I live in a house about 100 feet from my daughter's house. There is a 24'W
X 45' L X 16' H metal workshop between the two houses. I would like to get a
wireless intercom system that would permit communication among all three
buildings. I have a three-handset Panasonic phone with an intercom but it
will not work across the metal building. It not feasible to run wiring
between the buildings. Any suggestions for a wireless unit would be
appreciated.