No Batteries Are RequiredJust wind it up and set a time. The mechanical timer will work. Super cute timer for kids, Great for kitchen lover. A handy tool to have at the salon or home. Perfect for timing kids activities Unique DesignThis cute timer is made of plastic. Inside it made of precision steel. Unique shapes suitable for all ages. Easy to use and clean: wipe with a damp cloth. Cute Timer The charming design add an adorable point of interest to your kitchen gadgets. Super lovable accessory add more fun and practical element to your home. Cute timer for kids very much. Great Gift Choice Mechanical kitchen timer packaged by high-quality independent gift box. Each piece are under inspection before shipment. Perfect gift just right for almost any occasion: Anniversary, Mothers Day or birthday for your girlfriend, boyfriend, family etc. Note Tip The timer already installed anti-twisting device, please do not counterclockwise directly from 0, otherwise you will damage the timer. it wont work and alarm. Rotate clockwise to 55 and do not over 0, then rotate counterclockwise to any time you need. The deviation is +/-5% in line with industry standards. All of mechanical time managers are not exactly accurate to the second.