Audio Receiver Adapter5.2 Bluetooth-Compatible AUX /OpticalFiber /Coaxial USB Wireless Audio Adapter 16 Bit for Audio/Amplifier. Connecting To Old-Fashioned Speakers Or Amplifiers: Stereo audio component receivers can solve the problem of speakers without Bluetooth-Compatible and cannot be played using Bluetooth-Compatible through the AUX/RCA interface or fiber coaxial interface of old-fashioned speakers or amplifiers.
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