Yes, this works with at least 2x sources - I've tried it. You can only hear one source. To switch, you have to pause or stop one source. Then it automatically switches to the 2nd source if something is being played in the 2nd source.

It's called Multipoint-Connect.

Have fun with the headphones.
Roland

Yes, this works without any problems (2 devices max.) - recommend the Senheiser app to easily switch between different devices.