System including at least one master unit and a plurality of slave units, wherein the at least one master unit includes means for transmitting control signals to the slave units via radio frequency channels. The slave units are provided with unique addresses and are each associated with a controllable device. The at least one master unit includes means for configuring the slave units that are addressable by the master unit in a number of sectors. The master unit is further designed in such a manner that when a slave unit is allocated to a sector, one or more further slave units may automatically be allocated to the same sector in dependence on properties related to the slave units.