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In bluetooth speaker mode, the phone bluetooth connects to the x1 pro, and through the docking station as the data hub, the 4 speakers receive the signal as sound, and will simulate the songs cast over the phone bluetooth into surround sound. In Bluetooth speaker mode, it also supports 7.1.4 and 5.1.2 and 2.1

If you have any other questions, please don't hesitate to contact Nebula Customer Support at service@soundcore.com  for further assistance.