zero sensitivity: with a strong anti-interference function, this digital tester offers precise and stable performance for more accurate and reliable results. LED digital display: the clear, easy-to-read LED display lets you measure your alcohol level quickly and stay safe on the go. Long battery life: equipped with a 300mA battery, this portable tester provides stable performance and longer use time. Practical uses: - Before driving after a social event, quickly check your alcohol level to decide if you are safe to operate a vehicle. - On safety-critical work sites, verify sobriety before using machinery or performing high-risk tasks. - At parties or travel, perform a quick BAC check to plan your next steps responsibly.