Sandberg Bluetooth Audio Adapter Link 2in1 TxRx allows wireless audio sending and receiving via Bluetooth technology. Once configured as a transmitter (Tx), you can send an audio signal from the output of the headset to e.g. a TV connected to the Bluetooth headset. Once configured as a receiver (Rx), it can be used to connect a Bluetooth device, e.g. a mobile phone, via the AUX socket to an audio system in the car, for example, to listen to music transmitted wirelessly from the phone.