The original colour changing egg timer that sits in the saucepan with the eggs and changes colour to indicate when they are soft, medium or hard boiled. The sensor accounts for the number of eggs, the amount of water, and even the altitude at which the eggs are cooked, ensuring perfectly cooked eggs every time. It features graduated scales that show when eggs are soft, medium, or hard by sensing heat, making it more accurate than traditional timing. For best results, both eggs and timer should be placed in room temperature water and brought to a medium boil. After use, the timer should not be immersed in cold water but left to cool down naturally.