The Exo Terra incubator uses thermo-electric technology to heat & to cool which means that this incubator can be used to keep incubating eggs warm or hibernating creatures cool. There is a digital control to regulate a temperature between 2°C & 60°C in the incubator. The incubator has a transparent door & lighting inside so that you can watch the incubation process. When the temperature inside the incubator rises about the selected heat it automatically starts to cool. When the temperature drops below the selected heat it automatically starts to heat. This helps to prevent loss of eggs. There is a removable tray in the base of the incubator which can be filled with water to ensure the correct humidity. You can also place the water-filled tray inside the incubator. The Hagen Exo Terra EX Incubator at a glance Precise combination of cooling / heating Prevents loss of incubating eggs Ideal for hibernating small tortoises & turtles Digital temperature regulator for precise heating between 2 °C & 60 °C 2 removable racks Removable condensation traz With handles & adapter for use in the car