2in1 Bluetooth 5.3 Transmitter Receiver Car Wireless Audio Adapter USB 3.5mm Aux. Bluetooth 5.1 Receiver Wireless 3.5mm Jack AUX to 2 RCA Audio Stereo Adapter. Receiving / transmitting mode, one key switch Bluetooth receiving / transmitting dual-use one, mode switch at will, applicable to a variety of devices.
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