Brand new and high quality LCD display breathalyzer. Each unit is rigorously tested before shipping to ensure quality and safe use. High precision - Equipped with advanced semiconductor sensors for accurate readings in a short time. - Simple and convenient design lets you analyze alcohol concentration in the blood anytime and anywhere. LCD with backlight - Backlit display for night use to help you assess driving safety accurately. - After completing the test for 5 seconds, the unit automatically powers off to save power. Portable design - Lightweight and compact, a portable alcohol respirator that fits perfectly in your back pocket. Practical use scenarios - Before driving after a social event, check your BAC to decide if it is safe to operate a vehicle. - At home or on the go, verify your sobriety before taking a ride or operating equipment. - While traveling, outdoors, or at gatherings where quick on demand BAC checks are convenient and useful.