Adjustable Blow Time Setting,Low Power Requirement,Optimal Breath Capture,Advanced Features,Flow Error Indicator,Recalls Previous 10 Tests,Carry Case,Numerical Display,Accurate Portable Breathalyser,Auto Power Off,Affordable BACtrack Breathalyzer,Xtend® Fuel Cell Sensor Technology,One Touch Operation,LCD Screen,DOT/NHTSA Compliant,Extra Mouthpieces,Warranty