BACtrack professional device is a high-quality breathalyzer approved by NHTSA and DOT. It is portable and easily fits into a pocket. High measurement accuracy is ensured by the built-in Xtend Fuel Cell sensor, which is used by medical professionals and law enforcement agencies. Operation is controlled by just two buttons located on the body. It runs on two AA batteries. Users can switch measurement units, record readings, set threshold values, and more. All information is displayed on a small, brightly backlit screen. It also has a battery level indicator. The housing is made from durable plastic.