Act responsibly: Get a read of your blood alcohol concentration with the Sensiv Breathalyzer. Simply blow into the mouthpiece for 5 seconds and results appear clearly on the easy-to-read, backlit LCD display. The mouthpiece folds compactly, and your Sensiv Breathalyzer includes 10 replacement mouthpieces. Store the Breathalyzer, charging cable and mouthpieces in the compact carry case. Folding mouthpiece stores compactly Includes compact carry case, charging cable, and 10 replacement mouthpieces Easy-to-read backlit LCD display Rechargeable