Riders that have never seen the benefits that a feature-laden Bluetooth system can offer firsthand will be awestruck once they find out what SENA Bluetooth products can do. Simply put, Bluetooth is a technology that was created to make the user's life easier. Riders, especially, have found Bluetooth to be immensely helpful. It's nearly impossible to use a cell phone with a helmet on. A Bluetooth system, however, eliminates the majority of road noise that goes into the mobile phone's microphone, allows you to hear phone calls with greater clarity, and makes what you say more audible.The SENA Bluetooth products we offer are designed with a number of applications in mind. If you often ride with other people, a Bluetooth-based intercom system will be an excellent communication solution for you. With your helmet safely secured to your head, you'll be able to chat seamlessly through your Bluetooth intercom. You can use up to four intercoms with this setup. All SENA products are designed to go inside the helmet, without any parts protruding uncomfortably into your head or blowing in the wind. A Bluetooth system can also be used to listen to music through headphones.