Bluesonic is a bluetooth motorcycle communication system, it is integrated in Schuberth helmets and can be built in to the following modells: R1 S1 Pro C3 C2 and J1.

It can be configured in the following way:

One slave helmet can be connected to the master helmet for Intercom function
One mobilephone can be connected to the master-helmet for calling or answering calls.
One Motostation can be connected to the master- and slave-helmet to extend the system, to the Motostation you can connect one GPS, one Audio stereo source, one PMR radio (for bike to bike comm).

Link to Shuberth information in German.

BMW R1200GSA -08, Schuberth R1 with Bluesonic, Garmin Zumo 660 not working with Bluesonic Sad