Intercom suggestions/experiences

[cb360]

Hi there. I'm just getting back on a bike after a long time off. I'm taking it slow - I found a near mint '74 Honda CB360 and my wife and I will be slowly cruising the back roads of Western Washington. It would be nice if we could talk to each other while we were doing it. I'd love to hear suggestions on the best way to accomplish that goal. As you probably know our bike is not very high-tech so there's no on board radio or anything. Something simple would probably be best. Thanks in advance.