The Exo Terra Precision Incubator PRO makes incubating reptile eggs safer and uncomplicated. The Incubator features dimming/pulse proportional thermostat accurately keeps the set temperature, while the hygrostat regulates the relative humidity through the USB humidifier. The unit includes one USB humidifier and is ideal for use with the Exo Terra Incubation Box - Makes incubating reptile eggs safer and uncomplicated - Includes one USB humidifier - Ideal for use with Exo Terra Incubation box