[f_allwein]

Also, who carries a Bluetooth speaker on a plane? And for what purpose?

[al_borland]

Most BT speakers have a battery, which means it has to be in carry-on luggage. Why it would be powered on is the question, but this could have happened inadvertently by getting knocked around in a bag.

[simulator5g]

Sometimes I see my BT speaker broadcasting BLE info when it is turned off. Most things do not really 'turn off' these days.

[lxgr]

Which is actually really useful, in this case – this lets me turn it on from across the room from my phone without having to get up!

[simulator5g]

I also love that feature on your bluetooth speaker because I can turn it on from inside your walls.

[andix]

I do, because I want to listen to music when I travel. Not in the plane, but at my destination.

[prmoustache]

If you want it at your destination you are kind of forced to as you can't transport batteries in your checked luggage.

[Geof25]

Speaker in carry on luggage to be used in vacation. They were flying to Malaga

[grodriguez100]

Not Malaga according to the article — destination was Palma de Mallorca.

[blitzar]

"bare beating"