Fully automatic egg incubator with both ac and dc inputs, it turns the eggs on its own every after two hours to ensure proper formation of the embryo, the plastic material is hard enough to not only ensure durability but also help preserve incubation condition for up to six hours in absence of electricity provided you do not open it.For efficient results ensure you use fresh eggs not older than seven days since they were laid, they must also be fertilized.use the outer water inlet, you do not need to open the whole incubator to add water, use the 250ml water bottle for that purpose at-least two bottles per day.Avoid opening your incubator as this lets out the good air conditions and gives it hard time of heating up.