I have an out building with a 300 watt light high up at the entrance. The wall switch is just inside the walkthrough door going into the out building. I want to be able to turn that light on from inside my house so I can walk out there in the dark without tripping over a forgotten shovel or one of the feral cats that hang out out there. My jointer is out there and I do work on the entrance concrete pad that is too dirty to do in the garage shop. I know I can buy an RF controlled wall switch but the range is short and they seem to come only in Decora style.
My ideal would be to leave the current wall toggle switch and use an RF switch that I already have with one fob, like this one. I guess what I want is a three way switch with the second switch being my RF switch. I realize I could get a second fob and use that in the out building but I would like to keep the wall toggle as is and use the fob only from the house.
So how do I wire this so either the wall toggle or the fob will turn the light on and off? Do I add a contactor or what?