• Customer J. Meiburg says: "i put these in my helmet and rode 1600 miles on a 1700cc cruiser with Vance and Hines pipes and could listen to my MP3 player without a problem.. these speakers are awesome! "
• Stereo Earphones for Helmets (3.5mm jack, 4ft long cable). For motorbikers, skiers, snowboarders, sky-divers, etc
• Firmly fixed to inside of helmet via Velcro
• Great stereo sound quality
• Can attach to iPods/iPhones/iPads/MP3/Bluetooth receivers with 3.5mm audio jack 

Motorcycle/ski/snowboard/sky-diving/extreme-sports helmet earphones. Created to provide quality sound and music, while you bike and/or enjoy your sporting activity.

Specifications:

    50mm diameter speakers velcro, attach easily and securely to inside of helmets
    120db
    3.5mm gold plug/jack, compatible with 3.5mm audio devices
    Frequency response: 20 ~ 20KHz
    4 ft cable length (BLACK color cable)

Does not include helmet, audio player/phone, bluetooth receiver device