Control dial and ergonomics: the dial allows you to easily control the volume and with an easy-to-use push button you have access to all the functions of the device. The Sena headset comes with Bluetooth 3.0 as standard. This allows the driver to conduct mobile phone conversations without cables, listen to stereo music from their MP3 player or navigation voice prompts. Universal Intercom(TM) is a unique industry standard with its ability to conduct conference calls, providing users with interfunctionality across all brands. With the feature of shared music you can listen to music together via two pairs of Sena intercoms via both devices. The same unique functions are available for the control. Advanced Noise Control(TM): It is equipped with wind noise reduction and intelligent noise gate in the intercom to suppress wind noise interference and background noise while driving.