High Quality Bluetooth 2.1+EDR Headphones Headphones can communicate with two devices simultaniously (e.g. MP3 Player & Smartphone) Built-in microphone allows you to make phone calls and talk trough internet chat software (eg. Skype, ICQ etc.) High capacity battery allows you to run a long phone calls or listen to your favotite music. Perfect for long journeys, at work and in everyday use.