Challenger Semi-Custom Molded Ear Bud Speakers with 1/8in Plug are suitable for racing helmets, available in both mono and stereo. Designed after custom molds, they fit a range of ear sizes and offer superb audio quality alongside blocking environmental sounds. The Ear Bud Speakers come with Knowles Hearing Aid Speakers, rugged-duty cabling, a 1/8in mono or stereo audio plug, and 18 inches of cable length. They're made in the USA and, due to health laws, cannot be returned.