Level 3 root cyclone. The worlds most efficient cyclone technology. Constant suction: Only Dyson vacuum cleaners have constant suction room after room. Best pick-up: Unique cleaner head and motorized brushbar for the best pick-up across all floors. Clean exhaust air: Air expelled from a Dyson has up to 150 times less bacteria and mold than the air you breathe. Quick draw telescope reach: Extends instantly for stair and high reach cleaning.