Tandem Air Technology A Clean Air Motor for strong suction backed up by a Direct Air Motor for intense airflow. Combined, they make the perfect vacuum, high air flow and deep suction to clean your floors fast!Full Bag & Filter Indicators No more guessing when a bag is full or a filter needs to be changed. Indicators on the head notify you that its time for a changeHall Sensor & Lifetime Belt Protection Breaking a belt is a thing of the past with Hall sensor technology. When it senses a jammed condition, the brushroll stops until the jam is cleared. Then it's back to vacuuming like nothing ever happenedMetal Brushroll A strong metal roller is designed to perform well and to last for many years. As you'd expect, brush strips are replaceable and are customizable to your home's floors