40W, Egg Incubator, Easily Accommodates Up To 4 Dozen Eggs, Built In Hygrometer Measures Both Internal Temperature & Relative Humidity, Solid State Circuitry For Long Lasting & Reliable Temperature Setting, Red Indicator Light Shows When Heater Is Operating, Large Viewing Windows For Observation, Additional Probe Thermometer Included, Made With Recycled & Insulating Polystyrene.