Plug your appliance into the cold weather Thermo Cube and plug it into the wall. When the temperature drops below 20 the Thermo Cube will turn your appliance ON. When the temperature raises up past 30 it will turn your appliance OFF. Each unit has two receptacles for use with more than one device. Can operate loads up to 1800 Watts, 15 Amps, 120VAC. Also available in a 35 ON/45 OFF version. Use this Thermo Cube to automate self-regulating heat tape, heat lamps, stock tank heaters, pond de-icers, engine-block heaters. If it gets too cold in the attic because the pilot light blew out when gas service was interrupted, you can have it turn on a space heater. You can even use the Thermo Cube with a strobe light to create a "Freeze Warning" system that can be seen by neighboring homes or buildings. We also offer versions for hot weather applications: 78 ON - 70 OFF - #7144 120 ON - 100 OFF - #7145 Recommended for use with GFCI outlets.