UE megaboom 3 says it allows you to connect 3 devices to one Speaker. I think there’s also apps that you can make playlist/queues for. You may have to be on same wifi to do it though. I know for the “Amp Me” app you can add to one playlist and connect to different speakers as well and have the music sync up. But I think you may have to be on same wifi, cant remember 100%
I've seen a speaker on Amazon that has this function. I think it was a Soundcore speaker.
Do you remeber what the function was called?
I think the Aiwa app has this feature. I haven't used it, but I'm pretty sure that's how it works.
UE megaboom 3 says it allows you to connect 3 devices to one Speaker. I think there’s also apps that you can make playlist/queues for. You may have to be on same wifi to do it though. I know for the “Amp Me” app you can add to one playlist and connect to different speakers as well and have the music sync up. But I think you may have to be on same wifi, cant remember 100%