HI I'm wondering if anyone knows if there is an earpiece and microphone system that will allow a director to talk to a host in the ear piece, while the host talks to the audience with the mic at the same time. Is there such device, or does there have to be two systems?
Thanks for the help.

Not sure I understand, but
Sound like you need 2 Frequencies, Duplex maybe
Director talks to Host on channel 1, Host talks to audience on channel 2 through amp and
Speakers.
If Directors Mike on same frequency, may be received and amplified through PA.
I will look into and see what I can find.

Yeah you have the basic idea. The host having a device that can allow him to use it as a mic to address the audience and also to hear the director. Thanks for looking into it more.

Ask any televangelist - that is how they purport to knowing details about people, it is fed into their earpiece.

Ok thanks