This mechanical kitchen timer is made of stainless steel, which is shock-resistant, more durable, accurate and attractive. No Batteries Required. The bell will automatically ring when it rotates to setting time for a mechanical drive. You can set up the time within 0-60 minutes. This egg timer is perfect for cooking food, which keeps your food from scorching and burning. Ideal for nap wakening. The special and cute egg shape design will make your room or kitchen more special.