Note: This type is a mechanical timer that needs to be chained before use. Please read the instruction before use to avoid mistakes. No Batteries Required - The feather wound alarm can work without battery. The bell chimes automatically as it rotates to set the time for a mechanical drive. Multi-purpose: Our timer is very useful for cooking food and can prevent your cookies, cakes, roasts and casseroles from cooking be burned. Ideal for napping, exam timing, homework and time for fitness. Time Setting Range - You can set the time within 0-55 minutes as expected. The special and cute egg shape design makes your room or kitchen more special and charming. And you can also send it to your family and friend as a nice gift. Fashion cute style, so it is not only as a timer, also can decorate your home/office. It is shockproof, more durable, more accurate and more attractive.