Model 1101 portable breath alcohol tester adopts high-sensitivity semiconductor sensor for stable, fast BAC detection within 3 seconds. Built-in backlit LCD screen shows real-time readings clearly day and night, paired with three-color indicator lights for intuitive safety grading. Equipped with removable hygienic mouthpieces to avoid cross-contamination, it supports automatic breath induction without manual timing. When alcohol exceeds standard limits, the unit triggers audible alarm to remind drivers instantly. Made of lightweight anti-slip ABS plastic with pocket-sized compact build, it fits car storage boxes, handbags and office drawers effortlessly. Intelligent auto power-off extends battery lifespan, while internal data storage records recent test logs for review. Simple one-button operation suits all age groups, ideal for personal pre-drive self-check, corporate staff screening, fleet management and traffic auxiliary testing. Affordable, reliable and user-friendly, it effectively prevents drunk driving risks and guarantees safe daily commutes for every driver.