BACTrack Select S80 Breathalyzer BACtrack’s premier professional breathalyzer, the S80 is an ideal choice for law enforcement, health professionals or anyone who requires the most dependable BAC results. It features pro-grade Xtend® Fuel Cell Sensor Technology with enhanced linear accuracy, and convenient one-button operation for fast and accurate BAC results. Simply press the power button and begin testing in just seconds; has (5) mouth pieces unopened. Used once.