Reusable Design: This hard-boiled egg timer is a reusable gadget that indicates how long the egg is heated. It changes color as the egg , showing you the perfect doneness every time. Exquisite Workmanship: This hard-boiled egg timer is made with food plastic, a safe material that is safe to cook with. You can use it to monitor the doneness of your eggs without worrying about harmful chemicals or toxins. Easy to Use: This hard-boiled egg timer is easy to use and shows you the exact hardness of your eggs. It changes color as the eggs cook, from red to green, indicating soft, medium, or hard-boiled. It is also and durable. Easy to Clean: This hard-boiled egg timer is made of durable material that 't break and can be hand washed easily. You can use it anytime and anywhere to make perfect eggs. Novel and Interesting: This hard-boiled egg timer is a great gift for anyone who loves household gadgets. It changes color as the eggs cook, showing the doneness level from soft to hard. Style:A Colour: Material:Plastic Size:5.5x4x3.2cm Package Contents: 1 * Egg boiling timer(No need to charge or use batteries.) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.