It adopts mechanical spring material, does not need battery, is simple and convenient, energy saving and environmental protection, the ringing sound is clear and loud, the duration is about 3-5 seconds, and the time range that can be set is 1-55 minutes.Simple operation, the timer along the scale from 0-20-40-55 minutes direction, to screw to 55 minutes position back to the time you need to set, so that the timer points with your choice of time alignmentEasy to store,the timer has a hanging hole behind the design, when not in use can be hung on the wall, the shape is lovely and interesting, but also can be used as decorations to beautify the kitchenMulti-purpose, can be used in the kitchen cooking food, baking, can also be used for sports, lunch breaks, beauty and other timing[100% Customer Satisfaction]:30 days money-back, when you are not satisfied with our product or you have any question, please contact with us to get a after-sale service, we will give you a satisfied response within 12 hours