Casio Wireless MIDI & Audio Adapter WU-BT10 Black

By attaching it to the CT-S1, you can not only play your favorite songs from your smartphone/tablet on a powerful speaker system, but you can also enjoy playing along with the songs. By attaching it to the CT-S1, you can not only play your favorite songs from your smartphone/tablet on a powerful speaker system, but you can also enjoy playing along with the songs.