In-Helmet Speakers with 3.5mm Plug enhance your sporting activities with music. Listen to your favorite tunes through the Rugged Radios helmet speaker kit. Both Clear Hear Speakers and powerful Alpha Audio options are available with a standard 3.5mm jack. Low profile speakers fit comfortably in helmets and can provide a soundtrack to activities like dirt biking or street biking. Features include slim line speakers, easy install velcro mounting, an industry standard 3.5mm jack, a tough polyurethane cable, and high-quality audio.