Speakers and microphones are already fitted to every M1 by Schuberth. The microphone is designed to fit the helmet in such a way that the rider can neither see nor feel it. The SRC-System™ for the M1 only needs to be clipped into the recess provided for it. Pop in the SRC and that's it, right away you can instantly use navigation, music, telephone and Bike-to-Bike conversation. The perfect complement also for your M1.