♪ daddy, mommy's on the phone! hi! how are you guys? ♪ with large debris and stuck-on dust, so shark invented duoclean, replacing the front wall with a rotating soft brush. while deep cleaning carpets, two brush rolls pick up large particles with ease, make quick work of stuck-on dust, giving hard floors a polished look, and fearlessly devour piles. shark duoclean technology, designed to do more on carpets and floors, available in corded and cord-free vacuums, and only available from shark.