Dyson Reveals Microscopic Dust - The most powerful and intelligent cordless vacuum cleaner. MEASURES MICROCOPIC DUST PARTICLES - A piezoelectric sensor continuously measures and counts dust particles, automatically increasing suction power when needed. Root Cyclon Technology - 14 displaced cyclones generate forces up to 100g to capture dust and debris from the airflow, so there is no loss of suction. Multi-Stage Filtration - Dyson fully sealed filtration traps 99.99% of microscopic particles and allergens as small as 0.3 microns and expels cleaner air. AUTOMATIC CLEANS CARPETS - In automatic mode, Dyson DLS technology inside the High Torque cleaner head monitors the resistance of the brush bar 360 times per second, intelligently adapting power to different floor types.