General electric wireless outdoor outlet transmitter and receiver. I have three of them. One for the tractor, one for the Jeep and a spare. I can see both the tractor AND the Jeep from the nice warm house. I have a short set of L.E.D. Christmas lights T'd off the receiver of both. The opposite side of the T goes to the block heater. When I finish with either the Jeep or the tractor after I shut them down I plug them in. No juice goes to them until I light up the lights. 2 separate transmitters, 2 separate receivers.
PT-448B
Maximum Resistive Load 1440Watts
Maximum Tungsten load 1000Watts
i got them at **** depot a few years ago