Exoterra Thermostat & Hygrostat 600W 100W Ferret Food 5 x 12 in) 100062882 5 x 12 in) ZenCollar is a preferred choice for veterinarians and pet owners looking for alternative recovery collars The Dimming function keeps the temperature at the desired set point with a much higher accuracy than conventional thermostats and virtually eliminates temperature swings in the terrarium With the Exo Terra Thermostat & Hygrostat with Day Night timer you can create a well controlled heating humidifying system that allows you to maintain the required temperature and humidity conditions similar to those found in desert and tropical environments