When draining the mop, moving the bucket, etc.
It avoids pains in the spinal column and wrist.
It doesn't cause annoyances in arms.
It doesn't hurt your hands, avoids hardness and callositys.

Perfects the cleaning and saves time.

Handy and simple.
Low volume, for the stairs, to keep it on, etc.
Big autonomy: it doesn't need cable, the battery is charged in a
standard socket, it moves over wheels.
Low consume.