The Sandberg Bluetooth Audio Link 2in1 TxRx allows you to wirelessly send and receive an audio signal via Bluetooth. When configured as a transmitter (setting 'Tx'), you can connect the audio signal from a headphone output on your TV to your Bluetooth headset. When configured as a receiver (setting 'Rx'), you can connect a Bluetooth device (e.g., a smartphone) to the AUX input of your radio, stereo system, or car radio to wirelessly listen to music from your smartphone through your car's sound system.