When connected to a compatible wet/dry vacuum cleaner, it can be used to clean inside. The suction hose for extracting wastewater is attached directly to the housing of the hard-surface cleaner, making the toughest cleaning challenges a breeze! Comes standard with an ergonomic handle, allowing it to be used for cleaning walls comfortably and safely. Has a robust and powerful technology and standardized connections and adapters that enable them to be easily connected with Karcher HD/HDS high-pressure cleaners and with HD guns.