This breathalyzer measures the concentration of alcohol in the body. Equipped with a sensitive semiconductor sensor, this portable breathalyzer quickly provides a result to determine if you can drive. Powered by two AAA batteries (not included, but commercially available), it automatically shuts off after 5 seconds of testing to save energy. Each battery allows for more than 200 tests. Compact and lightweight, this breathalyzer is easy to carry. Its pocket-sized format allows you to take it anywhere, anytime, ensuring safe driving after drinking.