A radio method for doors in the 2.4 GHz frequency band with operating channels, wherein a stationary unit is bidirectionally networked by means of a wireless radio connection with at least one battery-powered mobile unit and uses a frequency-hopping method, wherein channel hops are executed in a time raster between 0.625 ms and 10 ms, the channels used for the frequency-hopping method are adaptively selected, at least one complete communication cycle takes place on one channel within the time raster, the number of transmitted data is adapted to the useful data that must be transmitted, the synchronization for establishment of a connection between the stationary unit and the mobile unit takes place on a synchronization channel.