The B 90 R as successor of the BR / BD Trike has an enlarged tank volume, a high manoeuverability and a small turning radius of 1,6 m. Due to its compact design the machine can be transported easily. It can be transported in elevators. The B 90 R is equipped with ventilation openings for the battery case. Different disc and roller brush heads of Kärcher´s new brush head generation can be used in different working widths (55-75 cm). The brush drive operates with star coupling. An easy fresh water filling can be guaranteed. The turbine is protected with an additional washable flat pleated filter against corrosion. Continuous additional metering from the storage tank for cleaning agents. Adaptation of the metering to the degree of soiling during the cleaning. Exact dosage between 0,5 and 3 % (in 0,5 % steps).