Corded option for MP3 players, etc. Extra audio enhancement with Zirene power bass. Remote control your music via touch sensor. Noise blackout with dual microphones. Crystal and clear sound and voice (DSP). Can connect two devices at the sametime. Up to 8 hours talki time/music time, and up to 10 hours standby time. Cute the wires and make your favorite music sound even better with the wireless headset. Connect easily to your mobile phone and enables you to stream music wirelessly. You can even make and take calls wirelessly, if your player of choice does not have Bluetooth technology/A2DP use the corded option.