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.