Circulated air incubator comes with automatic egg turner, completely rotates eggs every 4 hours, and is great for hatching all types of birds. Built-in hygrometer shows temperature and humidity. Fan kit pulls in fresh air to stabilize temperature and improve hatching. Large viewing windows 9-1/2" x 3-1/2". Red indicator light. Made with recycled and insulating polystyrene foam and includes a hard plastic shell over the top and bottom of the unit.