Karcher’s walk-behind scrubber-dryer B 40 W Bp includes a brush head with disc technology and a working width of 51 centimeters, a maintenance-free battery with 24 volts and 115 ampere hours as well as a stepless drive with forward and reverse rotation. Also included is the innovative KIK key system, which effectively prevents incorrect operation, the time-saving auto-fill function for convenient, automatic filling of the fresh water tank and DOSE detergent dosing system for exact dosing of a preset amount of detergent into the 40 liter fresh water tank.