Adjustable fan thermostat with relay. This is an all in one control unit for any electric fan. The unit comes preset at 160 degrees with a screw to adjust the temperature. The setup includes a relay, directions, and a fuse. The temperature probe goes into the fins of a radiator or heat exchanger. The control unit can be used with single or dual electric fans. The unit operates off of the A/C clutch for continuous fan operation.