Sandberg Bluetooth Audio Link 2 in 1 TxRx enables you to send and receive a sound signal wirelessly via Bluetooth. Configured as a sender (Tx) you can get the sound signal from a headset output in for instance your TV connected to your Bluetooth headset. Configured as a receiver (Rx) you can connect a Bluetooth device like a mobile phone through the AUX port on for instance your car stereo to enjoy wireless music from your mobile through the sound system of the car.