Wireless headphones for a group of people?

Question

Bluetooth

Recommend headphones that can be used together. For example, from three pairs with a single sound for all. However, they can also be used independently. It would be cool if there is still a special transmitter for them, inserted into a standard 3.5 connector and transmitting sound (this is probably my dream).
Of the wireless ears, I only had a headset for smart. I can imagine how everything works only in theory (can any ears be massively connected to a bluetooth sound source?).
Thanks for all the advice and comments.

Answer 1

Perhaps, as an option, a splitter for 3.5 jacks (or several) + several bases, for example, Sennheiser RS ​​160 (they have a cable for the jack) and up to 4 pairs of wireless headphones for each base.

Answer 2

Push off www.amazon.com/Belkin-RockStar-Headphone-Discontin...

Answer 3

see equipment for press conferences. videoconferencing, etc.