While half of Serenata is devoted to music and the other half to the mobile phone, the built-in speaker will deliver outstanding sound quality for both. Advanced audio engineering and top notch speakers only partly explain its remarkable performance. Bang & Olufsens ingenious acoustics are the other reason, featuring two high-quality speaker units which, controlled by advanced digital signal processing, delivers a very precise reproduction of whats being said at the other end of the line or played from your favorite track. Thats in addition to ICEpower amplifiers which enable a surprisingly powerful sound emanating from such a small space.