Karcher B 40 W DOSE Roller Brush is a walk-behind, scrubber dryer, featuring a 40l fresh water tank, ideal for medium-sized floors. The brush contact pressure can be adjusted as well as choosing between a roller or disc brush option with various working widths. The KIK key system provides protection against incorrect operation. Extra feature on the Karcher B 40 W DOSE Roller Brush : eco! efficiency mode extends battery life, tank rinsing system for automatic cleaning of the dirty water tank without splashback, auto-fill function for convenient filling of the water tank as well as Dose cleaning agent dosing system for direct dosing from the cleaning agent container. This is a configuration example. This machine is available with a range of different equipment and features, e.g. different batteries and Dose cleaning agent dosing system.