The first is automatic dirt detecting thanks to the DuoClean Detect nozzle ... In comparison to other stick vacuums on the market, this Shark model offers better suction, more fun, high-tech ...
Sharkvacuums that feature DuoClean have two brushrolls within the floorhead. On older models, it's just called 'DuoClean', and the floorhead has a soft brushroll to clean and polish hard ...