The GQF Mfg Thermal Air Hova-Bator Incubator has a radiant heat tube gently warms inside of the incubator, air and eggs. Thermal action of heated air flowing out of the exhaust vents in the top of the incubator, draws fresh air in through the bottom vent. This thermal air flow also assists the drying of the chicks after they hatch. Thermometer and plastic bottom liner included. Incubator will hold 50 duck or chicken eggs or 120 quail eggs. 18"L x 18"W x 9-1/2"D. 110-Volt AC, 25-watt heat element.