Use to power 120 VAC Compact Cooling Fans; replaces existing supplied power cord. Fan cord includes inline thermostat. The cord automatically activates up to two fans. Fan(s) will turn on when the inline thermostat reaches 86°F (30°C). Fan(s) will run only when temperature is above 86°F (30°C). Use with 110-120 VAC fans with power cords only. One or two fans can be used with power cord.