Compact noncontact design and energy efficient Noncontact alcohol detector weighs only 25 grams, easy to carry in a handbag or pocket. The device automatically shuts down after 10 seconds of inactivity to save energy. Accurate and reliable measurements Equipped with precision semiconductor alcohol sensors for accurate results. Suitable for home use to assess alcohol levels in social situations. User friendly and fast Rechargeable 300 mAh battery with USB charging. After a 10second warmup, a 5second breath yields a result displayed on the LCD within 3 seconds. Widely applicable Suitable for authorities as well as private use, including family celebrations and events. Use scenarios Before driving after a social event at home or with friends to check if it is safe to drive. At family gatherings to help guests make informed decisions about transportation. At small private events or celebrations to monitor alcohol levels and plan safe transportation.