I have a relay on my Cyclone, I have a DC low volt set of switches wired to it, a switch at each tool, open the blast gate for the tool and there is a switch right there, I reach over and turn it on. As the wires just run along with the ducting, it was really easy to set up. I have a variety of scavenged switches, and I bought the relay unit used on auction really, really cheap, the wire is old telephone wire, and the DC voltage comes from one of a box of AC/DC adapters I have from various pieces of electronics equipment that is no long with us My system works on a time delay, I wait a moment after switching the tool off to switch the cyclone off
I bet I spent less than $30 on my set up, and it works great!
Nothing wrong with wireless but I don't think EVERYTHING has to be wireless
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
William Arthur Ward