I’m starting a running program with my family. Part of the fun is building a shared playlist and listing to cues together. I’d like to run the audio off one phone and have it go simultaneously to 4 headsets. I see there’s phone apps that do today but my kids don’t have phones. Is there a hardware device that can do this?
Also, if you have a headphone jack, you could use a 4-way headphone jack splitter and 4 of those little car audio bluetooth adapters. A little hacky, but it wouldn’t break the bank.