Once you have converted a Graupner mc-transmitter to the M-LINK system, it is possible to expand the transmitter by a further four channels (equating to eight channels in Graupner language). For example, a twelve-channel mc-24 transmitter becomes a sixteen-channel transmitter. All the available channels are of equal value, proportional, and equally fast (21 ms), although these four auxiliary channels are not programmable (as is the case with MULTIPLEX PROFI mc transmitters). The channel expansion module is plugged into the HFMG module, and the additional controls are connected to it.