A lever-type connector has a housing and a linking wall projects from the housing to define a stop for a mating housing. Electrons originating from a controlled electron emission device are introduced into the Faraday cage, the electrons reaching the electrode with which it is in contact in order to charge the structure. The channel allocation unit allocates a communication channel to the communication terminal communicating with the base station via the relay device. Then rubber bands may be used to secure the stems to the anchor, and the assembly may be placed into a vase. A step is carried by the pair of arms.