With the amazing Eggsact timer, you'll get your eggs just the way you like them, every time. Placed in the water with your eggs, the Eggsact heats up, darkening from the outside in as it "ccoks" in synchronization with your eggs. The darker the Eggsact gets, the more done are your eggs; you'll see just how far the eggs have cooked, as the color changes across the "soft", "medium" and "hard" indicators.