Is Bluetooth open to public?

[Bdaly]

Thanks Ragwo, found it. I live in a block of 6 flats and didn't want the same thing happening to me. Especially as it defaults the volume to 70.
Strange thing is the Remote control still works, i thought this was Bluetooth.

My default volume is 35 and when it happened it was max volume straight away, lucky I was home, imagine what would of happen if I was not home.