Rugged, moisture resistant, durable greenhouse thermostat with wall plug power supply and 120 V input receptacle that make it a cinch to control a fan or heater in your greenhouse environment. This thermostat has easy to read dials, incremented by degrees, with a temperature setting range from 50 to 100 and is encased in a corrosive resistant plastic box. Just plug the unit into a 120V AC receptacle, select heating or cooling mode, adjust temperature knobs to the level that you want to maintain and plug in your devise.