[dawidpacha]

@sahaskatta

This is one of the available solutions. However, you need to have a jack port. I read Apple is dropping one tomorrow.

Also in this case you need to have two Bluetooth headsets. Velo could support Bluetooth headsets, but traditional headphones seemed an easier choice.

BTW Monoprice works with up to 2 headsets. We think that we could connect more than two headsets with Velo.

[PieterH]

Using traditional headsets is a great idea.

You should also IMO look into a software-only solution, i.e. a music player that streams its output to other smartphones via bluetooth or wifi. Because if your idea takes off, this is IMO what will kill a hardware product.

And you might eventually talk to accessory makers to build such capability into cases.