They are slightly thicker than that of the intercom and be amended over headphones intercom improve sound / bass, so does sound more like music. Up to 100 km can be heard reasonably what, after that it is more a guess what's going on. What is also abgängig the player, helmet, of course. Unfortunately, pressing slightly on the ear, as it is not a lot of space in my helmet. Nevertheless, I have to date found no better alternative.