DuoClean PowerFins: A PowerFin roller and a soft roller combine on all floors. Continuous cleaning contact to dig deep into carpets, directly engage floors, and pick up more in every pass. (vs. original DuoClean) Self-cleaning brushroll for powerful pet hair pickup with no hair wrap. Engineered to pick up more hair with no hair wrap (vs. shark bristle nozzles) Lift-Away the detachable pod with the easy-to-use pod-release pedal to clean stairs, furniture, and everywhere in your home. Anti-Allergen Complete Seal Technology and a HEPA filter trap 99.9% of dust and allergens inside the vacuum cleaner. (Based on ASTM F1977 of particles .3 microns or larger.) A lighter pod than Shark's best-selling Lift-Away, with more suction for versatile whole-home cleaning. (weight and suction vs. NV351, suction measured at the hose.) Powerful LED headlights on the nozzle reveal hidden debris around your home.