The Farm Innovators Circulated Air Incubator easily accommodates up to 4 dozen eggs. The included fan kit pulls in fresh air to stabilize the temperature and improve hatching. A built-in hygrometer measures both internal temperature and relative humidity. Solid state circuitry provides long lasting and reliable temperature setting. A red indicator light shows when the heater is operating. Two large 9-1/2-Inch by 3-1/2-Inch viewing windows allow for observation of eggs. An additional thermometer is included. This is a great incubator for hobbyists and for educational purposes. Made with recycled and insulating polystyrene foam. 120 volts; 40 watts; 0.33 amps.The Farm Innovators Automatic Egg Turner automatically turns the eggs side to side every 4 hours to eliminate manual handling and improve hatch rate. Easy to use, simply place the egg turner in the bottom of the incubator and plug in. No assembly required.The Farm Innovators Egg Candler is used to check the development progress of eggs.