The Sandberg BT Audio Link 2in1 TxRx lets you wirelessly transmit and receive audio signals via Bluetooth. In transmit mode (Tx), you can connect the audio signal from a headphone output on your TV to your Bluetooth headset, for example. In receive mode (Rx), you can wirelessly stream music by connecting a Bluetooth device (such as a smartphone) to the AUX input of your radio, stereo or car audio system.