The HFK 300 uses Bluetooth data transfer technology to allow for hands-free mobile phone use in the car. The driver simply needs to connect the Bluetooth kit to the car radio and can immediately start talking using the Bluetooth-equipped mobile phone. The Delphi hands free kit does not need any cable of phone holder and provides additional features such as automatic radio muting for incoming calls, audio output through the car speakers and voice recognition for stored numbers make phoning while driving safe and easy! The Delphi HFK300 hands free kit does not require any software update. The HFK300 supports Bluetooth 2.0 Norm and is compatible with all mobile phone integrating HPP profile.