With the Karcher Floor Cleaner you do not have to vacuum floors any more prior to mopping. These floor cleaners do so at the same time. There are 2 rotating microfibre rollers in the squeegee that absorb both dry and wet dirt. The self-cleaning function continuously removes the dirty water from the rollers. This way you can clean quickly and efficiently. You use the electric mop on all hard floors, including stones or wooden surfaces. Afterwards you place the floor cleaner in the cleaning station for intensive cleaning of the rollers. With the Premium model you get an extra set of rollers and a bottle of cleaning agent.