A high-end speaker with a built-in mp3-player, that dances on the rhythm of the music. Sony calls it the Sony Rolly. This Sony Rolly is the latest example of Sony's expertise in entertainment and technology. Despite its small size and light weight, the Rolly device produces surprisingly clear sound. To achieve a powerful audio performance the speakers have a neodymium magnet. To choreograph an original routine, the unit comes with software for customizing the music and motions on the device using a USB connection to a PC.