GSI Bluetooth Stereo Headset Waterproof with Back-hang Style . Embedded microphone for hands-free conversation from Bluetooth-enabled mobile phones. Pause the music & Play back automatically when receives an incoming call. Support remote control of play/pause, previous/next track, volume up and volume down. Call transfer between the headset and Bluetooth mobile phone.Special charge pin Automatically connect to the last connected Bluetooth device.Talk time: Up to 8 hours.Music playing time: Up to 8 hours