Hova-Bator is the Worlds Best Small Incubator and is the most economical, reliable incubator available. The radiant heat tube gently warms the inside of the incubator. The built in thermostat keeps the temperature steady. "THERMAL" Incubator Heated air flowing out the exhaust vents in the top of the incubator, draws fresh air in through the bottom vent. Ideal for almost all reptiles!