Humidity outlet switch turns any piece of equipment on or off. Program higher-ON/lower-OFF or lower-ON/higher-OFF switching at any set point from 30 to 90% RH in 1% RH increments. Use for turning humidifiers, dehumidifiers, or alarms on or off. Three-button operation is extremely easy and fast. A manual override permits equipment to be switched on or off instantly without disturbing the program. Rechargeable nicad battery maintains operation for days in the event of an electrical outage.