Turn your mobile phone into an FM radio with this unique headset. Plug the headset directly into your phone and tune into your favorite radio station. Utilize the answer/end button for remote operation. When a call comes in the radio will automatically mute to allow you to answer the call. When you hang up the music resumes. Compatible with 5100, 6100, 6610, 7210, 3155i, 6235i, 6670, 6155i, 6282, 6265i, 6682, 6822, 6133.