A mixer cartridge contains a plate-type control system, the control plate of which is displaceable and twistable by an actuating element configured as a double-armed lever. The structured surface includes a linear array of miniature substantially right angled isosceles prisms arranged side-by-side to form a plurality of peaks and grooves. To this end, a valve arrangement at the intake end is provided for controlling the fresh gas stream through the gas paths into the respective combustion chamber. The ability to combine two of these communication modes in a small, integrated and hence inexpensive and low-power package provides many advantages over existing personal communication device solutions. A set of clubs thus made increases playability by providing a range of club weights in the set. The outer insulating film is provided between the memory layer and the electrode films.