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Quick and accurate test results with a simple one-button operation Electronic airflow sensor to ensure a deep lung sample for testing 0.000 - 0.400% BAC (blood alcohol concentration) 0.01% @ 0.10% BAC sensor accuracy Semiconductor sensor with 2 digit display for accuracy Includes 9V battery, AC adapter, wrist strap, soft zipper cover, 5 mouth pieces, and hardshell case