Like a mother hen, the Hova-Bator Incubator hovers over the eggs, gently warming them until they hatch. This scientifically designed incubator is made of thermal plastic that holds a constant temperature. Maintains constant humidity. Includes a thermometer, thermostat, two 4" x 5" observation windows, and a plastic sanitary bottom liner. Thermal air flow incubator is 18" L x 18" W x 7-1/2" H. Holds up to 42 chicken eggs. Egg turner not included (sold separately, SB12143NY). 110V, 25 watts.