This 1602N Thermal Air Hova-Bator is an ideal incubator for classrooms and laboratory settings. This incubator is designed to provide consistent temperatures for hatching eggs, enabling excellent hatching rates. The GQF 1602N comes with an adjustable thermostat and a temperature indicator light. The Thermal Air Hova-Bator is perfect for classrooms, laboratories, and homes that need reliable and consistent egg-hatching results. Invented by G.Q.F. Manufacturing Co. over 30 years ago, the Hova-Bator is still the most economical incubator available. The radiant heat tube gently warms the inside of the incubator, the air, and the eggs. The 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. This design includes two small windows on top for viewing. The wafer thermostat is a proven, accurate technology that produces great hatch results. Returned items may be subject to a 20% restocking fee.