The operating principle - the scale measures heat to show that the egg is soft, medium or solid. It absorbs heat to calculate the boiling time, high heat sensitivity that makes cooking eggs very easy. You can intuitively observe the size of the red area to determine the condition of the yolk - useful and fast - you can select the time according to your preference to close the fire. . Genius Application - Suitable for home, kitchen, hotel use. This egg clock comes as a practical gift to anyone who loves soft boiled, medium or hard boiled eggs. This egg clock, which is heat resistant and harmless, is completely for children and adults, made of high quality food class material, made of high quality food class material, you can ly use the egg with a pot. .Theterable egg timer - this boiled egg clock can be reused, only after each use, wash and dry it by hand, it will remain perfect without breaking or damaging.