Norpro Egg Timer - Perfect Hard Boiled Egg Timer for Cooking, Baking, and Kitchen Use - Ideal for Breakfast Meal Prep and Home Chefs

The Original Color Changing Egg Timer changes colours as the egg cooks. Soft and hard boiled eggs cooked perfect everytime. 

Sits in pan with eggs. Graduated scales show when eggs are soft, medium or hard by sensing heat instead of time.