Stream Your Music Wirelessly with Bluetooth® Wireless Technology. Music data from a compatible device is sent to the main unit by wireless transmission. So you can enjoy the music from smartphone or system in high quality sound. Listen to the mountain of music on your USB stick without needing a CD. Realizes high quality sound, efficient power consumption and compact main unit. The XBS Master high-quality sound technology for even more powerful sound. XBS Master is filled with high-quality sound technologies, including XBS, which amplifies low-frequency sounds; Multi Band Gain Control, whi generated in the process of automatically controlling distortion; and H.BASS, which adds harmonics to enable the reproduction of bass sounds of 80 Hz or less, which were previously difficult to reprod CD Micro Systems are produced with the utmost environmental consideration.