You can easily upgrade your helmet setup with this Bluetooth® system by Sena. It delivers audiophile-worthy performance for your tunes and conversations in a stealthy setup that fits within the interior recesses of your helmet. Installs easily, to communicate with your passenger for up to 12-hours on a single charge. Riding in a group? Sync with one to four riders with an up to one mile range. The result is a helmet that offers all the protection you need with amazing looks and comfort without the wires, hassle, or bulk of traditional external mounted communicators. Bluetooth® is a registered trademark of Bluetooth Sig, Inc.