I need to talk to multiple channels simultaneously

Hello everyone. I know nothing about two way radios or anything similar. I own an escape room and in our next room we’re planning we want each player to wear an earpiece that we can communicate to them through. They don’t need to be able to communicate back. Sometimes we want to send messages to the whole group and sometimes we want to send messages to an individual. Is this possible?

Yes it is. Multiple radios, one each freq/channel, selectively switch audio from all to each individual.

You could also use selective calling to individually address individual radios. It would allow you to use a single RF channel and still perform group wide calling.