Please Note:AS the USB and
Bluetooth are connected through the same signal Channel,so if you want
to connect with the bluetooth,firstly please pull out the usb,restart
the bluetooth function and the machine,then connect.The USB supports
only 5 formats:MP3/FLAC/WAV/APE/WMA,and the Bit Rate should not be
higher than 16BIT/48KHz.Otherwise,there maybe noise.