Old Sony music car system convert into Bluetooth without USB

car music system convert into Bluetooth, Avoid aux cable, with aux cable only one speaker work often, Replace CD system with Bluetooth module, Permanent work done with Bluetooth module, USB has doubt for spoil and fear about lost, car music system convert into Bluetooth, Avoid aux cable, with aux cable only one speaker work often, Replace CD system with Bluetooth module, Permanent work done with Bluetooth module, USB has doubt for spoil and fear about lost.