Stilo earplug type headset adaptor cable for headsets with a 3.5mm male jack plug. All Stilo racing helmets come with a military specification locking socket for the earplug connection and are wired directly into the electronics system within the helmet. This adaptor enables the use of professional ear plug type intercom headsets that use a 3.5mm jack plug.
This conversion socket is used with all ST4 and ST5 race helmets and allows connection to earplugs with a 3.5mm jack to the Stilo helmet.
Alternatively you may want to look at the Stilo Ear Plug kit (available as an extra) which comes complete with the relevant male connector to allow easy Stilo connection.