Dirt Sensor The amber Dirt Sensor light located in the LED headlamp turns off when its time to move onFull Bag Indicator No more guessing when a bag is full. The Full Bag Indicator Light notifies you that its time for a changeHEPA Media Bag Top loading HEPA media bag captures dust and locks in particles down to .3 micronsLifetime Belt Protection Lifetime belt protection stops the brushroll from turning until the jam is cleared, saving you from unexpected belt changes