The FOX 301 humidity & temperature controller allows climate control of a living space, food storage space, greenhouse or terrarium in the simplest possible way, using just one device. Two temperature relays & two humidity relays are available. Typical application in the terrarium: Temperature relay 1 controls a heating filament, temperature relay 2 controls a fan & a shade. Humidity relay 1 controls an air humidifier or a solenoid valve, humidity relay 2 also controls the fan. The device is set up for using the DS4000 & NTC sensors.