Skirmishd wrote:

My husband had a garage put up in the backyard, and that is his
woodshop. It would be nice if I could call him. We tried to set up
an intercom but that didn't work with the old wiring in this house.
I have considered walkie-talkies, but hear that you have to get some
sort of FCC license for them.

Leave him alone. He needs his time alone. If it's urgent, you can walk out
there.

You'll both be better for it.