The high-end speaker unit S10 has an integrated Bluetooth module and delivers a clear and detailed sound. The specially manufactured diaphragm is made of bio-cellulose, which is stiffer, lighter and stronger than conventional PET diaphragms. Each of these features results in a more precise and detailed sound, including better defined treble, a more pronounced midrange, better dynamics and a more natural overall tonality. Improvements have also been made in low distortion and level stability, so the clarity of the sound is maintained even at high volumes. The speaker unit enclosure is molded from durable ABS material with 30% recycled content and coated with rubber for a matte look. Operation has been greatly simplified by using a miniature joystick.