High sensor - Equipped with a 5.0 high-sensitivity sensor delivering BAC results in about 5 seconds. Measurement range 0.00-0.19% BAC with +/- 0.01% accuracy and 99.9% resolution for reliable readings to help you make informed decisions about driving safety. Innovative smart design - Mouthpiece storage within the battery compartment keeps it clean and protected when not in use. Built-in mini flashlight provides enhanced visibility in dark environments, making it practical for nighttime or low-light checks. Compact and portable - Weighs 60 grams and measures 98 x 47 x 23 mm. Pocket-sized for purses, glove compartments, or pockets. Take it to parties, dinners, gatherings, or social events to monitor your alcohol level before driving home. User-friendly operation - Requires three AAA batteries (not included), attach the nozzle, and press start. After a 10-second warm-up countdown, blow steadily into the device for five seconds to obtain BAC results on the clear LCD display. Use scenarios - After dinner or at a party, check your BAC before driving home. - At social events to monitor intake and plan a safe ride. - In low-light environments, use the built-in flashlight for quick checks without extra gear.