Sencor SCA BA01 V2 breathalyzer provides a quick and easy way to estimate blood alcohol content (BAC) levels. With a measuring range of 0.1 - 4%, it features a digital LCD display with a two-color backlight for clear readings. The device requires two AAA alkaline batteries and automatically shuts off after 2 minutes of inactivity. It includes three blowing tubes and offers a low battery indicator and auto-cleaning function.