With this app you can use the car bluetooth for audio streaming. Test your Bluetooth to see if compatible and try the app for 5 minutes. Turn on Bluetooth if it is OFF and connect it to the receiver. Then press Start to begin streaming. The sound quality is that of the telephone audio channel. In addition, the app will read your incoming text messages and you can hear through the car stereo. If the app you like you can buy the full version "4Bluetooth Streaming".