Fast and accurate: The breathalyzer features a high-quality fuel cell sensor that utilizes the same technology used in professional settings such as hospitals, clinics, and law enforcement. It delivers precise and reliable blood alcohol concentration (BAC) results, capable of detecting trace amounts of alcohol and providing accurate readings up to three decimal places. Auto alarm function: One-touch operation for quick and easy testing. The device automatically sounds an alert if the BAC level exceeds the preset threshold. LCD display: This portable breathalyzer is simple to use—press and hold the power button for 2 seconds to start. Wait 10 seconds for warm-up, then blow steadily into the mouthpiece for 5 seconds. Results are displayed on the LCD screen within 3 seconds and remain visible for 10 seconds. Energy efficient design: Automatically powers down after 20 seconds of inactivity to conserve battery life. Powered by two AAA batteries (not included). Sleek and compact: Lightweight and easy to carry, this breathalyzer allows you to quickly check your alcohol levels and make informed decisions about driving. Ideal for personal use at home or on the go. The slim design fits easily into a pocket or bag.