The SharkPOWERDETECT upright vacuum has the most powerful suction and the most advanced cleaning technology to deliver the best overall cleaning of any vacuum. It features Shark’s most advanced cleaning technologies in the new DuoClean Detect nozzle which includes a network of proprietary Intelli-Sense sensors that automatically sense and react to hidden dirt by boosting suction and brushroll speed when you need it most across floor type corners edges and it even detects direction for powerful suction in forward and reverse to grip- capture- dirt debris hair. Large piles fine dust and pet hair are no match for DuoClean Detect. For above-floor cleaning you can Lift Away the detachable pod and take your cleaning to stairs furniture windowsills and more. In addition when you lift away the pod you transform your vacuum into a stick for easy motorized cleaning under furniture. Shark’s Odor Neutralizer Technology guards against bad odors inside your vacuum to help freshen your home. Plus Anti-Allergen Complete Seal with HEPA filtration seals and traps 99.99 of dust dander and allergens inside of the vacuum and out of the air you breathe. Based on a geomean of ASTM F608 ASTM F2607 and IEC62885-2 (5.3) (FWD/REV) (5.5) (FWD/REV). Based on ASTM F1977 down to .3 microns. Allergens refers to non-living matters.