The SA505 enables you to manage both your phone calls and music reproduced by a mobile phone, MP3 player, PC or any other Bluetooth-enabled device. When calls are received or ended the SA505 provides seamless automatic switching between the music and call. U N I Q U E A D V A N T A G E S Exceptional stereo sound Sliding microphone for better voice quality Push4 Favourite number button Richer sound thanks to high output 50 mm stereo speakers Better sound quality thanks to Bluetooth 2.