Bluetooth not only is good for headsets. But you also can do the following as long as you have another Bluetooth antenna attached to it.
Other Bluetooth uses:
1- transfer pictures from phone to phone
2- transfer pictures and files from phone to pc
3- print pictures from phone to any printer with a USB front connector
4- print from laptop to printer without any cables or wifi
Here are some useful links if you bought a Bluetooth device and don't have the software.
Links:
Link 1
Link 2
Link 3
Link 4