The SENA 20S, 20S Evo, 30K Universal Helmet Clamp Kit is a spare helmet clamp and boom mic provides clear communication through your SENA 20S, 20S Evo, 30K Intercom.Provides clear communication through your SENA 20S, 20S Evo, 30K IntercomAllows riders to keep in contact with other riders within your groupSimply make voice commands to your GPS systemDesigned to fit, mould and adapt to any helmet shapePositioned so that there is no discomfort experienced by the userThe SENA 20S, 20S Evo, 30K Universal Helmet Clamp Kit allows riders to keep in contact with other riders within your group that are paired to you or simply make those voice commands to your GPS system while out exploring the open roads on your next adventure.The Helmet Clamp Kit has been designed to fit, mould and adapt to any helmet shape as well as be positioned so that there is no discomfort experienced by the user.