This hova-Bator comes with a thermometer, plastic bottom liner to make clean-up easier, a built-in fan, and regulated itself in the 99 degree F (38 degree Celsius) range, so there is nothing to set up or adjust. Like all incubators, it requires a stable room temperature and should not be used in areas like sheds or barns. Excellent for classrooms, novices and experts. Check the incubating temperature requirements for your species of bird, but this can be used for most bird eggs. Dimensions (18" x 18" x 71/2") Automatic egg turners available. Without an automatic turner in place, the incubator will hold 50 large duck or chicken eggs or 140 quail eggs.