Do you know a gadget capable of combining all audio devices into 1 system?

Question

Audio

Hello!
In general, such a question would be desirable to simultaneously connect several audio sources to 1 audio system (speakers), namely a PC, Laptop, Phone, with a convenient ability to switch between channels, who implements this issue, most importantly without wires.
There is an option through bluetouch, but somehow it does not appeal to the ability to constantly reconfigure communication channels =(
+ It is necessary that bluetouch headphones cling to the device.

Answer 1

Multiroom (for example, switches from the Israeli company Kramer).